A and B have the app

A buys his/her license, which grants them the ability to pay for additional licenses that they can then share with specifically assigned phone numbers/device ids/Play/Apple id’s. To curb the obvious piracy attempts, if the kid gets a new number/device, they keep their license if they keep the same device/number. New device and number? You buy a new license.

It’s not really gifting and it would actually allow for the creation of a more social element, perhaps opening the door to create small networks of users.

You can even tack on a premium (I dunno, $1.99?) to allows for the purchase of additional licenses at, say, 79 cents. You could even allow for different premium tiers that would allow for a finite number of license purchases under that tier.

I.e, $1.99 allows for, say, 5 licenses to be purchased at .79 cents, $2.99 allows for 12 purchases, and $4.99 allows for 20.

This would also help open up high school and jr high markets, where parents would generally be the primary purchasers.