Comparison

Fretboard Master vs iRetroMuse

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Fretboard Master

Features
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【Take Your Guitar Fretboard Knowledge to the Next Level】 Fretboard Master is a dynamic learning app designed to visualize note names, intervals, scales, and chord shapes directly on the guitar fretboard. Equipped with a built-in tuner and metronome, it’s the ultimate all-in-one tool to supercharge your daily practice. ■ Key Features Dynamic Interval & Note Display: Easily switch views across all keys (supporting both sharps and flats). Comprehensive Scale Mapping: Instantly map essential jazz and rock scales across the entire fretboard. Tension Note Visualization: Check and analyze tension notes based on different chord types. CAGED System Integration: Visualize and master fretboard patterns using the CAGED system. Built-in Metronome: Practice seamlessly with background playback support. Whether you are a beginner or an advanced player, Fretboard Master is your powerful companion to deepening your understanding of music theory and mastering improvisation.

About

iRetroMuse

Features
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iRetroMuseは、80〜90年代のオーディオ機器をモチーフにした、レトロデザインのミュージックプレイヤーアプリです。 レコード、カセット、CD、ポータブルプレイヤーなど、懐かしい再生スタイルを切り替えながら、お気に入りの音楽を楽しめます。 温かみのあるアナログ風UIに加え、本格イコライザーやVUメーター演出を搭載。見た目だけでなく、音楽を“触って楽しむ”感覚まで再現しました。 【主な機能】 ・4種類のプレイヤーモード  RECORD / CASSETTE / CD / PORTABLE ・レトロ感あふれるアナログVUメーター ・プリセット対応7バンドイコライザー  Flat / Pop / Rock / Jazz / Classical / Bass Boost ・ボーカル調整やディープベース機能 ・シンプルで使いやすい音楽ライブラリ操作 ・ダークで高級感のあるオーディオUIデザイン 懐かしいオーディオ機器が好きな人も、レトロデザインが好きな人も、毎日の音楽時間をもっと特別に。 イヤホンをつけた瞬間、あの頃の気分がよみがえります。

Screenshots

Fretboard Master4 screens
iRetroMuse1 screens

Verdict

The call

The clearest difference is in-app purchases: iRetroMuse at none against Fretboard Master's 1. Fretboard Master's advantage is iOS requirement (15.0 vs 26.5). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Fretboard Master sells 1 one-off in-app purchase. iRetroMuse asks for nothing beyond the download.

UpkeepUpdate frequency

Fretboard Master ships an update every 3 weeks, iRetroMuse monthly. Both last shipped on November 5, 2026.

Scorecard2 real differences · 4 level
Fretboard Master versus iRetroMuse: the parameters behind the verdict, then further details
ParameterFretboard MasteriRetroMuse
PriceFreeFree
Update frequencyEvery 3 weeks — betterMonthly
AdsYesYes
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better26.5
Further details — not scored
Size29 MB10 MB
Age rating4+4+
DeveloperANTENNA WORKSKouki Yoshimoto

In-app purchases

1 purchases

Fretboard Master

One-time1
  • 広告を削除$1.99
None

iRetroMuse

No in-app purchases

Questions

Is Fretboard Master free?
Fretboard Master is free to download, with in-app purchases available.
Is iRetroMuse free?
iRetroMuse is free to download, with no in-app purchases.
Do Fretboard Master or iRetroMuse have ads?
Both Fretboard Master and iRetroMuse show ads.
Which is updated more often, Fretboard Master or iRetroMuse?
Fretboard Master ships an update every 3 weeks, and iRetroMuse monthly. Most recently, Fretboard Master was updated on November 5, 2026 and iRetroMuse on November 5, 2026.

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