I don't get why you need to make that thing a sleeve. I wouldn't buy it because basically it'd make my phone unusable while I charged it. Make it have a transparent front, or a removable front, and maybe it's worth it.
I frankly don't see the point in it, and frankly having an app that "optimizes my charging experience" is something I dont see as something I need or want, I want my phone to charge and installing an app so I get better charging (in some way I don't understand or even see how it's possible) is something I want to avoid, not look upon as a unique selling proposition.
You are competing with $5 power banks here, at least in my mind, and I really don't see something here that makes me want to spend the money I can see this costing just so I can charge my phone wirelessly while it's in my bag.
I'm not being negative here, I'm being honest and since you're probably going to be investing some of your money here, I hope you don't take this the wrong way. Make it modular, with different sleeves you can buy for your phone, make it possible to use it as a power bank for non-qi devices and you have something interesting *for me*.
Good luck at any rate.