WorldTime vs MistakeBook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WorldTime
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このアプリは自分で選んだ複数の国の時間をランダムに通知することができるアプリです 作成理由 海外に留学に行ったので、時差や隣の国の時間がひと目でわかるかつ、ランダムな時間にどこかの国の時間を通知されるアプリを作ったら面白そうだと思い、アプリを作りました。 公式サイト:coming soon... 推奨端末:ALL iPhone
MistakeBook
Log and review incorrect answers to improve learning. Organize mistakes by subject and topic, and utilize spaced repetition to reinforce weak areas. Track progress with visual charts and daily check-ins for effective test preparation.
- Log mistakes with photos and notes
- Organize by subject and custom tags
- Spaced repetition review mode
- Ebbinghaus forgetting curve schedule
- Progress charts and stats dashboard
- Data import/export backup
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Capture every wrong answer in seconds. Sort mistakes by subject, tag key topics, and build a personal error bank—no account required. Preparing for midterms, finals, or standardized tests? Spaced review quizzes follow the forgetting curve so weak spots come back at the right time. See progress charts and daily check-ins to stay on track. • Log mistakes with photos, notes, and difficulty tags • Organize by subject, chapter, and custom tags • Review mode: quiz, practice, and spaced repetition • Ebbinghaus schedule for smarter recall • Stats dashboard: mastery trends and weak areas • Import/export backup—data stays on your device Built for students who want a simple, private way to turn errors into higher scores.
Screenshots
Verdict
The clearest difference is price: WorldTime at Free against MistakeBook's $1.99. MistakeBook's advantage is device support and iOS requirement (13.0 vs 17.0). On 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
WorldTime is free to download; MistakeBook costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | WorldTime | MistakeBook |
|---|---|---|
| Price | Free — better | $1.99 |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | — | Monthly |
| Ads | — | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | — | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | CLIPPER, N.P.O. | Xiamen City Fanyou Network Technology Co., Ltd. |
In-app purchases
WorldTime
No in-app purchases
MistakeBook
No in-app purchases
