UltraMemory Spaced Repetition vs Unfog
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
UltraMemory Spaced Repetition
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Flashcards that get harder as you get better. You already know spaced repetition works. You've built the habit, done the reviews โ and still drawn a blank when it mattered. The problem isn't you. It's the prompt. Traditional flashcard tools ask the same question every time. After enough repetitions, you're not recalling โ you're pattern-matching. The knowledge stays brittle. ultramemory fixes this. Each card evolves through five stages โ recognition, application, production, transfer, and synthesis. The question gets harder as your recall matures. Once two concepts are truly owned, the system finds the connection between them and asks the question that bridges them. That's where real mastery is built. Capture is one tap. The AI handles the prompt, the stage, the schedule. You just show up. No streaks. No guilt trips. No gamification. When you miss a day, the queue waits โ honestly, without comment. Progress is shown, not celebrated. ultramemory is for: - Power users who find Anki too rigid - Non-native speakers who need words truly retrievable, not just familiar - Serious readers tired of losing a book three weeks after finishing it - Professionals who rely on frameworks and have felt the embarrassment of not retrieving one in the room A tool for the mind that compounds for years. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Unfog
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Stop rereading the same chapter and hoping it sticks. Unfog turns lectures, PDFs, and videos into real understanding โ you explain in your own words, and the app shows exactly what still needs work. The Feynman method, built for your phone: add material, explain it simply (as if to a friend), get honest feedback on gaps, then revise with quizzes, flashcards, and mind maps. WHAT YOU GET โธ Learn by explaining โ voice or typed answers โธ Honest gap feedback โ strengths and weak spots, so revision stays focused โธ Smart notes โ clear summaries from your source material โธ Quizzes and flashcards โ generated from your topic, in your language โธ Mind maps โ see how ideas connect at a glance โธ Many sources, one place โ PDFs, scans, recordings, YouTube, links, pasted text โธ Shared study spaces โ revise with others, like a group session before exams โธ Built for real sessions โ mobile-first, dark mode, English and Polish HOW IT WORKS 1. Add material โ a chapter, lecture, or lesson 2. Read smart notes to get oriented 3. Explain it simply, as if to a friend 4. Identify gaps and retry until it sticks 5. Revise with quizzes, flashcards, and mind maps Whether you are preparing for exams, learning a new skill, or revising after a meeting, the loop stays simple: capture โ explain โ fix gaps โ revise. Unfog Pro unlocks full access to study features. Download Unfog and find out whether you truly understand what you just read. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is device support: UltraMemory Spaced Repetition at 3 against Unfog's 1. UltraMemory Spaced Repetition also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. UltraMemory Spaced Repetition sells 2 in-app purchases, starting at $12.99 per month and Unfog sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.
UltraMemory Spaced Repetition ships an update every 4 days, Unfog every 2 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.
| Parameter | UltraMemory Spaced Repetition | Unfog |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days | Every 2 days โ better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod โ better | iPhone |
| Requires iOS | 15.1 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 65 MB | 80 MB |
| Age rating | 4+ | 4+ |
| Developer | Joel Lovera | BITSEC SP. Z O.O. |
In-app purchases
UltraMemory Spaced Repetition
- Pro Monthly$12.991 Month
- Pro$99.991 Year
Unfog
- Unfog weekly$2.997 Days
- Unfog Monthly1 Month trial$17.991 Month
- Unfog Annual$29.991 Year
Questions
Is UltraMemory Spaced Repetition free?
Is Unfog free?
Do UltraMemory Spaced Repetition or Unfog have ads?
Which is updated more often, UltraMemory Spaced Repetition or Unfog?
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