[FREE APP] Swiss Army App

I would like to get the valuable feedback from some experienced Android developers. This is my first app so I know there is a lot to learn, so any criticism or enhancement ideas would be greatly appreciated.

Swiss Army App aims to be a useful app that you can turn to. I’ve tried to include small apps I commonly need and wrap them in one app, hence the name. So far the app has:

Translator
Unit conversions (height, weight etc)
Torch
Bill splitter
Stopwatch

You can download for free here

https://play.google.com/store/apps/details?id=com.rory.android.swissarmyapp

Enjoy!