I'm a big fan of book summaries and tried already frew of such services.
Also I've bought 12min LTD on another platform so can't leave a review here.

But I'd like to say that after 6 months this has become one of the few apps that I'm using now on a daily basis. I have cancelled Blinkist's subscription + refunded Readitforme (another AS current deal).

The mobile app is ok (I prefer much more Blinkist's one), but where 12min shines is the spectrum of voices they use. I usually listen at 1.5-2x speed, and their voices are 9 out 10 times v. vivid, sound clear and are easily understandable.
Can't say the same even about Blinkist's or Readitforme's - theirs sound often really poor in comparison.

What I like about 12min:
- voices (!)
- daily suggestions
- daily and weekly goals
- better speed control - you can choose desired speed from dropdown menu vs tapping and tapping and tapping (Blinkist)

What I dislike:
- Android app often hangs when trying to open, I need sometimes to open it multiple times in order to make it work
- app's visual aspects are much less atractive than Blinkist's
- their book cover pictures are less atractive as well

All in all - please make sure the app is loading more smoothly and maybe upgrade a bit your branding!
And bring more and more of these great summaries like you're doing so far!