secured DB - http://sqlcipher.net/
Nokia X - (surprise me ) - run android 4.1.2 without the google services such as map , very easy to port app to nokia X - almost compatible .
Indie Development :
- use cloud services - AWS , google engine,,, avoid your own server if possible
- release version asap
- translate it to 7 language - increase download by 30%
- remove unused features
- add rate us - button
- app name - make it sense
- add share button
- add seo + facebook page + google plus with your app name
- extreanl links to your downlaod page
- in app - is the best for getting money or interstitial ads.
- add analytics such as google or flurry .
animated ui frameworks