So now you have published your app on the Play Store. You certainly have some bugs to fix, and features to refine. And then, what? How do you transform your app into something really, really great? This talk is all about this: making your app astonishing. Based on simple Interaction design principles, you'll discover how to make your app considerate and smart, and bring it to the next level. From search to machine learning, from social networks to common UX hints, it contains everything your app needs to become amazing!

1. From Nice to Astonishing
De (presque) zéro à héros

2. About me
Quentin Sallat
Développeur Androidà iD.apps
@Aerilys

3. John has just published his new app

4. He fixes some annoying bugs

5. Add some minor improvements

6. And then…What’snext?

7. Nice

8. Astonishing!

9. Ma mission
«Ensebasantsurquelquesnotions simplesd’Interaction design,vousdonner
despistes pourrendrevotreapplication meilleure»

10. Make your app the user best friend

11. Make your appthe user best friend
«Softwareshouldbehavelikeaconsideratehuman
being»
 About Face

12. «Jevoudraisêtreconsidéréentantquetel»

13. Make your app the user best friend
 It’s not harder to makea considerate app!
 Take an interest
 Use common sense
 Self-confident

14. It’s not harder to make a considerate app
 Know your users
 Communicate with them using their language and idioms
 Be clear and direct
 Don’t stop the proceeding!

15. Take responsability
 Stop asking the user about every action
 If you fail to do something, try to fix it.
 Take decisions, but allow the user to have the final word

16. Mostlyright, mostof the time
 What’s best?
 80%best scenario, 20% worst?
 Bother users 80% of the time for a 20% probability scenario?
 Use the power of UNDO!

17. KISS

18. KISS
 Keep It Simple and Stupid
 Right information at the right moment
 Don’t bother the user with a complicated UI
 Use a « mostly right » default configuration

19. Too much stuff!

20. Muzei

21. Guess what the user would do next

22. Guess what the user woulddo next
 Learn from your users
 Observe them in real situations
 Use tools like Google Analytics
 Machine Learning
 Eat your own food!
 Use the Cloud!

23. Chrome Custom tab
 Custom look
 Browser pre-warming in background
 DNS resolution
 HTTPS/TLS negotiation

24. Smart apps
 Put idle cycles to work (Google Keep, GCM)
 Have a memory
Smart apps

25. Putidle cyclesto work
 Synchronize data in background
 Preserve battery and data quota
 Use GcmTaskService to be smart!
Network type
Battery
Time/interval

26. Have a memory
«Ifit’sworth theuserentering, it’sworth the application remembering »
 Remember choices and defaults
 Remember patterns
 Remember past entered data
 Use Shared Preferences for example

27. Improve your appsearch engine
 Keep recent search queries
History clearing option
 Multiple criterias when possible : places, people, date…
 You know the user: give him personnalized suggestions
 Contextual suggestions : location, time…

28. Failgracefully

29. Failgracefully
1. Have nice error messages
2. Crashlytics (Fabric) / ACRA
3. Thread.UncaughtExceptionHandler

30. Don’t burden the user with personal problems

31. Error message : the right way
1. Don’t be sorry
2. Explain the error in common terms
3. Offer a solution
 Be short and clear
 Be as less technical as possible

32. There is only one king

34. Among the best
 YES, design is hard, Good design is harder
 YES, you have to think hard to create a great app
 YES, it requires great skills

35. Conclusion
 Creating an app takes time
 Creating an astonishing app takes A LOT of time
 All apps are not meantto be great

36. Quelques liens
 About Face –by Alan Cooper
 Material Design specs
 MaterialUp

37. @Aerilys
https://github.com/neferetheka
iD.apps
http://www.id-apps.fr
http://blog.id-apps.info
@iD_apps
Quentin SALLAT