# Which Duolingo retention experiments made habit loops stronger?

Author: Ali Abouelatta
Source date: 2023-02-06
Tags: retention, gamification, habit formation, onboarding
HTML: https://lazyweb.com/research/duolingo-retention-experiments
Markdown: https://lazyweb.com/research/duolingo-retention-experiments.md

## Primary visual

Local image URL: https://lazyweb.com/research-assets/duolingo-retention-experiments/01-duo-widget.png
Original image URL: https://pbs.twimg.com/media/FoSnMynXoAAh8Vb.png
Alt text: Duolingo widget experiment showing Duo as a reminder outside the app.
Image description: A Duolingo widget makes Duo visible outside the app so the lesson reminder becomes more emotional and harder to ignore.

Short answer: Ali identified four Duolingo retention experiments from 2022: widgets that change mood when you skip lessons, special streak app icons, goal-commitment copy, and Perfect Streak Week. Each experiment made progress, identity, or commitment more visible at the moment users were likely to act.

## Evidence

The visuals show retention mechanics that make the habit loop visible outside the core lesson: widgets, app icons, commitment copy, and perfection badges.

## What changed

- Widgets acted like a live reminder channel when a user had not done a lesson.
- A special app icon turned a 30-day streak into a visible identity marker.
- Goal copy shifted from passive continuation to explicit commitment.
- Perfect Streak Week created a higher-status reward for doing every daily lesson.

## Why it matters

- Retention mechanics become stronger when they live where users make decisions, not only inside the product.
- Habit loops can be reinforced through visible status, commitment language, and celebration of extra effort.

## Sources

- [1] Lazyweb Research: Duolingo retention experiments. The thread says Duolingo ran hundreds of experiments in 2022 and names four that were big for retention. [Source](https://threadreaderapp.com/thread/1622605665343533056.html)