I just released this a few days ago. It's my first attempt at making an app.
Decipher is a cryptography app. Currently just supports encoding/decoding a few basic ciphers as well as basic frequency analysis. Working on adding automatic cipher cracking as we speak.
I've made a big effort to make the interface optimised for tablets whilst still working on smaller screens. I'd love if I could get some feedback on the UI, and also if people find any bugs on different devices. (I only have a nexus 10 and emulators to test it on!)
Thanks all, you can get it on the Play Store here: https://play.google.com/store/apps/details?id=com.discoviking.cipher.project