Some additional info:
The app is in a form of stories catalogue. Stories themselves are presented in a form of a messenger where player receives messages from NPCs - texts, images, voice messages, even calls (fake calls, obviously. So this is a (mostly) dialogue-driven interactive narrative, choices may affect the story outcome, depends on writer's talent.
Target audience (as we see it) is young women 20-35. But we can be mistaken here.
The app was published several months ago. We have 3 stories published in it so far and more are in the works. The stories and players progress are hosted on a server (so it's a client-server app). So yeah, we see each player's progress, who made which choice, etc. The app and server-side are developed completely in-house. Not third-party engines, nothing like that.
There is an in-game currency - gems. Currently they can be spent only on some paid dialogue branches. The game itself is free. The stories can be completed for free also.