Prometheas Technologies
All workHealthcare · Mobile · Data & AI · Cloud

Mirai

A mobile wellness companion that grew into a daily habit

+164%
D30 retention
2.6×
Sessions / user
12 wks
Embedded pod
Problem

Mirai's launch app had strong onboarding but collapsing D30 retention. The team suspected the daily check-in flow was too long, but didn't have the data pipeline to prove it or the mobile bandwidth to iterate.

Approach

Rebuilt the check-in flow in SwiftUI + Jetpack Compose with an experimentation layer, shipped an event pipeline into BigQuery, and added a Claude-powered summary feature that turned a week of journaling into a single coaching insight. Three-month embedded pod.

Outcome

D30 retention moved from 14% to 37% over two releases. The AI summary feature became the most-used weekly surface, and the team picked up the experimentation discipline to run the next iterations without us.

We came for a mobile rebuild and left with an experimentation habit. That's the part we couldn't have bought on its own.
NKNadia KoenigHead of Product, Mirai

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