Every time I open this app it crashes. I haven't been able to use it at all, beyond subscribing to a podcast.

Easy to pick up and play for a few minutes or for an hour. Multiple levels of challenge, with hints if you need them. Earth sphere provides good perspective on shape & location of the continents. Beautiful graphics.

I've been collecting lightning photos for my iPhone wallpapers, and this app is a good source for a variety of images - some are common, some unique, and a few are spectacular.

Amateurish design riding on social-networking vehicle. I used this app off/on for a few weeks. Required signup & login. Interface for that was a cumbersome, sloppy design; the process was painful. In using the app to track workouts: Reports and mapping were erratic, app would not work with iPhone in pocket (or in hand if passing thru partial shade), app lost/dropped workouts, etc. I had intended to use the suite of MapMyFitness apps for various workouts (bike, walk, hike). Or not. Other apps are much more user-friendly & functional.

I've tried several of the texting apps & have found this one serves at least as well as my prior favorites - only without the irritating glitches the others had. I like this app - I hope they can keep it this reliable and simple.