Ebbing vs 記憶KEEPER
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ebbing
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Ebbing is a study app that keeps a record of what you've studied and tells you the best time to review it, based on the forgetting curve. Just log your daily study in a simple interface, and Ebbing builds your review schedule automatically. You can see at a glance what to review, and when. No more wasting time on unplanned studying. Ebbing helps what you learn stick. ◇ Key Features • Log what you study, and get a review schedule generated automatically from the forgetting curve • A Home screen that shows today's reviews at a glance • A calendar to see and adjust all your upcoming reviews • Statistics: estimated retention rate, a study heatmap, and your study streak (Ebbing Plus) • Custom review intervals (Ebbing Plus) • Schedule editing — drag a review to a new date, and shift the reviews after it along with it (Ebbing Plus) • Review reminder notifications • Guide articles on evidence-based study methods ◇ Made For • Planning your study for certification exams and entrance exams • Vocabulary review cycles in language learning • Anyone who wants new knowledge to really stick • Anyone who wants to review efficiently, before they forget ◇ How It Works Ebbing is built on the "forgetting curve," first described by the psychologist Hermann Ebbinghaus. It models how people forget, and helps strengthen memory by spacing your reviews at appropriate intervals. The retention rate shown in the app is an estimate based on this model, not a measurement. ◇ Ebbing Plus (optional auto-renewable subscription) Ebbing Plus removes the limit on the number of materials and unlocks custom review intervals, schedule editing, and statistics. Monthly and yearly plans are available, and the price is shown on the purchase screen. You can cancel your subscription anytime in your App Store account settings. Terms of Use: https://ebbing-app.web.app/en/terms.html Privacy Policy: https://ebbing-app.web.app/en/privacy.html
記憶KEEPER
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「いつ復習すればいいか分からない」「問題集を何周もしているのに身につかない」——記憶KEEPERは、忘却曲線にもとづく間隔反復で、資格勉強の“復習タイミング”を自動で管理するアプリです。 【特長】 ・問題番号を登録するだけ。カードを一から作る手間はありません。 ・「今日復習すべき問題」を毎日提示し、勉強の偏りを防ぎます。 ・苦手な問題だけを集中して復習できる「苦手対策」。 ・教材→章→節で整理でき、複数の資格を並行して管理できます。 ・広告なし・余計な通知なし。 【こんな方に】 宅建士・FP・簿記・施工管理技士・行政書士・社労士など、自分の問題集で暗記を進めたい資格受験者の方へ。 今なら無料でご利用いただけます。
Screenshots
Verdict
The clearest difference is in-app purchases: 記憶KEEPER at none against Ebbing's 2. 記憶KEEPER also leads on update cadence (every 3 days vs weekly) and iOS requirement (15.0 vs 26.0). On price, ads 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. Ebbing sells 2 in-app purchases, starting at $4.99 per month. 記憶KEEPER asks for nothing beyond the download.
Ebbing ships an update weekly, 記憶KEEPER every 3 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.
| Parameter | Ebbing | 記憶KEEPER |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 26.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 28 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Munehito Kamura | nao watanabe |
In-app purchases
Ebbing
- Ebbing Plus (Monthly)$4.991 Month
- Ebbing Plus (Yearly)$29.991 Year
記憶KEEPER
No in-app purchases








