jAmp Doubler vs MIDI Drum
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
jAmp Doubler
This audio plugin creates a stereo effect by introducing a subtle delay to one audio channel. It offers precise control over the delay time and can be managed via MIDI. Ideal for enhancing mono audio sources with a wider soundstage.
- Stereo widening effect
- Adjustable delay time (0-50 microseconds)
- MIDI control
- AUv3 plugin format
- Enhances mono audio
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Doubler is an AUv3 plugin that adds stereo effect by delaying the right channel wrt the left channel. The delay is controlled by the central knob and goes from 0 microseconds to 50 microseconds. It is possible to control this plugin via MIDI.
MIDI Drum
Create and perform drum patterns with an 8-track sequencer. Connect to external instruments and apps via Bluetooth or USB MIDI. Share your creations and explore a library of user-made songs.
- 8-track drum sequencer
- User-friendly interface
- Live performance mode
- General MIDI sound source
- Bluetooth LE and USB MIDI support
- Song library for sharing
- Export Standard MIDI Files (paid add-on)
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Key Features: - 8-track drum sequencer - Simple, user-friendly interface - Display and edit 4 to 48 steps across 4 cycles on a single screen - Live performance with up to 6 toggleable blocks - Built-in sound source compliant with General MIDI - Compatible with electronic instruments via MIDI connection (e.g., Casiotone, PortaTone, InstaChord) - Connection options: Bluetooth LE MIDI or USB MIDI - Extend sound sources by connecting with other apps such as bs-16i - Can be operated via external MIDI devices, keyboards, and page-turning switches - Song library for sharing self-created data and downloading from other users - Export Standard MIDI Files (SMF) – available as a paid add-on *Loading data created by other users is free. *In-app purchases apply across all devices. Official Website (Japanese): https://instachord.com/product/midi-drum/ User Manual (English): https://kantan-music.notion.site/MIDI-Drum-Manual-5976bdeba4f04900851f0e3c9ae247d6 Song Library: https://instachord.com/community/drum-data/ Developer: bismark [https://www.bismark.jp/
Screenshots
Verdict
The clearest difference is rating: jAmp Doubler at 5.0 against MIDI Drum's 3.7. jAmp Doubler also leads on in-app purchases (none vs 2) and update cadence (every 9 days vs every 3 weeks). On price, 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
Both are free to download. MIDI Drum sells 2 one-off in-app purchases. jAmp Doubler asks for nothing beyond the download.
jAmp Doubler holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 4 and 3 respectively.
jAmp Doubler ships an update every 9 days, MIDI Drum every 3 weeks. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.
| Parameter | jAmp Doubler | MIDI Drum |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | 3 |
| Update frequency | Every 9 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 14.0 |
| Further details — not scored | ||
| Size | 6 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Jan Maes | InstaChord Corp. |
Customer experience
jAmp Doubler
MIDI Drum
In-app purchases
jAmp Doubler
No in-app purchases
MIDI Drum
- Save in proprietary format$4.99
- Export as SMF$4.99
