MIDIPlex vs SL Echo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MIDIPlex
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MotionMIDI transforms your iPhone into a powerful motion-based MIDI controller. Use the built-in motion sensors to control MIDI notes and continuous controller (CC) data through expressive gestures. Connect wirelessly via Bluetooth MIDI or use compatible CoreMIDI connections to perform with your favorite music apps and hardware. Features: • Motion-controlled MIDI performance • Bluetooth MIDI support • MIDI Note Mode • MIDI CC Mode • Real-time gesture control • Adjustable sensitivity and calibration • Presets optimized for popular music apps • Low-latency performance • Clean, performance-focused interface Whether you're creating expressive synthesizer performances, controlling effects, or experimenting with new ways to interact with music, MotionMIDI offers a simple and intuitive way to make movement part of your performance. Compatible with CoreMIDI-enabled apps and hardware that support MIDI input.
SL Echo
This audio effect app provides animated delay and space for musical decisions on iPad. Easily adjust time, feedback, and tone for various repeat styles, while maintaining a clear dry signal with stereo width and ducking. It supports AUv3 integration with popular music hosts.
- Animated delay and space effects
- Adjustable time and feedback
- Tone shaping controls
- Stereo width and ducking
- AUv3 support
- Standalone preview mode
- Factory and user presets
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SL Echo is a focused AUv3 delay effect designed for fast musical decisions on iPad. Move from a close vocal pocket to wide, evolving repeats without navigating complex pages. • Time and feedback for slapback or long trails • Tone shaping for darker or brighter repeats • Stereo width and ducking for a clear dry signal • Factory presets and local user presets • AUv3 support for compatible iPad music hosts Works as a standalone preview app and as an AUv3 effect in GarageBand, AUM, Cubasis, BeatMaker 3 and other compatible hosts.
Screenshots
Verdict
The clearest difference is price: MIDIPlex at $4.99 against SL Echo's $6.99. SL Echo's advantage is iOS requirement (15.0 vs 18.5). On update cadence, 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
MIDIPlex costs $4.99 and SL Echo $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MIDIPlex ships an update every 9 days, SL Echo weekly. The most recent releases landed on October 31, 2026 and October 16, 2026 respectively.
| Parameter | MIDIPlex | SL Echo |
|---|---|---|
| Price | $4.99 — better | $6.99 |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 9 days | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.5 | 15.0 — better |
| Further details — not scored | ||
| Size | 29 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | BRADLEY WAYNE MYERS | VIACHESLAV ZHILTSOV |
In-app purchases
MIDIPlex
No in-app purchases
SL Echo
No in-app purchases









