Comparison

Extrack vs Retro MIDI Player Mobile

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

Head to head
About

Extrack

This app allows you to split songs into individual instrument parts and see chords in real-time. Practice along with your favorite music by adjusting volumes, changing tempo, or muting specific instruments. It's designed for musicians of all levels to enhance their practice sessions.

Highlights
  • Instrument stem separation
  • Real-time chord analysis
  • Adjustable instrument volumes
  • Practice 'minus one' style
  • Tempo and key changes
  • Section looping
  • Visual chord guides
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Play along with your favorite tracks. Extrack, an app that lets you split instruments and analyze chords, instantly. -You can use the basic features for free with no time limit. Subscribe, and you can unlock more advanced features. ・Separate songs into different instrument parts (vocal, guitar, piano, bass, drums, wind instruments) and freely adjust their volumes. ・Practice "minus one" style (mute one part and play it yourself). ・See the chords and how to play them on guitar or piano in real time while the song plays. ・Change the tempo, keys, or repeat specific sections easily. The app is very easy to use, even for beginners. ■When you feel like jamming with a band! -Load any song from your smartphone or tablet, and Extrack automatically separates it into each instrument part — such as guitar, drums, bass, piano, and wind instruments like saxophone. You can adjust the volume of each part freely, just the way you like. -If you’re a guitarist, turn down the other instruments and focus on the guitar sound to pick up even the most subtle phrase by ear. Then, switch the mix up, mute the guitar part and jam along with the rest of the band. It’s the closest thing to being on stage with your favorite artists! Want to tighten your rhythm? Turn up the drums and bass for focused practice. Or mute the vocals and enjoy singing along karaoke-style with real band sound! ■When you feel like jamming to that song you love! -Extrack automatically analyzes and displays the chord progression of any song. Even if you’re not good at figuring out chords by ear, you can enjoy jamming while watching the chords in real time. -It also shows how to play each chord on guitar or piano visually so even beginners who can’t read sheet music can feel confident. -Just load a song, and you can start practicing right away! If the song has chords that are too difficult, simply change the key or set a capo to make them easier to play. ■When you’re stuck on a part you’re having trouble with. -Want to play just one phrase over and over? -Want to slow down the tempo and practice carefully? -With Extrack, you can do it all easily. Simply select the section you want to repeat, skip by measure, or adjust the playback speed to match your pace. Plus, Extrack comes with a built-in metronome that automatically syncs with the song’s tempo, perfect for training your timing and rhythm. ■Just load your favorite song, and enjoy practicing with all of Extrack’s features. -Works with : MP3, AAC, FLAC, and more. -Add songs from iTunes or your CDs and start playing! - You can even import songs directly from cloud storage services.

About

Retro MIDI Player Mobile

Features
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レコンポーザ形式(RCP / R36 / G36)が鳴る、iPhone/iPad/iPhone Duo用のMIDIプレイヤーです。 1990年前後、PC-98シリーズのレコンポーザで作られた曲を、当時のファイルのままiPhone/iPad/iPhone Duoで開いて再生できます。 オレンジ色の液晶を思わせる高密度な画面に、Port A/Bの全32パートを一覧表示。各パートの音色名やレベル、演奏の動きを見ながら、あの頃のデータをもう一度楽しめます。iPhoneとiPadはどちらも縦画面と横画面で使え、iPhoneの横画面ではオレンジの液晶表示も楽しめます。iPhone Duoでは、開いても、半開きでも、閉じても、それぞれの姿勢に合わせた配置で使えます。 Piano Roll画面では、32パートの音符が上から鍵盤へ落ち、発音の流れを演奏と同期して見渡せます。 Piano Roll画面からは、楽譜とリズムの表示にも切り替えられます。楽譜では、レコンポーザのトラック画面のようなイベント一覧と2小節ずつの譜面に、ピッチベンドやエクスプレッションの変化を重ねたグラフを並べて表示。リズムでは、ドラムのパートをリズム名とドットの格子でまとめて表示します。 画面をロックしても再生は続き、ロック画面から曲送りや一時停止を操作できます。CarPlayでは車の画面から曲リストを開いて曲を選べ、ホーム画面やロック画面、CarPlayのダッシュボードにはウィジェットも置けます。 外部音源は、Core MIDI対応のMIDIインターフェースから出力できます。16パートまでなら1系統、Port A/Bの32パートを実機で鳴らす場合は、独立した2つのMIDI出力を使用します。SC-88VLやMU2000などの実機にも対応しています。 外部音源をお持ちでない場合も、内蔵音源だけでPort A/B全32パートを同時に再生できます。GS互換のサウンドに加え、SF2形式のサウンドフォントをご自身で指定すれば、XG音源や昔のパソコンやゲーム音源に似せるなど、お好みの音色に差し替えることも可能です。内蔵音源はApple M1以降を搭載するiPad、iPhoneではA19 ProプロセッサのiPhone 17 Pro以上での動作を推奨・確認済みです。それ以前の世代でも、詳細設定(iPadはHelp画面、iPhoneは設定画面)で最大同時発音数やUI描画FPSを下げることで、内蔵シンセサイザーに必要な演算性能不足からくる音切れを抑えられます。 主な機能 ・レコンポーザ形式(.rcp / .r36 / .g36)の再生 ・標準MIDIファイル(.mid / .midi)の再生 ・内蔵音源による単体再生(GM/GS準拠、Port A/B全32パート) ・SF2形式のユーザー定義音源への対応 ・Port A/B、全32パートの液晶風モニター ・鍵盤へ向かって上から下へ流れるPiano Roll ・楽譜(トラック譜面)とリズムパターンの表示 ・外部MIDI音源へのCore MIDI出力 ・画面ロック中の再生と、ロック画面からの操作 ・CarPlayとウィジェットへの対応 ・プレイリストの保存と、次回起動時の復元 ・曲を開くボタンからのファイル選択(iPadはOpen MIDI) ・iPhone/iPadの縦画面・横画面とiPhone Duoに対応 ・曲データからGS音源の特定音色マップやXG音源向けかを判定し、接続した複数の音源の中から最適な音源を選択して再生(曲ごとにポート設定変更が不要) レコンポーザ時代の曲と、実機の表示を眺めながら聴いた時間を、iPhone/iPad/iPhone Duoでもう一度。

Screenshots

Extrack4 screens
Retro MIDI Player Mobile4 screens

Verdict

The call

The clearest difference is price: Extrack at Free against Retro MIDI Player Mobile's $2.99. Retro MIDI Player Mobile's advantage is in-app purchases (none vs 2) and update cadence (every 4 days vs every 6 weeks). On ads, device support and iOS requirement 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

Extrack is free to download; Retro MIDI Player Mobile costs $2.99 up front. Extrack sells 2 in-app purchases, starting at $5.99 per month. Retro MIDI Player Mobile asks for nothing beyond the download.

UpkeepUpdate frequency

Extrack ships an update every 6 weeks, Retro MIDI Player Mobile every 4 days. The most recent releases landed on November 8, 2026 and November 10, 2026 respectively.

Scorecard3 real differences · 7 level
Extrack versus Retro MIDI Player Mobile: the parameters behind the verdict, then further details
ParameterExtrackRetro MIDI Player Mobile
PriceFree — better$2.99
Rating4.0 (31 ratings) — better—
Positive reviews35.9% of reviews—
Number of ratings31 — better—
Update frequencyEvery 6 weeksEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size603 MB40 MB
Age rating4+4+
DeveloperYamaha CorporationHideo Suzuki

In-app purchases

2 purchases

Extrack

Subscriptions2
  • Monthly Plan7 Days trial$5.991 Month
  • Yearly Plan7 Days trial$39.991 Year
None

Retro MIDI Player Mobile

No in-app purchases

Questions

Is Extrack free?
Extrack is free to download, with in-app purchases available.
Is Retro MIDI Player Mobile free?
Retro MIDI Player Mobile costs $2.99, with no in-app purchases.
Do Extrack or Retro MIDI Player Mobile have ads?
Neither Extrack nor Retro MIDI Player Mobile shows ads.
Which is updated more often, Extrack or Retro MIDI Player Mobile?
Extrack ships an update every 6 weeks, and Retro MIDI Player Mobile every 4 days. Most recently, Extrack was updated on November 8, 2026 and Retro MIDI Player Mobile on November 10, 2026.

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