Cobalt vs Sequencer 02
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cobalt
This app transforms global bestsellers into concise 5, 10, or 15-minute summaries. It uses AI to customize summaries based on your preferences, offering actionable, scientific, or key takeaway formats. Access an elite library of over 300 titles across business, psychology, and biographies, with offline reading capabilities.
- Custom AI summaries
- Actionable, Scientific, Key Takeaways formats
- Elite library of 300+ titles
- Business, Psychology, Biography categories
- Offline reading mode
- Reduced eye strain interface
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No time to read? Stop feeling guilty about your unread book pile. Cobalt turns global bestsellers (Business, Psychology, Finance) into powerful 5, 10, or 15-minute summaries. WHY CHOOSE COBALT? While other apps force a standard summary on you, Cobalt uses cutting-edge AI to adapt to YOUR brain. [+] EXCLUSIVE: CUSTOM AI SUMMARIES Tired of generic or shallow summaries? - Want practical steps? Ask for an "Actionable" summary. - Want the theory? Ask for a "Scientific" summary. - Want the basics? Ask for "Key Takeaways". You decide the structure. It is unique in the world. [+] AN ELITE LIBRARY (300+ TITLES) No fluff. Only books that change lives: - Business: Rich Dad Poor Dad, The 4-Hour Workweek... - Psychology: Atomic Habits, The Four Agreements... - Biographies: Elon Musk, Steve Jobs... [+] LEARN ANYWHERE On the subway, during a coffee break, or before bed. Our reading interface is designed to reduce eye strain. Offline mode included to read without data. LAUNCH OFFER Download Cobalt now to turn every spare moment into a learning opportunity.
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 Cobalt's 10. On price, update cadence, ads and device support 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. Cobalt sells 10 in-app purchases, starting at $2.99 per month. Sequencer 02 asks for nothing beyond the download.
Cobalt ships an update weekly, Sequencer 02 every 6 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.
| Parameter | Cobalt | Sequencer 02 |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Weekly | Every 6 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 132 MB | 18 MB |
| Age rating | 4+ | +4 |
| Developer | Theo Rousseau | Francois Fouqueau |
In-app purchases
Cobalt
- Abonnement Mensuel (-40%)$2.991 Month
- Weekly Premium subscription.$3.997 Days
- Abonnement Annuel (-40%)$29.991 Year
- Parcours Vitalité & Santé$3.99
- Moment Présent$3.99
- Sport & Performance$3.99
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- Mindset & Psychologie$3.99
- Entrepreneuriat & Business$3.99
- Pack Complet - Tous Parcours$22.99
- Cobalt Lifetime$99.99
Sequencer 02
No in-app purchases









