LogBook
LogBook measures rifle groups from a photograph. You print a target sheet from the app, shoot it, and photograph it with your phone. The app straightens the image, finds the bullet holes, and reports the group size in inches and MOA, the mean radius, and the scope correction in clicks.
Each result is stored with the rifle, the load and lot, and the conditions that produced it.
For iPhone. In development, not yet on the App Store.