Hi,
I also created my own app for the camera department for Android on Google Play and all Kindle Fires on the Amazon Appstore. I couldn't find an app for a camera log, so I created one. Since I started, it has evolved into more than a camera log and now includes more tools and references for DPs, ACs, DITs, operators, and even gaffers. I'm still testing new features, so I can give you a free copy if you message me. Let me know what you think!
Android Market/Google Play
Amazon Kindle