Comparison

レディモ vs Extrack

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

Head to head
About

レディモ

Features
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Radimoは、日本中にもっとラジオを! Radio More! そんな想いから名付けた、地域のコミュニティFMを聴取するためのスマートフォン向けアプリです。  一般社団法人 日本コミュニティ放送協会(JCBA)に加盟の放送事業者を対象に、Radimoを個別にご契約いただいた放送局が、本アプリに掲載されております。  録音機能は著作権等の兼ね合いもあり、有していません。 ■機能 ・コミュニティFM局の音声を聴取 ・放送局の切り替え ・放送局のHPなど掲載 ・メッセージの送信 ・番組表 ・防災防犯などの地域情報(PUSH型) ■補足説明 ・対象OSは、iOS14以上となります ・音声の遅延は、約5秒となります ■よくある質問 ・アプリは無料ですが、通信費はお客様負担となります ・途切れる場合は、バッファサイズを調整下さい ・1時間聴取して約30MBとなります ・録音機能はありません ・バックグラウンド再生に対応しています ※その他質問等は、サポートページやアプリのヘルプ画面を参照

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
Read full description

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.

Screenshots

レディモ4 screens
Extrack4 screens

Verdict

The call

The clearest difference is in-app purchases: レディモ at none against Extrack's 2. レディモ also leads on iOS requirement (15.0 vs 17.0). 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. Extrack sells 2 in-app purchases, starting at $5.99 per month. レディモ asks for nothing beyond the download.

UpkeepUpdate frequency

レディモ ships an update monthly, Extrack every 6 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
レディモ versus Extrack: the parameters behind the verdict, then further details
ParameterレディモExtrack
PriceFreeFree
Rating—4.0 (31 ratings) — better
Positive reviews—35.9% of reviews
Number of ratings—31 — better
Update frequencyMonthly — betterEvery 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size4 MB603 MB
Age rating12+4+
DeveloperSmart EngineeringYamaha Corporation

In-app purchases

None

レディモ

No in-app purchases

2 purchases

Extrack

Subscriptions2
  • Monthly Plan7 Days trial$5.991 Month
  • Yearly Plan7 Days trial$39.991 Year

Questions

Is レディモ free?
レディモ is free to download, with no in-app purchases.
Is Extrack free?
Extrack is free to download, with in-app purchases available.
Do レディモ or Extrack have ads?
Neither レディモ nor Extrack shows ads.
Which is updated more often, レディモ or Extrack?
レディモ ships an update monthly, and Extrack every 6 weeks. Most recently, レディモ was updated on October 29, 2026 and Extrack on October 30, 2026.

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