Developing softwareformobilesandtablets

Developing Software for Future Technologies (Tablets and Mobile phones) Atul Nene (Atul.Nene@symphonysv.com) Symphony Services (www.symphonysv.com)

Target Audience • General Users, Students • Non developers, non technical persons • Beginner to Intermediate level developers and designers • Entrepreneurs with Mobile Product/App plans • Everyone curious about this whole ‘Mobile’ thing  Show of hands  22011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

About Symphony Services • Part of the Symphony Software Technology Group • Global presence, Engineering concentrated in Bangalore, Pune and Gurgaon • Work on large variety software technologies, have ‘Centers of Excellence’ • Work with large number of marquee clients from startups to Fortune 500 • Special focus on Innovation: ‘Chairman’s Award for Innovation’ given every year. • Work environment that fosters talent and professionalism and blends with a ‘fun’ culture • Mobile Achievements: – Intellectual Property owners of cross platform mobile application development platform for enterprise applications – Hundreds of Native stand-alone apps, cross-platform HTML5 apps, Smartphone frontend for Cloud applications on all mobile platforms – Worlds First Mobile Client Application for Google Health™ on Android platform published on Android Marketplace 32011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

About Me • MCS from University of Pune • 15+ years of work experience • Work as an Engineering Manager • Lead teams that build end (Sensor) to end (Server) products on Android, iPhone and Blackberry • Student of Hindustani Classical Music • Twitter: @atulnene • Personal Blog: www.atulnene.com 42011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Table of Contents • The Future is Here, Now • Focus on the Users and their Experience • How Mobile is different • Input Methods, Sensors, Security • Quick overview of Developing for Mobile • Case Study – Smart Traveller • Ideas • Fun Quiz  and Prizes  to be won along the way ! • Dwell on some #Gyan  as takeaway … 52011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Fun Quiz #1 What is the number of mobile phone users in India  • 13.5 million • 330 million • 865 million • 1 billion 62011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Fun Quiz #1 What is the number of mobile phone users in India  • 13.5 million • 330 million • 865 million  • 1 billion As of August 2011: 865 million (Source Wikipedia)  72011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

The Future is Here, Now • Total number of Mobile Subscribers has CAGR 62% during 2004-05 and 2009-10 and a forecast of CAGR 28% through 2013-14 • More growth in Rural areas than Urban: – 100% penetration in urban areas – near saturation – 33% handsets of 108M sold in Rural areas in 2009-10 • Handset manufacturing strategies have redesigned their distribution strategies with Rural focus – Entry level handsets will continue to drive volumes – Smartphones will outpace the industry growth, as cost go down: color and camera phones cost Rs.1000 today • Handset sales in Rural market to grow at CAGR 19% through 2014 Source : RNCOS Report on “Booming Rural Mobile Market in India” http://www.rncos.com/Market- Analysis-Reports/Booming-Rural-Mobile-Market-in-India-IM306.htm 82011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

The Future is Here, Now Mobile Subscribers (Million) Handset Sales in Rural Areas (Million) 1600 1400 80 1200 70 1000 60 800 50 600 40 400 Mobile Subscribers Handset Sales in Rural 30 200 (Million) Areas (Million) 20 0 10 0 Source : RNCOS Report on “Booming Rural Mobile Market in India” http://www.rncos.com/Market-Analysis-Reports/Booming-Rural-Mobile-Market-in- India-IM306.htm 92011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

The Future is Here, Now • the number of people in the world 7 billion today • the number of people with mobile 3.4 billion devices today... • globally, the number of mobile internet 1.3 billion users today "The future is already here – it’s just not evenly distributed.“ – William Gibson Technology should not only be accessible but inclusive and available to everyone... 2011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp. it’s about people not devices 10

The Future is Here, Now Source: Morgan Stanley ‘The Mobile Internet Report Key Themes’ www.ms.com/techresearch 112011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

The Future is Here, Now 122011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Fun Quiz #2 What was the weight of the world’s first mobile phone (DynaTAC 8000x by Motorola in 1973)  • 100 grams • 500 grams • 1 kg • 1.2 kg 132011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Fun Quiz #2 What was the weight of the world’s first mobile phone (DynaTAC 8000x by Motorola in 1973)  • 100 grams • 500 grams • 1 kg  • 1.2 kg 1 kg (Source Wikipedia)  142011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Needs & Drivers • People need online, offline, personalized apps • Optimized utilization of mobile device • Large mobile user base • Smartphone (portable devices) has become integrated part of life, diminishing dependence on desktop PC • Perfect confluence of market and technology trends • Innovative apps, solutions around mobile phone to increase ARPU 152011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

#Gyan  {User Experience is everything} If your product doesn’t serve the Users need, its not a product. If your user doesnt love your product, you soon don’t have a product. 162011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

You have to ask the User You think the user wants this: Source: Modelling theMobile UserExperience, by bryan rieger 172011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

You have to ask the User While the user wants this: Source: Modelling theMobile UserExperience, by bryan rieger 182011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Do you know your User ? • A private device used in highly different mostly public contexts • Usage varies by geography • Easily distracted users A very different kind of user Lets meet a few of them … And see how they will use their mobiles … 192011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Huge Market, Diverse Users 202011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Festival Revellers Traffic Diversions ? Tide Details How much time-gap When is the between the procession next-in-line supposed to end mandal ? according to the Lyrics Almanac ? of Aarti 212011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Shoppers in Chennai Which shop Shopping has a List matching stole ? Best Deal on the Road ? 222011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Sports fans I should SMS- When was Checkin his last into my century ? flight Which is the fastest gate out of this crowd ? 232011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Democracy participants Refer a particular day’s Lookup proceeding details of a particular law Give input to a VIP security management system Refer leader’s File a news previous report with speech video 242011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Democracy Improvers Closer look Which is the at what’s nearest place happening on to eat ? the dais … Pledge support on Anna Hazare’s website Search for Anna Hazare caps and T-shirts nearby 252011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Consumers of services Order a samosa Which is from the the next pantry car connecting train ? 262011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Chaandrayaan-1 launch observers Live, real- When’s the Live time next bus update to updates of back home. photo blog the launch. from venue 272011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Art Lovers More Live-tweet information on the event the Performing updates Artist Add event to my calendar Book ticket for next day 282011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

The Worker Bees Current market Weather USE GPS prices for my and safety information catch ? information overlaid on Notify the buyer of map to stay catch size, type. close to shore 292011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

The Worker Bees Why didn’t Availability the laborers of fertilizers When is it turn up yet ? in the market going to rain next ? 302011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

#Gyan  {Mobile = 7th Mass Media} The first 6 are 1. Printing Press, 2.Recordings, 3. Cinema, 4.Radio, 5.Television, 6.The Internet 312011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

#Gyan  {Mobile Is The ONLY Mass Medium That Can Do EVERYTHING The Previous Six Can Do} Again: 1. Printing Press, 2.Recordings, 3. Cinema, 4.Radio, 5.Television, 6.The Internet To connect to users, local language is extremely important. Source: Garrett Murray, Web 2.0 Expo — New York, September 16, 2008 322011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

5 UNIQUE BENEFITS 1. First truly personal mass media – e.g. Ever heard of a shared individual mobile number ? 2. First always-on mass media – Information is always available 24/7, even when idle 3. First always-carried mass media – Most people sleep with their phones within reach 4. Only mass media with a built-in payment channel – Vote for Indian Idol over SMS (and spend Rs. 10)—many more people have phones than credit cards 5. Offers point of thought – Ability to create or consume content whenever the mood strikes Source: Garrett Murray, Web 2.0 Expo — New York, September 16, 2008 332011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

#Gyan  {Mobile != Phone} Mobile presents an opportunity to invent new ways for users to interact with information. 342011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Urban Mobile Users • Mobile users live in a 360°environment – Short attention span – Difficult to multi-tasking, easy to get lost (“waste time”) – Sudden interruptions – Momentary social context – Need to Tweet or send directly to Facebook, Digg etc. • Mobile users move around a lot – ride a bike, drive a car, walk around a shopping mall, store • Mothers use mobile as family device – Entertain, Plan, Share – Apps for Kids – Shopping and other lists 352011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Urban Mobile Users Source: How smartphone owners describe their phones. Pew Internet & American Life Project, Jul 11, 2011, http://pewinternet.org/Infographics/2011/Smartphones.aspx , accessed on Dec 7, 2011. 362011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Urban Mobile Users Source: Generations 2010: What different generations do online. Pew Internet & American Life Project, Dec 16, 2010, http://pewinternet.org/Infographics/2010/Generations-2010-Summary.aspx, accessed on Dec 7, 2011. 372011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

#Gyan  {Mobile = 30 sec PC/Tab = 30 min} Most people do small unplanned tasks on mobile and planned longer tasks on PCs and Tablets. 382011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Mobile is different Complex Multiple Relationships Source: Rachel Hinman @ Adaptive Path Objects Relationships Objects People Semantic People Places Social Places Things Spatial Things Temporal 392011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Mobile is different • The same apps will need to look and work differently on the mobile – the UI takes up the whole screen! • Relatively small screen, but varying sizes, resolutions – Pixel sizes vary, 2 orientations – Image magnification is a problem – 9 patch – Limited fonts – Peculiar problems like sun-blind screen • ‘Glanceability’ of data: multiple screens, widgets • Bandwidth costs real money • Search – take 3 times longer than desktop – Users are more focused on an immediate answer rather than on the breadth of information. 402011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Mobile is different • Relatively low power cpu, memory • Many variations, telephony, non-telephony devices • No mouse, minimum keyboard – only (instinctive) Touch – Opportunity to design for quick usage – Respect the users time: its precious – Lengthy steps/interactions discourage users • Limited battery life • Multi-purpose, communications focused • Assortment of sensors • Multiple, inconsistent connectivity options in addition to Telephony: GPS, 3G, Wifi, BlueTooth, NFC (beware of network lag) • You need to have an Over-The-Air strategy (Product/Application Updates, Data updates) 412011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

422011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Fun Quiz #3 Which is the recently launched device that has a stylus and aims to blur the distinction between a tablet and a phone  • Samsung Galaxy Note • HTC Chacha • iBall ‘Arpan’ • None of the Above 432011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Fun Quiz #3 Which is the recently launched device that has a stylus and aims to blur the distinction between a tablet and a phone  • Samsung Galaxy Note  • HTC Chacha • iBall ‘Arpan’ • None of the Above Samsung Galaxy Note  442011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Do This to Win Users • Usability Studies are critical success factors: watch people in the real world, paper prototypes, usability testing, user interviews • Typical mobile devices cannot present a full desktop experience – strategize a functional split, digestion of content is different for each screen • Adapt to device: exploit features where present, work-around problems otherwise • Design for network efficiency: zip up data, use structured markup, offload to server, use cache • Use interlinking of mobile apps: phone number => call • Make use of historical and real-time analytics and feed it back into the product • Read public reviews of other products 452011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Input Methods Technology Words Per Minute T9 32 Graffiti/Jot 18 Handwriting 28 Swype 40 PC QWERTY Keyboard 70 Mobile QWERTY Keyboard (Thumbing) 35 Voice Recognition ?? Infra Red Beam Projection 70 • These numbers are subject to User Habituation and may vary across demographies • There is scope for more types of input methods, for example application specific symbol based data input • Local Indian languages need different solutions than for English 462011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Sensors, Security • Sensors and APIs – Interaction Points: Touch, Multi-Touch (custom), Shake (Accelerometer), Vibration, Voice, GPS, Gyro – APIs: BlueTooth, Wifi, Telephony, Open-GL, Location, WAP, SMS, SQLite, Camera, Audio, Video, Input Methods, Map • Security – That connected devices will be hacked, attacked and diverted is inevitable. The only truly secure device is an unconnected one. Sadly this is not an option. The only solution is education and vigilance for customers and a robust security strategy for product developers. – O-Auth is highly suited due to its granular approach 472011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Testing • Test on as many different devices as you can • Look for Automation opportunities • Emulator tests should precede device tests • Remote Access services like DeviceAnywhere for testing on larger set • Testing costs more on mobile platforms due to carrier charges 482011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Classes of Applications • Carrier – Mobile Money, Call Management • Enterprise – Mobile banking, Mobile Data Management • End Users – Personal Productivity – Music – Coupons – Map based 492011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Classes of Applications • Carrier – Mobile Money, Call Management • Enterprise – Mobile banking, Mobile Data Management • End Users – Personal Productivity – Music – Coupons – Map based 502011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Development Platforms • iPhone (Objective C) • Android (Java) • Symbian (J2ME, C++, Qt) • Blackberry (J2ME) • Flash • Windows Phone 7 • HTML 5 • Bada, BREW, MeeGo • Web OS 512011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

#Gyan  {Platform = Stage} Choose carefully. The platform is a stage that defines an audience you reach. Likely, you will need to choose multiple platforms. 532011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

#Gyan  {Fragmentation = inability to “write once and run everywhere.”} Choose the platform of the Users of your product/service. 542011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Design != Development Source: Modelling theMobile UserExperience, by bryan rieger 552011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Typical Development Method • Well rounded team of Designers, Engineers, and QA – If you also have ‘Users’ on your team, you have a winning combination • Iterative cycle of Design-Develop-Test-Deploy-Revisit for successive feature sets allowing ‘Fail Forward’ • Use of platform-specific set of development tools, utilities, emulators, and devices • Platform specific App-Stores, publishing, distribution and payment methods, revenue share, promotions, analytics and feedback mechanisms • Platform specific monetization opportunities, in-app purchases, ads, freemium 562011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

The Pot of Gold at the end of the Rainbow 1. Wealth Creation / Destruction is Material in New Computing Cycles – Now in Early Innings of Mobile Internet Cycle, the 5th Cycle of Last Half Century. 2. Mobile Ramping Faster than Desktop Internet Did and Will Be Bigger Than Most Think – 5 Trends Converging (3G + Social Networking + Video + VoIP + Impressive Mobile Devices). 3. Apple Leading in Mobile Innovation + Impact, for Now – Depth of App Ecosystems + User Experience + Pricing Will Likely Determine Long-Term Winners. 4. Game-Changing Communications / Commerce Platforms (Social Networking + Mobile) Emerging Very Rapidly. 5. Growth / Monetization Roadmaps Provided by Japan Mobile + Desktop Internet. 6. Massive Data Growth Driving Carrier / Equipment Transitions. 7. Compelling Opportunities in Emerging Markets. 8. Regulators Can Help Advance / Slow Mobile Internet Evolution. Source: The Mobile Internet Report, Morgan Stanley, 2009 572011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Case Study – Smart Traveller: Real-Time Tracking System Using GPS • Objectives – 1. Assist bus commuters in availing the travelling alternates (prescheduled and real time (if available)) – 2. Accept real time updates from the commuters and make this information available to other commuters (if relevant) with appropriate confidence level – 3. Predict the shift in time for arrival of the bus(es) with appropriate confidence level • Technologies used – Android, JSON, GWT, GAE (cloud), JDO, HTML, CSS – Database – App Engine datastore • Tools Used – Eclipse IDE, Android Emulator 582011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Smart Traveller – System Overview 592011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Smart Traveller – Future Possibilities Ideal project for an NGO that cares about civic issues. Future: Shortest route by distance, time Future: Pay for ticket using NFC Future: Show integrated real-time map 602011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Smart Traveller – Mobile Client 612011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Smart Traveller – Server • ORM – Object Relational Model – Database entities modeled using JDO • Database – All the modifications to the database are handled – Triggers, constraints – Convenience methods • Queries – For real time updates, the schedule for each update is calculated – Output modeled into objects for JSON serialization • Admin GUI – Maintain Routes, Buses, Schedules – Manage Security, Confidence levels, – Monitor uptime and performance 642011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Ideas • Traffic and Transportation – Autorikshaw, Taxi Tariffs – Traffic updates – Bus, Train Routes, Schedules, Real Time information • Image analysis – from a photo to information – QRCode applications • Data Input Methods for Indic languages – Font support – Transliteration – Dictionary – Integration into applications like SMS – Voice recognition • Puzzles, Quiz 652011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

WE have a long way to go … … to make available, products and services that are highly useful in the local context. Can you spot the opportunity (s) ? 662011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Ideas • Information lookup: App + SMS – All subjects: dictionaries, definitions, short answers – Music, films, reviews, ratings, recommendations – Literacy and linguistics – Health: food, calories, glycemic index, lifestyle habits, exercise, first-aid, tele-healthcare with mobile outreach – Government office procedures – NGOs and Social Organizations – Almanac • Advice, Counselling, Helplines over SMS, • Education – Courseware – Online exams • Location-aware computing: GPS, Compass, RFID, NFC – Multiplayer games – Augmented reality – Kinect (See Pranav Mistry’s TED talk) 672011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

NFC Near Field Communication: A short-range wireless standard that allows devices to communicate securely and perform transactions. Eg. Keyless car entry. Source: Mobile Trends - June 2011, www.space150.com 682011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

The world is still not in your pocket Source: http://www.flickr.com/photos/williambrawley/4310319103/ 692011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

#Gyan  {SMS=Underutilized} SMS has maximum reach. Many Apps can be based purely on SMS. Carriers need to make SMS more reliable. 702011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

#Gyan  {„search‟ *follows* lack of handy information source} ‘Google It’ is not the answer to every info need. Contents of search results are not always accurate or up-to-date. Search doesn’t work over SMS. Process of searching and finding is sub-optimal 712011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Ideas • Community work – Map overlays for various places of interest – Recipes • Travel – Real time planning using maps and costs and alternatives off the web • Calendaring/Meeting Plans • Group Chats • Mass Communications – Surveys – Opinion Polls 722011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Global Case Study: Think Mobile, Act Local • World Watch | May/June 2010 | www.worldwatch.org • ICT4D: information and communication technologies for development: implementation in Africa • Application – FrontlineSMS – Farmers co-operative: updates on crop prices – church group sends reminders about prayer services – Medic – health outreach - St. Gabriel’s and health clinics in 10 different countries coordinate patient appointments and home visits via SMS. – Earthquake Response – emergency services – Report election-related violence and report their location: ushahidi.com 732011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Resources • Book: Made To Stick, by Chip & Dan Heath • Book: Simple and Usable Web Mobile and Interaction Design, by Giles Colborne • Book: Head First Android Development, by Jonathan Simon • Book: Tapworthy, by Josh Clark • Book: Android™ Wireless Application Development, by Shane Conder, Lauren Darcey • Paper: Mobile App Design Best Practices, For Application Development & Delivery Professionals, published April 2011, Forrester Research • mobiledesign.org http://mobiledesign.org/ • WURFL http://wurfl.sourceforge.net • The Mobile Internet Report www.ms.com/techresearch • mobiForge: Mobile Web Development Community http://mobiforge.com/ • Respective platform developer guides 742011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

I have the answer to all your questions: “It Depends”  Q&A If you have questions with longer answers, send me email  752011© Symphony Services Corp. | Proprietary & Confidential 2009© Symphony Services Corp.

Developing softwareformobilesandtablets

by Atul Nene on Dec 15, 2011

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