Retain vs Sequencer 02
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Retain
This minimalist flashcard app uses AI to help you create and study. Its intelligent spaced repetition algorithm optimizes review intervals for efficient learning and rapid progress. Choose from different card layouts to keep your study sessions engaging.
- AI-generated flashcards
- Customizable card layouts
- Spaced repetition algorithm
- Minimalist design
- Progress tracking
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A beautifully minimalist flashcard app designed with simplicity and efficiency in mind. Create your own flashcards, or let AI generate them for you. Choose between two different card layouts that keep your learning fresh and engaging. And with our intelligent spaced repetition algorithm, you'll review your cards at optimal intervals, ensuring maximum retention and rapid progress.
Sequencer 02
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Sequencer02 is a small music sequencer for composing your own loop: a 4-bar pattern (32 eighth notes) with piano, bass and drums. Pick an eighth note in the grid, then lay down a piano note, a bass position or a drum (hi-hat, snare, kick). Press Play to hear your groove loop round, and set the tempo as you like. Three instruments: piano, bass (bass guitar neck) and drums. A set chord grid to practise placing the right notes. Score and mark out of 10: notes that belong to the chord, steady drums and a groove that really "turns" earn points — ideal for working on rhythm and harmony. Note names as you like, in French (do re mi) or in English (a b c), sharps or flats (C / D). Real sounds, gentle feedback, sound and vibration settings, built-in tutorial. Perfect for a first taste of composition, rhythm and note reading in music lessons, in music theory classes, at music school or at a conservatoire — or simply for the pleasure of inventing a piece. Completely free, with no advertising and no in-app purchases. Part of the Lusique collection of music games.
Screenshots
Verdict
The clearest difference is in-app purchases: Sequencer 02 at none against Retain's 2. Sequencer 02 also leads on update cadence (every 6 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Retain sells 2 in-app purchases, starting at $4.99 per month. Sequencer 02 asks for nothing beyond the download.
Retain ships an update every 3 weeks, Sequencer 02 every 6 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.
| Parameter | Retain | Sequencer 02 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | — |
| Positive reviews | 88.9% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 3 weeks | Every 6 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 54 MB | 18 MB |
| Age rating | 4+ | +4 |
| Developer | Paul Evans | Francois Fouqueau |
In-app purchases
Retain
- Premium Monthly$4.991 Month
- Premium Yearly$29.991 Year
Sequencer 02
No in-app purchases
