Trompong vs ARPJAM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Trompong
Experience the authentic sounds of Balinese Gamelan Gong Kebyar with this app. It features a row of 10 gongs, offering a realistic playing experience with high-quality sampled sounds and interactive controls. Explore detailed instrument views and customizable notation displays.
- Authentic sampled sound bank
- Realistic playing experience
- Ultra-low latency audio
- Zoomable instrument views
- Customizable cipher notation
- Ad-free experience
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World's first iPhone/iPad implementation of the main instruments of a Balinese Gamelan Gong Kebyar! A Trompong is a row of 10 gongs or kettles mounted on a frame, and is played by four players in the Balinese Gamelan Gong Kebyar. It plays the interlocking or kotekan parts and also marks the music by the patterns it plays. * Authentic sound bank sampled directly from real instruments * User interaction designed to replicate true playing experience * Playing sound can be stopped --- essential for Gamelan! * High-quality photos showcasing real instruments * Optimized for ultra-low latency audio playback * Zoomable views for detailed instrument exploration * Customizable display of cipher notations to suit your preferences * Completely ad-free for uninterrupted enjoyment
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.
- Dual arpeggio engines
- Generative drum machine
- Sound design controls
- External instrument sync (Ableton Link, MIDI Clock)
- Save and recall presets
- Built-in timer
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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
Screenshots
Verdict
The clearest difference is price: ARPJAM at Free against Trompong's $4.99. ARPJAM also leads on review sentiment (33% vs 0%) and update cadence (daily vs every 33 months). Trompong's advantage is in-app purchases (none vs 1). On 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
ARPJAM is free to download; Trompong costs $4.99 up front. ARPJAM sells 1 one-off in-app purchase. Trompong asks for nothing beyond the download.
Trompong ships an update every 33 months, ARPJAM daily. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.
| Parameter | Trompong | ARPJAM |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | 33.3% of reviews — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 33 months | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 36 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | emacsian Company Limited | Takashi Tsunoda |
Customer experience
Trompong
ARPJAM
In-app purchases
Trompong
No in-app purchases
ARPJAM
- Remove Ads$0.99









