Comparison

ARPJAM vs Harmonics//

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

Head to head
About

ARPJAM

This app generates evolving ambient music using two independent arpeggio engines. It features a generative drum machine, sound design tools, and external instrument synchronization. Save and recall your favorite musical setups.

Highlights
  • Dual arpeggio engines
  • Generative drum machine
  • Sound design controls
  • External instrument sync (Ableton Link, MIDI Clock)
  • Save and recall presets
  • Built-in timer
Features
Read full description

ARPJAM is an arpeggio synthesizer that generates ever-evolving ambient music. Layer two independent arpeggio engines, each with its own waveform, scale, and pattern, and let the app weave an endless soundscape that shifts and breathes on its own. ■ Two Arpeggio Engines ARP A and ARP B run simultaneously, each with its own mode, scale, range, waveform, filter, and envelope. Five pattern modes: Random & Chord, Repeat, Random Single, Skank, and Drone. ■ Generative Drums A probability-based drum machine. Tune the firing density, double-hit chance, and open/closed hi-hat ratio for kick, snare, and hihat to create rhythms that evolve naturally alongside the arpeggio. ■ Sound Design Four waveforms — sine, triangle, sawtooth, square. Adjust the low-pass filter, attack, and overdrive per engine. Add depth with ping-pong delay and reverb. ■ Sync with External Instruments [NEW in v1.4] Ableton Link support — wirelessly sync tempo and bar phase with Ableton Move, Live, Koala, and other Link-enabled instruments on the same Wi-Fi network. USB-C MIDI Clock reception is also supported. Sample-accurate timing alignment, with a fine-tune Offset slider for each setup. ■ Redesigned Settings Panel [v1.4] Settings are now organized into five colored sections — Oscillator, Filter, Envelope, Algorithm, and Effects. Each section collapses individually or in bulk, and the state persists between launches. Jump directly to any section via the side rail (iPad) or sticky bar (iPhone). Clear square ON/OFF switches and vivid theme colors — orange for ARP A, lime for ARP B, cyan for Drums — make the whole panel far easier to navigate. ■ Save & Recall Four start presets (Default + SAVE 1/2/3) let you recall your favorite setups with a single tap from the start screen. Presets can be exported and imported as .arpjam files to share with other ARPJAM users. ■ Built-in Timer Choose countdown or infinite mode. The timer fades out with a gentle resolving chord — perfect as a sleep timer or as a companion to meditation. • 8 scales including pentatonic modes • 12 keys (Just Intonation / Equal Temperament switchable) • Groove control for swing feel • BPM 30–200 • English / Japanese language support • Ableton Link / MIDI Clock sync

About

Harmonics//

Effortlessly improvise music with evolving backing tracks across various genres. Discover melodies and create expressive soundscapes without needing music theory knowledge. Designed for both experienced musicians and beginners to explore sound and find creative flow.

Highlights
  • Generate backing tracks across genres
  • Intuitive melodic keyboards for improvisation
  • Explore diverse musical moods
  • Dynamic accompaniment with evolving grooves
  • Adjust tempo, energy, and instrumentation
  • Minimalist interface for creativity
Features
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Harmonics// transforms improvisation into an effortless musical experience. Choose a mood, select a groove, and instantly begin playing over rich, evolving backing tracks inspired by jazz, funk, neo soul, ambient, pop, Latin, and more. Whether you are an experienced musician or someone simply exploring sound for the first time, Harmonics// helps you discover melodies that feel expressive, emotional, and alive. Designed to feel inspiring instead of technical, Harmonics// generates dynamic accompaniment with tasteful drums, basslines, harmony, and atmospheric textures that continuously evolve while you play. Every session becomes a unique musical journey. FEATURES • Instantly generate backing tracks across multiple genres and vibes • Improvise using intuitive melodic keyboards designed to help you sound musical immediately • Explore moods ranging from cinematic and ambient to funky, soulful, and jazzy • Dynamic accompaniment with evolving grooves, fills, and musical variation • Built-in presets inspired by classic jazz standards, neo soul grooves, funk jams, Latin rhythms, and modern atmospheric textures • Adjust tempo, energy, instrumentation, and feel in real time • Create relaxing soundscapes, expressive solos, or energetic jam sessions • Minimal, immersive interface designed for flow and creativity • No music theory knowledge required Whether you want to practice improvisation, relax with expressive music, discover new melodic ideas, or simply lose yourself in creative flow, Harmonics// gives you an instant connection to musical inspiration. Tap into the flow.

Screenshots

ARPJAM4 screens
Harmonics//3 screens

Verdict

The call

The clearest difference is price: ARPJAM at Free against Harmonics//'s $2.99. ARPJAM also leads on iOS requirement (15.0 vs 18.6). Harmonics//'s advantage is in-app purchases (none vs 1). On rating, ratings volume, 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

ARPJAM is free to download; Harmonics// costs $2.99 up front. ARPJAM sells 1 one-off in-app purchase. Harmonics// asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for ARPJAM against 5.0 for Harmonics//. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Scorecard4 real differences · 6 level
ARPJAM versus Harmonics//: the parameters behind the verdict, then further details
ParameterARPJAMHarmonics//
PriceFree — better$2.99
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews33.3% of reviews—
Number of ratings11
Update frequencyDaily—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.6
Further details — not scored
Size7 MB151 MB
Age rating4+4+
DeveloperTakashi TsunodaCHASE PLACE LLC

Customer experience

ARPJAM

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

Harmonics//

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

ARPJAM

One-time1
  • Remove Ads$0.99
None

Harmonics//

No in-app purchases

Questions

Is ARPJAM free?
ARPJAM is free to download, with in-app purchases available.
Is Harmonics// free?
Harmonics// costs $2.99, with no in-app purchases.
Which has better reviews, ARPJAM or Harmonics//?
ARPJAM and Harmonics// are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do ARPJAM or Harmonics// have ads?
Neither ARPJAM nor Harmonics// shows ads.

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