Loop Revision vs Retain
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Loop Revision
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Revision Loop helps you remember what you study by turning your notes, photos, and PDFs into a spaced revision schedule. Upload once on Day 0, revise on the days that matter, and build long-term memory without last-minute cramming. Remember more. Forget less. HOW IT WORKS • Upload study material — snap a page, import images or PDFs, or type text notes • Save a topic with subject and tags for easy search later • Revision Loop schedules reviews on Day 1, Day 3, Day 7, Day 14, Day 28, Day 55, then every 30 days • Open the Revise tab to see what’s due today, catch up on missed work, or resume incomplete sessions • Mark revisions complete or incomplete — your schedule adapts as you go STUDY YOUR WAY • Camera — handwritten notes and textbook pages • Gallery — screenshots and saved images • PDF — documents and slides • Text notes — paste or type directly in the app STAY ORGANIZED • Library with search by topic, subject, or tag • See your full revision timeline for each topic • Add more materials anytime and start a new revision loop when you need a fresh schedule REMINDERS • Set a daily reminder time so you don’t miss revision day • Snooze a revision when you need more time — your loop stays intact Revision Loop Plus (optional subscription) • First 2 topics are free on your device • Plus unlocks unlimited local topics • Loop Scholar and Loop Pro add optional cloud backup and sync across devices Built for students, exam prep, and anyone who wants science-backed spaced repetition in a simple, focused app. Privacy: your study topics stay on your device unless you choose cloud backup with a Scholar or Pro plan. ▸ Plans • Free: first 2 topics on this device (no purchase required) • Revision Loop Plus: unlimited topics — requires a paid monthly auto-renewable subscription (in-app purchase via the App Store) • Optional cloud backup: Loop Scholar or Loop Pro — separate paid monthly auto-renewable subscriptions Payment is charged to your Apple ID. Subscriptions renew automatically unless cancelled in App Store account settings at least 24 hours before the period ends. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Retain
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Retain: Revision Tracker helps you keep track of what you’ve learned and remember when it’s time to review it again. After studying a topic, tell Retain how well you remembered it. Retain uses your feedback to plan your next review, so you don’t have to remember what to revise or when to revise it. See everything you’ve learned, track your progress, and keep moving forward without having to keep it all in your head. WHAT YOU GET • Keep track of everything you’ve learned • Rate how well you remembered each topic • Retain plans your next review for you • See which topics are coming up for review • Track your learning progress over time • Look back and see everything you’ve accomplished Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Retain at none against Loop Revision's 3. Loop Revision's advantage is device support (3 vs 1). On price, ads 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. Loop Revision sells 3 in-app purchases, starting at $4.99 per month. Retain asks for nothing beyond the download.
| Parameter | Loop Revision | Retain |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 16.4 |
| Further details — not scored | ||
| Size | 41 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Sixmaiti Debbarma | HonestyVision |
In-app purchases
Loop Revision
- Revision Loop Plus$4.991 Month
- Loop Scholar$9.991 Month
- Loop Pro$19.991 Month
Retain
No in-app purchases








