記憶KEEPER vs Lorebyte
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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。
Lorebyte
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Lorebyte is a flashcard app built on FSRS spaced repetition — designed for language learning and certification study. Review at the optimal moment, right before you forget. ◆ Science-based spaced repetition (FSRS) - The modern FSRS algorithm picks what to review next - Just rate each card: Again / Hard / Good / Easy - Done for the day? Keep going in Practice mode without affecting your schedule ◆ AI-generated flashcards - Paste text or import a PDF/photo, and AI drafts flashcards for you - Runs fully on-device via Apple Intelligence on supported devices — nothing leaves your device - Or bring your own API key (OpenAI, Anthropic, OpenRouter, and more) for cloud-powered generation - Review and edit every generated card before saving ◆ Create cards fast from your materials - Import from PDFs, photos, and screenshots (English/Japanese OCR) - Bulk import from CSV and plain text with automatic format detection - Optional Japanese translation aid for English study text (on-device) ◆ One study flow across iPhone, iPad, and Mac - Decks, cards, and history sync automatically via iCloud - No account sign-up required; works fully offline - Build and organize on Mac or iPad, review anywhere on iPhone ◆ Built to keep you going - Daily goals and up to three study reminders per day - Streaks with recovery, so a missed day doesn't reset your progress - Organize decks with icons and colors; view stats per deck - Automatic leech detection and flagged-cards-only review ◆ Privacy first - No ads, no tracking, no third-party analytics - Your study data stays on your device or in your own iCloud ◆ Pricing - Try every feature free for 7 days - Then unlock with a single one-time purchase (in-app). No subscription, ever - Moving to a new device? Use Restore Purchases For vocabulary, certification prep, and lecture notes — make remembering a daily habit.
Screenshots
Verdict
The clearest difference is in-app purchases: 記憶KEEPER at none against Lorebyte's 1. 記憶KEEPER also leads on update cadence (every 3 days vs weekly) and iOS requirement (15.0 vs 18.0). 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. Lorebyte sells 1 one-off in-app purchase. 記憶KEEPER asks for nothing beyond the download.
記憶KEEPER ships an update every 3 days, Lorebyte weekly. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.
| Parameter | 記憶KEEPER | Lorebyte |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days — better | Weekly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad, Mac — better |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 4 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | nao watanabe | Kiyotaka Tani |
In-app purchases
記憶KEEPER
No in-app purchases
Lorebyte
- Lorebyte Full Unlock$6.99









