During development I have come across some apps which are very helpful and worth sharing with the community.
Here are some of the apps with screenshot that I use from time to time.
Keyline Pushing
Great app which shows overlay of grids to help designers follow material design standards. [Get it from Google Play]




Developer Tools
Sometimes, you just need very simple tool to get information about your device and screen density information. “Developer Tools” app just does that. [Get it from Google Play]



Developer Tools Screenshot
Pixel Ruler
When working with designer spec, sometimes it’s hard to measure dimensions by looking at the screen. Pixel Ruler gives you perfect tool to get dimensions. [Get it from Google Play]


Pixel Ruler Screenshots
Show Java
Sometimes I need to validate some values that are in built APK after release. For example, debug mode is NOT on, or version number is correct from CI build and so on. “Show Java” is a perfect app to decompile app with surprisingly accurate reconstruction of both Java source and XML resource files. Previously I used to use Dexplorer, but now I am not looking back. Bought the pro version to support developer. [Get it from Google Play]




I’ll try to keep this page updated as I find more useful applications. Let me know what you guys use on day to day basis.