[folli]

Thanks for the encouraging words! I think Sun Surveyor is undisputed the top app in the space. It's really quite an instructive and interesting process to publish an app, try your hands at marketing, answer requests, work around at intricacies of different Android versions and device models. Coming from a background in academia and research, it's very fulfilling to see your app (even though it's comparatively simple) used by hundreds of people.

Regarding IAP: I'm not using in-app purchases. At the beginning I thought it to be too much of an effort to implement and now it's too late. So there are two separate apps available, the free version (shows data only for the current day) and the paid version (shows data for any day). I think this is similar to your app(?). I thought it would be easier to get users to try a free app and than upgrade instead of having to buy a paid app without getting to test the app beforehand. However the rate of people buying the pro version is rather low (around 3-4% of Lite users purchase the Pro version; I don't know what your experience is?)

Send me an email ([e-mail]) to compare notes, I'm definitely interested!