ギター 楽譜 JamJam vs Mr. Chord Doodle
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ギター 楽譜 JamJam
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好きな曲を、動画とコードで練習。 JamJamは、2,800曲以上のギターコード譜を動画に合わせて表示する練習アプリです。アカウント登録なしですぐ始められます。 【JamJamでできること】 ・動画の再生位置に合わせて、今弾くコードを表示 ・初心者向けのかんたんコードにワンタップで切り替え ・カポ位置、キー、BPM、コードの種類を確認 ・0.5〜1.5倍速で、難しい部分をゆっくり練習 ・弾きたい曲を保存して、あとですぐ見返す ・好きなアーティストから、自分向けの曲を見つける ・曲名やアーティスト名で検索 まずは登録なしで、好きな曲を1曲弾いてみてください。 基本機能は無料で利用できます。保存数などを拡張できるプレミアムプランも用意しています。 利用規約 https://jamjam-tiktok.web.app/terms プライバシーポリシー https://jamjam-tiktok.web.app/privacy
Mr. Chord Doodle
This app helps guitarists draw, save, and display chord diagrams with a freehand feel. It also includes a high-precision tuner and a versatile metronome, eliminating the need to switch between multiple tools for practice.
- Chord and scale diagram drawing
- Customizable chord saving
- Automatic chord detection
- High-performance guitar tuner
- Versatile metronome with sound sets
- Save favorite tempos and settings
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"Mr. Chord Doodle" is an all-in-one app designed for guitarists, allowing you to freely draw, display, and save chord diagrams with an intuitive "doodling" feel. In addition to creating chord diagrams, the app features a high-precision tuner and a versatile metronome. It solves common problems for guitarists, whether you want to check fingerings, log original chord progressions, or practice with a tuner and metronome without switching apps. [Main Features] ■Chord & Scale Drawing (Diagram Creation) Freely place positions on the guitar fretboard. Supports standard view, 180-degree reversed view, and a left-handed mode. Created chords and scales can be saved with custom names. Includes an automatic chord detection feature that identifies chord names based on your finger positions. ■High-Performance Guitar Tuner Supports Standard tuning, Half-Step Down tuning (with note detection), and Chromatic tuning. Easily tune your guitar before or during practice without leaving the app. ■Simple Metronome Features tempo-keeping with a choice of 6 sound sets. Save your favorite tempos and settings with custom names for easy recall during song practice. Whether you are a beginner learning chords, or an advanced player taking notes on chord progressions and scales, this app supports all levels of guitar practice. Perfect for your daily guitar session!
Screenshots
Verdict
The clearest difference is ads: ギター 楽譜 JamJam at none against Mr. Chord Doodle's shown. ギター 楽譜 JamJam also leads on iOS requirement (15.0 vs 17.6). Mr. Chord Doodle's advantage is update cadence (every 4 days vs every 9 days). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
ギター 楽譜 JamJam ships an update every 9 days, Mr. Chord Doodle every 4 days. The most recent releases landed on November 9, 2026 and November 11, 2026 respectively.
| Parameter | ギター 楽譜 JamJam | Mr. Chord Doodle |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 9 days | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPad, Mac — better |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 66 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | kotani harumi | KAZUAKI NATSUBAYASHI |
In-app purchases
ギター 楽譜 JamJam
No in-app purchases
Mr. Chord Doodle
No in-app purchases









