記憶KEEPER vs Rail Typing
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。
Rail Typing
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新宿 → しんじゅく → shinjuku Learn to read Japanese, one train stop at a time. Rail Typing turns real Japanese train lines into reading practice. At every stop, read the station name: see the kanji and type it in hiragana or romaji, or hear the announcement and name the stop. Ride to the end of the line and you've learned to read dozens of real place names. Hiragana, katakana and kanji readings stick naturally, ride after ride. CAN'T READ KANA YET? START ON THE KANA LINE The kana are laid out as a train line, one row per stop. Listen, pick the reading, and arrive at the end of each row to see how many real station names you can now read. Branch lines add voiced kana, yōon, small tsu and the long vowel, and after hiragana the line moves on to katakana. The Kana line is always free. SIX WAYS TO PLAY, FROM BEGINNER TO FLUENT · Romaji: type station names in romaji, perfect if you're just learning kana · Kana: type in hiragana and get fluent at spelling in kana · Kanji: type the kanji names with the Japanese keyboard · Listening: the name is hidden, so type what you hear · Choice: no keyboard needed, just tap the right syllable, one-handed · English: type English station names on lines like the London Underground REAL LINES, REAL STATIONS · Tokyo's Yamanote, Ginza and Marunouchi lines, Osaka's Midosuji line, plus Kyoto, Nagoya, Fukuoka, Sapporo, Hakodate and London · A Japanese announcement for every station · More lines and cities on the way · The Yamanote line is free forever, and a different "Today's line" is free every day RACE YOUR FRIENDS, BEAT YOURSELF · Battle: quick match against players around the world · Friend rooms: share a code and start together · Ghost races: race your best run, or someone else's · Leaderboards on every line · Collect station stamps as you go · Home Screen widget and daily reminders to keep you practicing For anyone learning Japanese, planning a trip to Japan, into Japanese trains, or just wanting to type faster. ALL-LINES PASS (MEMBERSHIP) The Yamanote line, the daily free line and every mode are free. The All-lines pass unlocks every line, including new cities and lines as they're added. · Choose monthly, yearly (with a free trial for new subscribers) or a one-time purchase · Payment is charged to your Apple ID at confirmation of purchase · Subscriptions renew automatically unless turned off at least 24 hours before the end of the current period · Manage or cancel anytime in your App Store account settings Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://api.railtyping.com/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: 記憶KEEPER at none against Rail Typing's 3. 記憶KEEPER also leads on iOS requirement (15.0 vs 18.0). On price, update cadence, 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. Rail Typing sells 3 in-app purchases, starting at $1.99 per month. 記憶KEEPER asks for nothing beyond the download.
記憶KEEPER ships an update every 3 days, Rail Typing every 2 days. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.
| Parameter | 記憶KEEPER | Rail Typing |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 4 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | nao watanabe | 渭康 吕 |
In-app purchases
記憶KEEPER
No in-app purchases
Rail Typing
- Rail Pass · Monthly$1.991 Month
- Rail Pass · Yearly7 Days trial$9.991 Year
- Rail Pass · Lifetime$19.99









