ZenCards vs Unfog
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ZenCards
Study flashcards hands-free using voice commands or traditional silent mode. This app utilizes spaced repetition for effective long-term memory retention, ideal for exams and certifications.
- Hands-free study using voice commands
- Silent study mode
- Spaced repetition scheduling
- Support for math equations and images
- Create, edit, and organize decks
- Sync decks across devices
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ZenCards is a modern flashcard app built for hands-free, distraction-free studying. ZenCards is free to download. Access to ZenCards Pro features requires a monthly auto-renewing subscription (3-day free trial available for eligible new subscribers). Study with your phone in your pocket and earbuds in using voice commands, or switch to silent mode for traditional flashcard review. ZenCards uses spaced repetition scheduling to show cards at the right time for long-term memory retention. Whether you're preparing for exams, professional certifications, or daily learning, ZenCards helps you study efficiently anywhere — walking, commuting, or relaxing. --- Why ZenCards ZenCards combines voice-controlled studying with science-based memory techniques so you can learn faster without being glued to your screen. Perfect for: • Students preparing for exams • Medical, law, and professional certifications • Language learning • Busy professionals reviewing material on the go --- Key Features (ZenCards Pro) • Hands-free study using voice commands • Silent study mode for traditional flashcard review • Spaced repetition scheduling for long-term retention • Support for math equations (LaTeX) and images inside cards • Create, edit, and organize decks easily • Sync decks and progress across devices • Study-ahead mode to review additional cards anytime Note: A ZenCards Pro subscription is required to access the full ZenCards experience. --- Subscription Information ZenCards Pro is an auto-renewable monthly subscription. • Free trial: 3 days (available to eligible new subscribers) • Subscription length: Monthly • Price: Varies by region • Payment will be charged to your Apple ID account at confirmation of purchase • Subscription automatically renews unless canceled at least 24 hours before the end of the current period • Your account will be charged for renewal within 24 hours prior to the end of the current period • You can manage or cancel your subscription anytime in your Apple ID account settings --- Privacy & Data Use Microphone access is used only to enable voice-based study commands. ZenCards does not record conversations or store audio data. --- Legal Privacy Policy: https://zencardstudy.com/privacy Terms of Use (EULA): 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 — 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 ▸ Learn by explaining — voice or typed answers ▸ Honest gap feedback — strengths and weak spots, so revision stays focused ▸ Smart notes — clear summaries from your source material ▸ Quizzes and flashcards — generated from your topic, in your language ▸ Mind maps — see how ideas connect at a glance ▸ Many sources, one place — PDFs, scans, recordings, YouTube, links, pasted text ▸ Shared study spaces — revise with others, like a group session before exams ▸ Built for real sessions — mobile-first, dark mode, English and Polish HOW IT WORKS 1. Add material — 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 → explain → fix gaps → 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: ZenCards at 3 against Unfog's 1. ZenCards also leads on iOS requirement (15.6 vs 17.0). On price, update cadence, ads and in-app purchases 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. ZenCards sells 1 in-app purchase, 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.
ZenCards ships an update every 4 days, Unfog every 2 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.
| Parameter | ZenCards | Unfog |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 4 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 11 MB | 80 MB |
| Age rating | 4+ | 4+ |
| Developer | Josh Tickner | BITSEC SP. Z O.O. |
In-app purchases
ZenCards
- ZenCards Pro3 Days trial$12.991 Month
Unfog
- Unfog weekly$2.997 Days
- Unfog Monthly1 Month trial$17.991 Month
- Unfog Annual$29.991 Year









