Understanding Mobile Application Usage

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  • 1. Understanding 
 Mobile Application Usage Dr. Matthias Böhmer DFKI GmbH ! IBM Developer Days 2013 Zürich, Switzerland !
  • 2. 1983
  • 3. Evolution
  • 4. Today - Hardware changed Connectivity improved App stores arose
  • 5. Growth of Mobile Ecosystem 1.1.3 The Age of Application Stores 7 Apple AppStore Jan-13 Aug-12 Mar-12 Oct-11 May-11 Dec-10 Jul-10 Feb-10 Sep-09 Apr-09 Nov-08 1,000,000 900,000 800,000 700,000 600,000 500,000 400,000 300,000 200,000 100,000 0 Jun-08 Available Applications Google Play Market Figure 1.3: Number of applications available per application stores between June 2008 to June 2013.14 - Number of available mobile apps is increasing providers to of app and distribute their applications [7], and for rapidly is growing - Numberdevelop, marketdownloads applications since the end-users such platforms provide a convenient way to access end-users do not time spent with any technical details [124]. While increases customization - Dailyhave to handleand audio profilesapps also the feature of first of a phone’s look and feel was a very important mobile phones [109], being able to also customize phone’s functionality in terms of
  • 6. Challenges for Users Discovering Launching Housekeeping Multitasking
  • 7. ! ! ! ! Launching How do people ! ! ! ! ! ! utilize the apps they ! ! ! Housekeeping Discovering have installed? Multitasking ! ! !
  • 8. App Lifecycle being used open close not being used install uninstall update
  • 9. ! ! ! who ! A ! ! which app ! ! ! when ! ! ! how long AppSensor: Tracing App Usage ! ! ! where
  • 10. Data from Deployment - 4,125 users (from various countries) - 22,626 apps (from 20 categories) - 4.92 million data points (launches) - 127 days (approx. 4 month of data)
  • 11. 200,000 175,000 150,000 125,000 100,000 75,000 50,000 25,000 12 am 1 am 2 am 3 am 4 am 5 am 6 am 7 am 8 am 9 am 10 am 11 am 12 pm 1 pm 2 pm 3 pm 4 pm 5 pm 6 pm 7 pm 8 pm 9 pm 10 pm 11 pm Application launches During Course of a Day - App usage correlates with circadian circle - Type of apps used changes during the day
  • 12. !"#$%&" '#((+,)*-.)#, /,.&".-),(&,. 0),-,*& 1-(&% 2&-3.4 5)6"-")&%7879&(# 5):&%.;3& <+3.)(&=)- >&$% ?"#=+*.)@).; A&:&"&,*& B&..),C% B4#DD),C B#*)-3 BD#".% E4&(&% E##3% E"-@&3 F,G,#$, !"#$%&" '#()*% '#((+,)*-.)#, /,.&".-),(&,. 0),-,*& 1-(&% 2&-3.4 5)6"-")&%7879&(# 5):&%.;3& <+3.)(&=)>&$% ?"#=+*.)@).; A&:&"&,*& B&..),C% B4#DD),C B#*)-3 BD#".% E4&(&% E##3% E"-@&3 F,G,#$, '#()*% Application Chains B-(D IJKL MJNL MMJOL PJPL PJML MJQL PJIL PJIL PJKL RJQL RRJOL MJOL PJNL RJSL MJNL RQJNL PJQL PJML OJRL IJIL NJRL KO NJQL UJKL MNJRL PJPL PJIL KJOL PJNL PJIL PJNL QJIL IJSL KJRL PJNL IJIL QJIL KJML PJNL PJKL OJKL IJSL QJPL MR QJSL IJSL NQJQL PJPL PJIL RJQL PJRL PJRL PJIL RJML IJRL IJQL PJML RJPL RJSL KJOL PJKL PJRL QJPL RJKL MJIL KMK NJSL NJRL INJRL PJPL PJPL MJML PJNL PJPL PJNL QJNL PJNL IJOL PJPL MJML SJIL MJML MJML PJPL OJML QJNL RNJSL RPJML MJSL MSJML PJPL RJOL IJUL PJIL PJML PJIL RJQL OJNL MJQL PJRL RJQL QJQL NJRL PJSL PJRL RPJNL RJUL MJRL R RRJOL QJUL MPJKL PJPL PJML RQJRL PJML PJKL PJSL RJPL IJRL KJIL PJSL RJQL NJQL KJPL PJOL PJRL OJML RJSL KJIL O MJOL KJOL MKJML PJPL PJML IJQL NJRL PJNL RJIL NJRL IJUL MJRL RJNL IJML NJPL KJUL PJOL PJPL RIJKL IJML MJUL NJPL MJSL IMJML PJPL PJIL IJML PJML IJNL PJOL RJML RJSL MJIL PJML RNJIL RRJUL MJSL PJML PJRL RMJKL MJIL QJQL R M OJIL QJML RSJML PJPL PJRL KJPL PJQL PJNL MJPL PJUL IJML KJML PJSL IJML IOJSL MJRL PJIL PJKL RPJIL IJIL QJQL K NJIL RPJQL MOJIL PJPL PJIL RJKL PJNL PJIL PJKL IJQL IJQL NJIL PJML IJPL RJOL KJKL PJML PJKL UJQL MJIL UJRL RI MMJNL MJML MMJML PJPL PJQL RJNL PJIL PJRL PJIL RJKL MJUL IJUL PJKL RJKL MJPL MJSL PJKL PJPL NJQL RJPL IJKL SJKL QJPL MOJQL PJPL PJKL IJNL PJKL PJIL PJNL IJOL IJOL SJIL RJRL MJOL KJOL QJRL PJNL PJML UJSL IJKL KJKL IQ MR RMJRL KJQL MKJML PJPL PJIL SJQL PJNL PJML RJPL RJPL IJQL KJNL IJUL RJSL QJIL KJRL PJKL PJIL UJOL RJSL KJKL I OJUL QJNL INJML PJRL PJIL RJOL PJKL QJIL PJSL IJPL IJNL NJUL PJQL PJPL QJNL KJSL PJNL PJQL RRJNL KJOL RRJRL OJQL SJOL IMJIL PJPL PJKL KJOL PJKL PJUL UJNL PJUL IJOL QJIL PJSL MJPL KJSL KJML PJQL PJQL RNJNL RJNL MJOL RM IR IKJRL MJPL MQJML PJPL PJML IJML PJIL PJIL PJML RJIL IJUL IJOL PJML RJQL IJSL RIJKL PJSL PJRL QJML RJIL MJML MQ KJML KMJML PJRL PJKL IJQL PJKL PJIL PJML RJML MJPL KJOL PJQL IJKL MJOL QJKL SJNL PJPL SJPL RJQL MJUL I OJQL RPJIL MSJIL PJPL PJIL IJKL PJRL PJIL RJKL MJIL PJKL KJSL PJKL MJML NJQL MJNL PJRL RJIL OJNL MJML KJNL RRJPL QJRL MNJRL PJPL PJIL IJSL PJML PJKL PJNL IJRL IJKL KJIL PJNL IJRL QJQL KJRL PJKL PJIL RQJSL IJOL MJQL NJSL UJRL MNJIL PJRL PJIL IJML PJML PJQL PJSL RJUL RJNL NJSL PJKL QJPL IJUL KJKL PJML PJIL RPJIL NJNL MJNL RPJSL KJKL KPJOL PJRL PJIL IJRL PJIL PJML PJNL MJUL RJOL MJIL PJML MJUL IJUL KJSL PJML PJIL RJQL RRJNL R OO RI KO SJKL NJKL probability of transitions
  • 13. !"#$%&" '#((+,)*-.)#, /,.&".-),(&,. 0),-,*& 1-(&% 2&-3.4 5)6"-")&%7879&(# 5):&%.;3& <+3.)(&=)- >&$% ?"#=+*.)@).; A&:&"&,*& B&..),C% B4#DD),C B#*)-3 BD#".% E4&(&% E##3% E"-@&3 F,G,#$, !"#$%&" '#()*% '#((+,)*-.)#, /,.&".-),(&,. 0),-,*& 1-(&% 2&-3.4 5)6"-")&%7879&(# 5):&%.;3& <+3.)(&=)>&$% ?"#=+*.)@).; A&:&"&,*& B&..),C% B4#DD),C B#*)-3 BD#".% E4&(&% E##3% E"-@&3 F,G,#$, '#()*% Application Chains B-(D IJKL MJNL MMJOL PJPL PJML MJQL PJIL PJIL PJKL RJQL RRJOL MJOL PJNL RJSL MJNL RQJNL PJQL PJML OJRL IJIL NJRL KO NJQL UJKL MNJRL PJPL PJIL KJOL PJNL PJIL PJNL QJIL IJSL KJRL PJNL IJIL QJIL KJML PJNL PJKL OJKL IJSL QJPL MR QJSL IJSL NQJQL PJPL PJIL RJQL PJRL PJRL PJIL RJML IJRL IJQL PJML RJPL RJSL KJOL PJKL PJRL QJPL RJKL MJIL KMK NJSL NJRL INJRL PJPL PJPL MJML PJNL PJPL PJNL QJNL PJNL IJOL PJPL MJML SJIL MJML MJML PJPL OJML QJNL RNJSL RPJML MJSL MSJML PJPL RJOL IJUL PJIL PJML PJIL RJQL OJNL MJQL PJRL RJQL QJQL NJRL PJSL PJRL RPJNL RJUL MJRL R RRJOL QJUL MPJKL PJPL PJML RQJRL PJML PJKL PJSL RJPL IJRL KJIL PJSL RJQL NJQL KJPL PJOL PJRL OJML RJSL KJIL O MJOL KJOL MKJML PJPL PJML IJQL NJRL PJNL RJIL NJRL IJUL MJRL RJNL IJML NJPL KJUL PJOL PJPL RIJKL IJML MJUL NJPL MJSL IMJML PJPL PJIL IJML PJML IJNL PJOL RJML RJSL MJIL PJML RNJIL RRJUL MJSL PJML PJRL RMJKL MJIL QJQL R M OJIL QJML RSJML PJPL PJRL KJPL PJQL PJNL MJPL PJUL IJML KJML PJSL IJML IOJSL MJRL PJIL PJKL RPJIL IJIL QJQL K NJIL RPJQL MOJIL PJPL PJIL RJKL PJNL PJIL PJKL IJQL IJQL NJIL PJML IJPL RJOL KJKL PJML PJKL UJQL MJIL UJRL RI MMJNL MJML MMJML PJPL PJQL RJNL PJIL PJRL PJIL RJKL MJUL IJUL PJKL RJKL MJPL MJSL PJKL PJPL NJQL RJPL IJKL SJKL QJPL MOJQL PJPL PJKL IJNL PJKL PJIL PJNL IJOL IJOL SJIL RJRL MJOL KJOL QJRL PJNL PJML UJSL IJKL KJKL IQ MR RMJRL KJQL MKJML PJPL PJIL SJQL PJNL PJML RJPL RJPL IJQL KJNL IJUL RJSL QJIL KJRL PJKL PJIL UJOL RJSL KJKL I OJUL QJNL INJML PJRL PJIL RJOL PJKL QJIL PJSL IJPL IJNL NJUL PJQL PJPL QJNL KJSL PJNL PJQL RRJNL KJOL RRJRL OJQL SJOL IMJIL PJPL PJKL KJOL PJKL PJUL UJNL PJUL IJOL QJIL PJSL MJPL KJSL KJML PJQL PJQL RNJNL RJNL MJOL RM IR IKJRL MJPL MQJML PJPL PJML IJML PJIL PJIL PJML RJIL IJUL IJOL PJML RJQL IJSL RIJKL PJSL PJRL QJML RJIL MJML MQ KJML KMJML PJRL PJKL IJQL PJKL PJIL PJML RJML MJPL KJOL PJQL IJKL MJOL QJKL SJNL PJPL SJPL RJQL MJUL I OJQL RPJIL MSJIL PJPL PJIL IJKL PJRL PJIL RJKL MJIL PJKL KJSL PJKL MJML NJQL MJNL PJRL RJIL OJNL MJML KJNL RRJPL QJRL MNJRL PJPL PJIL IJSL PJML PJKL PJNL IJRL IJKL KJIL PJNL IJRL QJQL KJRL PJKL PJIL RQJSL IJOL MJQL NJSL UJRL MNJIL PJRL PJIL IJML PJML PJQL PJSL RJUL RJNL NJSL PJKL QJPL IJUL KJKL PJML PJIL RPJIL NJNL MJNL RPJSL KJKL KPJOL PJRL PJIL IJRL PJIL PJML PJNL MJUL RJOL MJIL PJML MJUL IJUL KJSL PJML PJIL RJQL RRJNL R OO RI KO SJKL NJKL probability of transitions
  • 14. !"#$%&" '#((+,)*-.)#, /,.&".-),(&,. 0),-,*& 1-(&% 2&-3.4 5)6"-")&%7879&(# 5):&%.;3& <+3.)(&=)- >&$% ?"#=+*.)@).; A&:&"&,*& B&..),C% B4#DD),C B#*)-3 BD#".% E4&(&% E##3% E"-@&3 F,G,#$, !"#$%&" '#()*% '#((+,)*-.)#, /,.&".-),(&,. 0),-,*& 1-(&% 2&-3.4 5)6"-")&%7879&(# 5):&%.;3& <+3.)(&=)>&$% ?"#=+*.)@).; A&:&"&,*& B&..),C% B4#DD),C B#*)-3 BD#".% E4&(&% E##3% E"-@&3 F,G,#$, '#()*% Application Chains B-(D IJKL MJNL MMJOL PJPL PJML MJQL PJIL PJIL PJKL RJQL RRJOL MJOL PJNL RJSL MJNL RQJNL PJQL PJML OJRL IJIL NJRL KO NJQL UJKL MNJRL PJPL PJIL KJOL PJNL PJIL PJNL QJIL IJSL KJRL PJNL IJIL QJIL KJML PJNL PJKL OJKL IJSL QJPL MR QJSL IJSL NQJQL PJPL PJIL RJQL PJRL PJRL PJIL RJML IJRL IJQL PJML RJPL RJSL KJOL PJKL PJRL QJPL RJKL MJIL KMK NJSL NJRL INJRL PJPL PJPL MJML PJNL PJPL PJNL QJNL PJNL IJOL PJPL MJML SJIL MJML MJML PJPL OJML QJNL RNJSL RPJML MJSL MSJML PJPL RJOL IJUL PJIL PJML PJIL RJQL OJNL MJQL PJRL RJQL QJQL NJRL PJSL PJRL RPJNL RJUL MJRL R RRJOL QJUL MPJKL PJPL PJML RQJRL PJML PJKL PJSL RJPL IJRL KJIL PJSL RJQL NJQL KJPL PJOL PJRL OJML RJSL KJIL O MJOL KJOL MKJML PJPL PJML IJQL NJRL PJNL RJIL NJRL IJUL MJRL RJNL IJML NJPL KJUL PJOL PJPL RIJKL IJML MJUL NJPL MJSL IMJML PJPL PJIL IJML PJML IJNL PJOL RJML RJSL MJIL PJML RNJIL RRJUL MJSL PJML PJRL RMJKL MJIL QJQL R M OJIL QJML RSJML PJPL PJRL KJPL PJQL PJNL MJPL PJUL IJML KJML PJSL IJML IOJSL MJRL PJIL PJKL RPJIL IJIL QJQL K NJIL RPJQL MOJIL PJPL PJIL RJKL PJNL PJIL PJKL IJQL IJQL NJIL PJML IJPL RJOL KJKL PJML PJKL UJQL MJIL UJRL RI MMJNL MJML MMJML PJPL PJQL RJNL PJIL PJRL PJIL RJKL MJUL IJUL PJKL RJKL MJPL MJSL PJKL PJPL NJQL RJPL IJKL SJKL QJPL MOJQL PJPL PJKL IJNL PJKL PJIL PJNL IJOL IJOL SJIL RJRL MJOL KJOL QJRL PJNL PJML UJSL IJKL KJKL IQ MR RMJRL KJQL MKJML PJPL PJIL SJQL PJNL PJML RJPL RJPL IJQL KJNL IJUL RJSL QJIL KJRL PJKL PJIL UJOL RJSL KJKL I OJUL QJNL INJML PJRL PJIL RJOL PJKL QJIL PJSL IJPL IJNL NJUL PJQL PJPL QJNL KJSL PJNL PJQL RRJNL KJOL RRJRL OJQL SJOL IMJIL PJPL PJKL KJOL PJKL PJUL UJNL PJUL IJOL QJIL PJSL MJPL KJSL KJML PJQL PJQL RNJNL RJNL MJOL RM IR IKJRL MJPL MQJML PJPL PJML IJML PJIL PJIL PJML RJIL IJUL IJOL PJML RJQL IJSL RIJKL PJSL PJRL QJML RJIL MJML MQ KJML KMJML PJRL PJKL IJQL PJKL PJIL PJML RJML MJPL KJOL PJQL IJKL MJOL QJKL SJNL PJPL SJPL RJQL MJUL I OJQL RPJIL MSJIL PJPL PJIL IJKL PJRL PJIL RJKL MJIL PJKL KJSL PJKL MJML NJQL MJNL PJRL RJIL OJNL MJML KJNL RRJPL QJRL MNJRL PJPL PJIL IJSL PJML PJKL PJNL IJRL IJKL KJIL PJNL IJRL QJQL KJRL PJKL PJIL RQJSL IJOL MJQL NJSL UJRL MNJIL PJRL PJIL IJML PJML PJQL PJSL RJUL RJNL NJSL PJKL QJPL IJUL KJKL PJML PJIL RPJIL NJNL MJNL RPJSL KJKL KPJOL PJRL PJIL IJRL PJIL PJML PJNL MJUL RJOL MJIL PJML MJUL IJUL KJSL PJML PJIL RJQL RRJNL R OO RI KO SJKL NJKL probability of transitions
  • 15. Support for App Launching - Adaptive launcher menu - Support visual search for apps Presenting 5 icons for next app - Implements different models - Most frequently used apps Most recently used apps Sequentially used apps Locally most used apps Context-aware prediction model - Android app AppKicker
  • 16. g ! ! ! ! Housekeeping ! ! How do people ! ! ! ! organize applications ! ! Discovering Multitasking on their phones?
  • 17. template matching 1 Screenshot Study 2 „most-used items should be on the first page, otherwise I try to group items (e.g., news outlets together)“ „most used apps first page, groups of apps 2nd space, then games“ ... grounded theory majority rule Quantitative data, e.g. - number of apps - number of folders - number of icons on page - x/y position of icons - 132 participants 1,486 screenshots Qualitative data - participants‘ experience levels - concepts of icon arrangement - participants labeled with concepts
  • 18. 5 Concepts for Arranging Icons 4.3.2 Results of Scree l l l l llll ll llll lll Usage-based icon arrangement =? Relatedness-based icon arrangement Usability-based icon arrangement ABC 123 ... (a) Usage-based Figure 4.5: Example sc their icons: (a) one part Aesthetics-based icon arrangement on the first screen”; (b [applications] by what would “keep third row a has created a checkerbo External concepts for icon arrangement alternates between blue
  • 19. 5 Concepts for Arranging Icons 4.3.2 Results of Screenshot Study l l l l llll ll llll lll Usage-based icon arrangement =? Relatedness-based icon arrangement Usability-based icon arrangement (a) Usage-based Aesthetics-based icon arrangement ABC 123 ... External concepts for (b) Relatedness-based Figure 4.5: Example screenshots of participa their icons: (a) one participant who reports to on the first screen”; (b) a user with five fol icon arrangement they do or what I us [applications] by what would “keep third row available for easy swip has created a checkerboard pattern: “most ico
  • 20. 5 Concepts for Arranging Icons l l l l llll ll llll lll 4.3.2 Results of Screenshot Study Usage-based icon arrangement =? Relatedness-based icon arrangement Usability-based icon arrangement Aesthetics-based icon arrangement (a) Usage-based ABC 123 ... External (b) Relatedness-based (c) Usability-based Figure 4.5: Example screenshots of participants who used certain c concepts for icon arrangement “put the most freque their icons: (a) one participant who reports to on the first screen”; (b) a user with five folders on his first page [applications] by what they do or what I use them for”; (c) a pa
  • 21. 5 Concepts for Arranging Icons l l l l llll ll Usage-based icon arrangement llll 4.3.2 Results of Screenshot Study lll 117 =? Relatedness-based icon arrangement Usability-based icon arrangement Aesthetics-based icon arrangement (a) Usage-based (b) Relatedness-based (c) Usability-based (d) Aesthetic-based ABC 123 External concepts for icon arrangement Figure 4.5: Example screenshots of participants who used certain concepts for arranging ... their icons: (a) one participant who reports to “put the most frequently used applications on the first screen”; (b) a user with five folders on his first page who tries “to group
  • 22. Occurrences of Concepts (2) (3) (4) (5) (1) usage-based 62 % 28 % 6 % 2 % 4 % (2) relatedness-based 28 % 60 % 6 % 3 % 3 % (3) usability based 6 % 6 % 9 % 2 % 0 % (4) aesthetic-based 2 % 3 % 2 % 5 % 0 % (5) external concepts 4 % 3 % 0 % 0 % 9 % % of participants using concepts (1) - Usage-based and relatedness-based most popular - People also apply hybrid concepts - Concept impacts icon layout - More apps on first page if usage-based More folders on first page if relatedness-based
  • 23. Grouping of Apps into Folders People cluster similar apps - Apps for sending text messages Dictionaries Music Games People cluster follow-up apps - Camera apps w/ photo editing apps Shopping apps w/ payment apps
  • 24. ng ! ! ! ! Multitasking What are the costs of multitasking between apps?
  • 25. Detecting Interruptions - Study based on data set of mobile app usage - Mining for interruptions within data set - Another application (self interruption) Incoming phone call (external interruption)
 
 ... time time app use ... ! ! ... ! app use interruption app use cont‘d ... ! app use - Duration of overhead app use overhead app use cont‘d time 41
  • 26. Findings phone call Daily interruptions (% usage) app switch 3.2 (2.2) 8.3 (5.3) Regular app runtime (s) 24.8 (31.8) per user 18.9 (24.4) per app Overhead duration (s) 43.2 (65.9) 34.4 (40.7) mean (SD) - Interruptions do not happen as often as expected - 8% of app use is interrupted by app switching 3% of app use is interrupted by phone calls - If interruptions happen, overhead may be exceedingly high
  • 27. No Evolution of Phone UIs - When phones became computers the design of phone UI did not change accordingly - Still only accept and decline button - Call application has superior status
  • 28. e calls can interrupt concurrent application use esign of call applications to allow for higher degree of multitasking ME esign Re-Design of Phone UIs CALLER NAME CALLER NAME b) Postponing calls c) Multiplexing d) Background notification - Extending the design space for phone call UIs Phone Call Applications - New interaction design for phone call handling - Support for better multitasking with call notifications Full-screen modal dialogs providing only options to accept or decline call s: Additional third option besides accept/decline to allow user to return to previous application lows user to keep attention in previous application while call is pending tifications: Puts incoming call into background for user to pickup call at will pp completion: Wait until task is done and display call when user leaves previous app Interruptions do not happen as often as expected!
  • 29. User using Maps app when call comes in Novel Phone Call Design - Application CallHeads - Extension of standard call app - Available on Google Play store - 45k users worldwide - Very positive feedback - People do passive decline
  • 30. Starting Points - Funf - Context logging framework - Easy to use with support for dropbox - http://www.funf.org ! - AWARE Framework - Standalone app and library - Open architecture, awesome team, good support! - http://www.awareframework.com ! - AppSensor (our project) - Focus on tracing mobile app usage - Basic code for building your own app - https://github.com/matboehmer/appsensor
  • 31. Conclusion - Insights from app usage sequences - Supporting people for finding icons Launching - Five concepts for arranging icons - Where do users place your app icon? Housekeeping - Attention to apps is highly fragmented - We propose novel phone call design Multitasking
  • 32. Helping with App Addictions - App addictions - App use can become problematic Habit forming: “Checking habit” - Android app AppDetox - People can set rules for app usage - App launches will be prohibited according to rules
  • 33. Thank you! Dr. Matthias Böhmer matthias.boehmer@dfki.de http://matthiasboehmer.de ! Deutsches Forschungszentrum 
 für Künstliche Intelligenz GmbH http://dfki.de
  • 34. Additional material - Böhmer, Krüger: A study on icon arrangement by smartphone users. In Proc. of CHI 2013 - Böhmer, Hecht, Schöning, Krüger, Bauer: Falling asleep with Angry Birds, Facebook and Kindle: a large scale study on mobile application usage. In Proc. of MobileHCI 2011 - Böhmer, Ganev, Krüger: AppFunnel: A framework for usage-centric evaluation of recommender systems that suggest mobile applications. In Proc. of IUI 2013 - Parate, Böhmer, Chu, Ganesan, Marlin: Practical prediction, prefetch, and prelaunch for faster access to applications on mobile phones. In Proc. of UbiComp 2013 - Böhmer, Bauer: Exploiting the icon arrangement on mobile devices as information source for context-awareness. In Proc. of MobileHCI 2010 - Leiva, Böhmer, Gehring, Krüger: Back to the app: the costs of mobile application interruptions. In Proc. of MobileHCI 2012 - Böhmer, Bauer: Improving the recommendation of mobile services by interpreting the user’s icon arrangement. In Proc. of MobileHCI 2009 - Böhmer, Prinz, Bauer: Contextualizing Mobile Applications for Context-aware Recommendation. In Adjunct Proceedings of Pervasive 2010 - Böhmer, Gehring, Hempel, Krüger: Revisiting Phone Call UIs for Multipurpose Mobile Phones. In Proc. of MobileHCI 2013 - Böhmer, Lander, Krüger. What’s in the apps for context? Extending a sensor for studying app usage to informing context-awareness. In Proc. of UbiMI 2013 - Löchtefeld, Böhmer, Ganev: AppDetox: Helping Users with Mobile App Addiction. In Proc. of MUM 2013. - ! Papers available on website: http://matthiasboehmer.de Data partly available on website: http://matthiasboehmer.de/data/
  • 35. Credits and icons - Rocket designed by Cris Dobbins from The Noun Project - Broom designed by Nick Green from The Noun Project - Lightning Bolt designed by daisy binks from The Noun Project - Magnifying Glass designed by Nadir Balcikli from The Noun Project - Clock designed by Nick Green from The Noun Project - Location designed by Ricardo Moreira from The Noun Project - Eye designed by Sergi Delgado from The Noun Project