ARPJAM Studio vs Chords Weaver
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ARPJAM Studio
This app offers a generative synthesizer experience focused on sound design without requiring keyboard skills. It allows users to shape waveforms, filters, and effects in real-time as music plays, offering a unique approach to music creation for those who enjoy sound sculpting.
- Generative arpeggios with multiple waveforms
- Probability-based drum generation
- Chord progression locking
- Real-time XY pad parameter control
- Assignable LFOs for dynamic sound shaping
- Play pad for layering live input
- Preset saving and sharing
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No sequence. No play button needed. An instrument that keeps going without you programming anything. Two generative engines invent phrases endlessly inside the scale and chord you choose. What you shape is not a song — it is a way of sounding. Move a control and the sound changes shape without ever stopping. Density, contour, filter, tape movement. It is built so that nothing you touch can break it. And you can play it. On the key pad or from a MIDI keyboard, right on top of the stream it is generating. What you play can be captured into the looper. Now your own sound can go in too. Record a bar into SAMPLE, the fifth machine, and chopping it up and rearranging it is the app's job. ■ Generate • Two independent arpeggio engines (waveform, filter, envelope, effects) • Eight arpeggio types, chord progressions, ten time signatures • BASS — a bass machine of its own (STEP / COMPLEXITY / OMIT / PATTERN) • Drum machine • Six LFOs, XY pad, performance FX ■ Slice (SAMPLE) • Record one bar from a mic or line input, with count-in and click • Record the app itself (ARP A / ARP B / drums), and overdub onto it • Load audio files — and the audio from a video file • Up to 32 slices, ordered by the same rules as the arps: direction, reverse, octave, probability, groove • STRETCH (on by default) — change tempo without changing pitch • Its own filter, envelope and delay / reverb sends ■ Play • On-screen key pad — always in scale • MIDI keyboard input (damper pedal, pitch bend, standard control changes) • One-bar looper that records how hard you played ■ Sound • Piano — three velocity layers, stereo, damper release • Electric piano — harmonics shift with how hard you strike • Kalimba, handpan and chime — struck metal, measured from the real instruments and synthesised • Waveforms (sine / triangle / saw / square) plus an acid filter • Delay, reverb, Glitch, Granular, overdrive • DRIFT / FLUTTER — tape movement on the synth voices and the live input alike • Concert pitch A=415–444 Hz ■ Connect • AUv3 plug-in — as an instrument and as an effect • Ableton Link, MIDI Clock, MIDI out • External audio input (line / microphone) • WAV recording and export One-time purchase. No subscription.
Chords Weaver
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Chords Weaver is a hands-on chord instrument you play by ear. Pick a note on the keyboard and it filters to the chords that fit. Choose one, and two pads open up: one shapes its voicing (spread, inversion, octave) while the other suggests where to go next, the right side resolving, the left adding tension. Build a progression on the timeline, and a live piano roll shows exactly what will play. Press play and the progression comes alive with arpeggios, block grooves and strums, each chord ringing in time. Turn on Drift and the voicings slowly wander on their own, so the loop keeps evolving. MORE - Rich arpeggios: ascent/descent, ternary grooves (waltz, shuffle, jig 6/8), a lilting 7/4, and sparse syncopated patterns (charleston, tresillo, offbeat, push). - MIDI Out to your synths, DAW or hardware, with a 24 PPQN clock. - Four scenes, copy and paste, and a "roll a matching bridge" helper. - Optional cloud save: sign in with email, Google or Apple and your progressions follow you to every device. The app works fully offline. - Five languages: English, Français, Español, Русский, 日本語. Free to download. Weaving, voicings, playback and saving are all free. A one-time Pro unlock adds MIDI/WAV/text export and live MIDI-out. No ads, no subscriptions. Signing in is only for optional cloud sync.
Screenshots
Verdict
The clearest difference is price: Chords Weaver at Free against ARPJAM Studio's $12.99. ARPJAM Studio's advantage is update cadence (every 2 days vs every 5 days). On ads, in-app purchases, 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
Chords Weaver is free to download; ARPJAM Studio costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ARPJAM Studio ships an update every 2 days, Chords Weaver every 5 days. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.
| Parameter | ARPJAM Studio | Chords Weaver |
|---|---|---|
| Price | $12.99 | Free — better |
| Rating | 5.0 (6 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 2 days — better | Every 5 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 84 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Takashi Tsunoda | Loup Vuarnesson |
In-app purchases
ARPJAM Studio
No in-app purchases
Chords Weaver
No in-app purchases








