Gun Locker app for iPhone and iPad

Gun Locker is a one-stop-shop for all your gun organizing needs. Utilizing a card-file system, you can track what you have bought, the related maintenance logs and dope tables for each weapon. With the NFA switch turned on in Settings, you can enter your firearms progress through the stamp process.
Useful calculators are handy and quickly give you the information you need whether you are in the field or at the reloading press.
You can create ballistic profiles for your firearms and calculate dope tables using different bullet types and weather information. All configurable through yards/meters and MIL/MOA. In addition, a whiz wheel with a day or night mode gives you a quick fix on a target.
A logbook gives you the ability to track both your magazines and ammunition, including purchase date and price.