i vs みやラボ
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.
みやラボ
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AI×SNSの新しい形を模索するコミュニティ。これからの時代、AIとSNSの存在は無視できません。両方を使いこなすライティングやマーケティングを学びます。
Screenshots
Verdict
The clearest difference is in-app purchases: みやラボ at none against i's 6. みやラボ also leads on ads (none vs shown) and iOS requirement (13.0 vs 18.0). i's advantage is update cadence (every 6 days vs every 10 months). On price 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. i sells 6 one-off in-app purchases. みやラボ asks for nothing beyond the download.
i ships an update every 6 days, みやラボ every 10 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | i | みやラボ |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (10 ratings) — better | — |
| Positive reviews | 42.9% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Every 6 days — better | Every 10 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 67 MB | 57 MB |
| Age rating | 4+ | 17+ |
| Developer | BrainApp LLC | creafons.k.k |
In-app purchases
i
- imc00010$0.99
- imc00020$0.99
- i-Mem-Contents imc00030$0.99
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- i-Mem-Contents imc00040$0.99
- i-Mem-Contents imc00010$0.99
- Pro licence(campaign)$5.99
みやラボ
No in-app purchases
