Comparison

Piano Chord vs ARPJAM Player

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

Head to head
About

Piano Chord

Features
Read full description

Piano Chordは、ピアノのコードを直感的に鳴らすことができる音楽アプリです。 【3つのモード】 ■ 再生モード ルート (CDEFGAB + # )の12音と、16種のコードをタップすることで直感的にコードの演奏が可能。 鍵盤ハイライトでコードの構成音を視覚的に確認できます。 ■ コード進行モード 4つのコードを登録してループ再生が可能。 再生しながらリアルタイムでコードを変更できるのでセッションや作曲のアイデア出しに最適です。 ■ マルチビューモード 4画面・8画面で複数のコードを同時に比較。コード同士の響きの違いを直感的に把握できます。 【主な機能】 ・16種のコード(トライアド・7th・6th/9th) ・5種のスケール(メジャー・マイナー・ペンタトニック・ブルース) ・SoundFont音源によるリアルタイム発音 ・ルート音カラーと構成音カラーのカスタマイズ ・マスター音量・トランスポーズ設定

About

ARPJAM Player

This app lets you queue music tracks with custom playtimes, automatically fading out and transitioning to the next. It ensures consistent loudness across tracks and supports background playback with screen-off functionality. Explore a library of published tracks or import your own.

Highlights
  • Customizable track playtimes
  • Automatic track fading and transition
  • Matched loudness for consistent volume
  • Background playback with screen off
  • Browse and import JAMs
  • Dynamic music engine
Features
Read full description

ARPJAM Player is a device for leaving your JAMs running. Line up the JAMs you want to hear and give each one a play time. When the time is up it fades out on its own and hands over to the next one. Nothing else to do. ■ For as long as you like Play times run from one minute to twelve hours, set on a reel. Leave one JAM running all afternoon, or cut them short and keep moving. It is built for the kind of listening that lasts a whole opening shift. ■ Matched loudness JAMs vary in level. Each one is measured once when you add it, and matched on playback — the loud ones come down, the quiet ones come up. No sudden jump when the next one starts. Nothing chases the level while the music plays, so the volume never moves mid-performance. ■ With the screen off Background playback is supported. Lock the screen and it keeps going. Play, pause and skip from the Lock Screen or Control Center. ■ JAM Library Open the JAM Library from inside the app and add published JAMs directly. Browse by genre and see the artist, the notes, the BPM and the key. Official JAMs and submitted JAMs sit side by side. You can also import .arpjam files stored on your device, including files written by the earlier ARPJAM. ■ It never plays the same way twice The ARPJAM engine is not playing back a fixed score. It builds the performance as it goes, following rules. The same JAM sounds different every time you play it, so it does not become a loop you get tired of — even after hours. Same engine as ARPJAM Studio. ■ Made for · Saunas, spas, treatment rooms · Cafes, shops, galleries · Working, studying, winding down · Exhibitions and installations — — ARPJAM Player does not create JAMs. To make them, use ARPJAM Studio.

Screenshots

Piano Chord4 screens
ARPJAM Player3 screens

Verdict

The call

The clearest difference is update cadence: ARPJAM Player at every 2 days against Piano Chord's every 5 days. Piano Chord's advantage is iOS requirement (13.0 vs 15.0). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Piano Chord ships an update every 5 days, ARPJAM Player every 2 days. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.

Scorecard2 real differences · 7 level
Piano Chord versus ARPJAM Player: the parameters behind the verdict, then further details
ParameterPiano ChordARPJAM Player
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 5 daysEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size167 MB78 MB
Age rating4+4+
DeveloperHideaki SatoTakashi Tsunoda

In-app purchases

None

Piano Chord

No in-app purchases

None

ARPJAM Player

No in-app purchases

Questions

Is Piano Chord free?
Piano Chord is free to download, with no in-app purchases.
Is ARPJAM Player free?
ARPJAM Player is free to download, with no in-app purchases.
Do Piano Chord or ARPJAM Player have ads?
Neither Piano Chord nor ARPJAM Player shows ads.
Which is updated more often, Piano Chord or ARPJAM Player?
Piano Chord ships an update every 5 days, and ARPJAM Player every 2 days. Most recently, Piano Chord was updated on October 31, 2026 and ARPJAM Player on November 1, 2026.

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