Marketers develop campaigns for multiple audiences. (I typed that while I was having trouble sleeping, and should have said campaign, not product.) This particular campaign is directed towards an audience that's not you. In future, they might have a different one that is better suited for you.
The core product is a Bluetooth-enabled gyroscope. You mount it to your firearm and pair it with your phone. You then run dry practice drills with it, and it measures the movement of your muzzle.
The app provides feedback about that movement in the time immediately surrounding your break of the trigger. Their proprietary algorithm offers a guess on what you could do to improve. You can save this results and track your progress over time.
It looks like they've added features to the software. Now, if you use a laser and point the camera of your phone at your target, it can also report where your shot hit on your target.
Some versions can work with live fire, too. They also have products that are specifically designed to support training with the AR15.
As a training aid, it
can be mighty handy. Or, like
@Supermoto said, you
can simply learn to call your shots
for free. The question of whether it provides benefit is a personal one: will using it help you do more, productive training? If yes, great; if no, save your money for something that will - like ammo and classes.