I have a couple of comments to add before the debut of the hearing aid function. First, I'm aware of several detriments to the use of APP2 as hearing aids, such as vanity and perception issues (the obvious presence of a hearing device which has a common use mostly unrelated to hearing health) and the fact that adjustments for outside use under windy conditions, for example, may be significantly difficult. But I think the benefits of cost and adjustability compared to those particular features for high priced hearing aids (such as the Miracle-ear units I purchased a couple of years ago) will be appealing, even game changing.
One observation that I've made which probably won't apply to most users, is that the microphone of APP2 doesn't distort when I play my musical instrument (a wind instrument that tends to be pretty loud for indoor listening). That occurs for my pair of Miracle-ear Energy 5 as well as all other hearing aids I've ever tried, and I tried several before deciding on Miracle-ear (which does provide a robust benefit for my significant hearing impairment). For me, that alone makes the use of APP2 as hearing aids an attractive prospect. There's a possibility that such a feature is available for the Miracle-ear product, but I wouldn't have thought about asking for it had I not been so impressed by recent improvements to the transparency feature already available for APP2.