SubMOA is a mobile app designed for shooting sports enthusiasts, especially precision rifle shooters. Features: 1. Use phone's back camera capture properly scaled target pictures 2. Allow pick target picture from device library 3. Allow manually set actual size on target picture 4. Allow re-analysis target 5. Calculate group size, point of impact by analyzing target picture 6. Generate analyzed target pictures for record keeping and easy sharing 7. Record equipment setup along with the target pictures 8. Record shooting conditions such as temperature, wind condition 9. Manage the records of shooting results 10. Share the target picture from Camera Roll 11. Allow analyze and record multiple groups on the same target 12. Allow user change font size of labels 13. Support metric system 14. Allow user select MOA or MIL as accuracy unit. 15. Calculate group mean radius 16. Allow user attach equipment picture on target