i vs Memorize
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
i
This app allows users to hide text in study materials using a filter, mimicking a red sheet for effective memorization. It supports photos and PDFs, enabling studying anytime, anywhere with just a smartphone.
- Hide text with red filter effect
- Study photos and PDFs
- Add check marks for progress
- Efficient study with navigation
- Use anytime, anywhere
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【Ranked #1 in the Education category (free)】 【Over 1 million downloads】 Featured in various media: ・Fuji TV "Minna no News (2017/2/9)": Red-sheet generation stunned! A revolution in memorization methods ・Benesse Manapla: Make high school life even more fun! 3 useful apps ・Nikkei Trendy Net "TODA Satoru’s Deep-Dive Report on Gadgets": How working adults use iPad and handwriting apps for learning i-Memorization Sheet is an app for memorization study that hides words, sentences, dates, etc. using a filter so you can study them. The app uses image analysis to reproduce the same effect as using a real red filter. Therefore, red text in reference books can be hidden simply by photographing it. You can also import entire reference books by converting them to PDF. With just an iPhone, you can study anytime, anywhere. 【Benefits of i-Memorization Sheet】 - Study anytime, anywhere—e.g., easily memorize with one hand on the train. - Carry as many pages as you want just by bringing your smartphone. - Disappears better than real red sheets. All reddish colors are hidden. Green is fine if it's a fluorescent highlighter. - You can add check marks anywhere. Double-tap where you want to place a mark. There is also a function to jump to the next check mark, making studying very efficient. 【Supported materials】 - Photos and PDFs can be used. 【Pricing】 You can use the app for free for up to 10 pages in total. If you want to use more files/pages, please purchase an add-on. Ads are displayed, but purchasing the add-on can disable them.
Memorize
Enhance your studies with a minimalist interface for efficient learning. Organize subjects into decks, track progress with notes and feedback, and visualize study habits. Set reminders and sync across devices for a seamless academic journey.
- Minimalist interface
- Subject-based decks
- Learning journal with notes
- Study habit visualization
- Customizable reminders
- Cross-device syncing
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Memorize - Elevate Your Learning Journey! Efficient Tools: Navigate through a minimalist interface designed for efficient and organized studying. Structured Learning: Personalize your study experience with subject-based decks for a streamlined approach. Knowledge Chronicle: Record your learning moments with dates, notes, and real-time feedback. Relive your academic journey. Insightful Learning Trends: Visualize your study habits, set goals, and enhance your learning experience with insightful trends. Study Reminders: Stay on track with gentle nudges, capturing progress and reflections on your academic endeavors. Seamless Across Devices: Switch seamlessly between iPhone, iPad, and Mac, maintaining harmony in your learning materials. Memorize+: Unlock advanced features with unlimited flashcards, enhanced organization, and customized learning experiences. Your learning journey, simply enhanced. Download Memorize now! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: Memorize at none against i's shown. Memorize also leads on rating (4.5 vs 4.2) and device support (4 vs 2). i's advantage is update cadence (every 6 days vs every 3 weeks). On price, review sentiment, ratings volume 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. i sells 10 one-off in-app purchases and Memorize sells 5 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Memorize holds the better App Store score, 4.5 against 4.2. Both are backed by a comparable volume of ratings — 10 and 13 respectively. Written reviews complicate that: 43% of i's written reviews are positive against 40% of Memorize's, so the app with the better star average is not the one people write more warmly about.
i ships an update every 6 days, Memorize every 3 weeks. The most recent releases landed on September 22, 2026 and August 12, 2026 respectively.
| Parameter | i | Memorize |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (10 ratings) | 4.5 (13 ratings) — better |
| Positive reviews | 42.9% of reviews — better | 40.0% of reviews |
| Number of ratings | 10 | 13 — better |
| Update frequency | Every 6 days — better | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad | iPhone, iPad, Mac, Vision Pro — better |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 67 MB | 133 MB |
| Age rating | 4+ | 4+ |
| Developer | BrainApp LLC | Jakub Milcarz |
Customer experience
i
Memorize
In-app purchases
i
- i-Memorize Sheet Remove ADs Option$0.99
- imc00010$0.99
- imc00020$0.99
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- i-Mem-Contents imc00030$0.99
- i-Mem-Contents imc00040$0.99
- i-Mem-Contents imc00010$0.99
- i-memorize Sheet File-Limit release add-on$2.99
- i-memorize Sheet PDF page-Limit release add-on$4.99
- Pro licence(campaign)$5.99
- i-memorize Sheet Limit release add-on$6.99
Memorize
- Memorize+ (Weekly)$1.997 Days
- Memorize+ (Monthly)$3.991 Month
- Memorize+ (Family)7 Days trial$9.991 Year
Show 1 moreShow fewer
- Memorize+ (Annual)7 Days trial$19.991 Year
- Memorize+ (Lifetime)$49.99









