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Consumer app Reading habit app · iOS / Android

Lettore

Lettore wanted a reading app people actually came back to. We built the AI backbone, the full backend, and the activation and retention loops that turn a first session into a habit.

AI backbone Backend architecture Activation loops Retention

The situation

Reading habit apps live or die on whether a user opens them tomorrow. Lettore came in with a clear product vision and zero infrastructure. They needed an AI layer that personalised recommendations without feeling generic, a backend that could carry the product through scale, and onboarding and retention loops that turned signups into a habit by week four.

What we did

1. AI backbone

The personalisation and recommendation engine sits at the centre of the experience. We designed the service so that recommendations get sharper with every session, surface the right book at the right moment, and never feel like a generic feed. The AI doesn’t just rank, it remembers what kind of reader you are.

2. Entire application backend

Data model, services, APIs, the lot. We treated the backend as a long-term asset, not a hack to ship. Clear separation between identity, content, reading state, and behavioural signal. Everything the team needs to ship the next ten features is there.

3. Activation & retention loops

First session: discover three books in under 60 seconds. First week: build a reading streak that the AI rewards. Month two: the habit is on autopilot. We mapped the loop end-to-end, instrumented it, and built the product around it.

Outcome

AI + Backend Designed and built end-to-end
Stickier Activation → week-4 retention
Ready Backend ready for next ten features

Scope at a glance

  • AI services. Personalisation engine, recommendation ranking, reader profiling.
  • Backend. Data model, services, APIs, identity, content, behavioural signal.
  • Loops. First-session discovery, week-one streak, month-two habit.
  • Instrumentation. Every step of the loop measurable from day one.

Same lens. Your system. €5k fixed audit.

40 hours of senior practitioner work. Read-only access. Full documentation, 90-day roadmap, 2-hour walkthrough. Whether you keep us on or not is your call.