TacticalStudy vs 記憶KEEPER
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TacticalStudy
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From Tracking Time to Tracking Output. TacticalStudy: Your Strategic Partner for Mastering Practice Problems. TacticalStudy shifts your focus to the core of learning: output. By combining review scheduling based on the Ebbinghaus Forgetting Curve, automated weak-point detection, and a token system to sustain motivation, we provide the shortest route to conquering your exams and certifications. *Scientific "Forgetting Curve" Management Visualize your retention rates with our unique algorithm. Simply mark a problem as "Correct," "Hard," or "Incorrect," and the app automatically calculates the optimal review timing (1 day, 3 days, 7 days later, etc.). View your retention progress on a graph to ensure you never miss the critical moment for memory maintenance. *Ruthless "Weak Point Elimination" System Problems marked "Hard" or "Incorrect" three times are automatically moved to your "Flagged List." Before exams, focus exclusively on this list to efficiently overcome your weaknesses. *Motivation-Boosting "Tokens & Statistics" Earn "Tokens" for every problem you solve. Tokens are doubled for review questions, naturally building a habit of prioritizing revision. Track your growth with daily, weekly, and monthly graphs showing progress, accuracy rates, and token counts. *Powerful Study Tools • PDF Viewer: Open your problem sets and answer keys in multiple tabs for seamless side-by-side study. • Custom Notes: Attach images, PDFs, or text notes to specific problems to create your own personalized reference book. • Task Management: Create study tasks linked to specific problems with strict deadline management. Recommended For: • High-Stakes Test Takers: Ideal for CPA, Bar Exam, Language Certifications, and University Entrance Exams where output volume is key. • Those Who Hate Planning Reviews: Stop worrying about "when to review." Let the algorithm decide so you can focus entirely on "solving." • Busy Professionals & Short-Term Learners: For those seeking a strategic approach to cut out waste and focus only on low-retention areas. • Those Who Fear "False Confidence": Visualize your actual memory state. Adjust your peak retention perfectly for exam day.
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 iOS requirement: 記憶KEEPER at 15.0 against TacticalStudy's 17.6. 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. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on September 10, 2026 and September 20, 2026 respectively.
| Parameter | TacticalStudy | 記憶KEEPER |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days | Every 3 days |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Yutaka Mochida | nao watanabe |
In-app purchases
TacticalStudy
No in-app purchases
記憶KEEPER
No in-app purchases








