Derivon vs Thoth
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Derivon
Master calculus concepts like derivatives and integrals through daily, intuitive practice. Earn rewards, collect planets, and build streaks as you progress through challenges. Designed for quick, effective learning sessions.
- Daily calculus problem practice
- Earn Star Sand rewards
- Collect planets in Gallery
- Build and maintain daily streaks
- Rank-Up Challenges
- Shooting mode for breaks
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Master calculus through daily practice. Solve derivatives and integrals by intuition — no overthinking, just repetition. • Swipe through problems and build your skills • Earn Star Sand with every correct answer • Spin the Gacha to collect planets in your Gallery • Build a daily streak — never break the chain • Take Rank-Up Challenges as you progress • Play Shooting mode for a quick break • Track your streak, level up, and earn rewards Whether you're preparing for AP Calculus, university exams, or just sharpening your math skills, Derivon makes practice feel like a space adventure. 3 minutes a day. That's all it takes. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Thoth
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Thoth(トート)は、高校化学の学習を「暗記」と「演習」の両輪で支えるアプリです。 ■ おぼえる — 忘れない暗記 理論・無機・有機の全範囲から厳選した1,200以上の項目を、科学的な復習スケジュール(間隔反復)で出題。「覚えたのに忘れる」を防ぎ、定期テストから共通テストまで、知識を維持し続けます。 ・あいまいな記憶は短い間隔で、確実な記憶は長い間隔で再出題 ・1回の学習は数分から。通学時間やすきま時間で続けられる ・オフラインでも学習可能。電波のない場所でも止まらない ■ 演習 — 解いて、間違いから学ぶ 700問以上の演習問題を収録。選択肢ごとに「なぜ間違えたか」を分析し、つまずきの原因(誤概念)に沿った解説を表示します。ただの正誤判定ではなく、「どこで考え方がずれたか」まで示します。 ■ 単元構成 教科書の流れに沿った60以上の単元で構成。理論化学・無機化学・有機化学のどこからでも始められます。 ■ 学校・クラスでの利用 先生からのクラスコードで参加すると、宿題の配信と提出状況の共有ができます。個人利用の場合、この機能は使わなくても構いません。 ■ こんな人におすすめ ・定期テスト前に暗記をまとめて固めたい ・共通テストに向けて化学の知識を維持したい ・覚えたはずのことをすぐ忘れてしまう ・すきま時間で効率よく勉強したい 料金:無料で始められます。
Screenshots
Verdict
The clearest difference is in-app purchases: Thoth at none against Derivon's 3. Thoth also leads on ads (none vs shown) and device support (3 vs 1). On price and update cadence 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. Derivon sells 3 one-off in-app purchases. Thoth asks for nothing beyond the download.
Derivon ships an update every 4 days, Thoth every 3 days. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.
| Parameter | Derivon | Thoth |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 days | Every 3 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 182 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | ABT合同会社 | THOTH Inc. |
In-app purchases
Derivon
- 5 Star Fragments$0.99
- 12 Star Fragments$1.99
- 32 Star Fragments$3.99
Thoth
No in-app purchases









