MIDI Check vs WAIL
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MIDI Check
Diagnose and troubleshoot MIDI connections on your devices. View active connections, monitor incoming messages, and filter unwanted data. Record MIDI messages in the background with a clear, intuitive interface.
- Detect active MIDI connections
- View incoming MIDI messages
- Send test MIDI notes and control messages
- Filter MIDI channels and messages
- Filter MIDI System Exclusive messages
- Record MIDI messages in background mode
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*Diagnose The Problem & Find the Solution* Current Features: + See/detect, hardware/virtual active MIDI connections. + See all incoming messages. + Send test notes on/off and control messages. + MIDI Channel filter: Eliminate messages comes from unwanted MIDI channels. + MIDI Message filter: Eliminate unwanted messages (e.g. Note on, Note off, Pitch wheel etc.) + MIDI System Exclusive filter: Eliminate MIDI Clock and many other unwanted MIDI messages. + MIDI Delta-Time Added: See the time spent between messages + Record Incoming MIDI messages in background mode + 100% vectoriel cristal clear gorgeous user interface. + Slide the glass through the face, activate the desired filter with a gesture. **NOTE** Yamaha Bluetooth MD-BT01 users -> According to Yamaha user manual; all MIDI related application should be closed before bluetooth midi connection. Run the MIDI Check after connection established. If not you'll not be able to see the Yamaha midi connection on the app. This is not an application's issue. Because Yamaha use own BT protocol. Upcoming Features: - Music keyboard improvement. - Custom preset message send possibility.
WAIL
Transform unstable feedback into a powerful, playable instrument. This app offers direct control over harsh drones, soaring screams, and aggressive textures with an intuitive interface and real-time visual feedback.
- Dynamic XY Pads for tactile control
- Dedicated Performance Knobs for precise adjustments
- Real-time oscilloscope waveform display
- MIDI keyboard and sequencer support
- AUv3 integration with host sync
- Standalone app functionality
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WAIL - Industrial Feedback Synthesiser, Drone and AUV3 FX Turn unstable feedback into a playable instrument. WAIL forces a self-resonating signal into submission, generating harsh drones, soaring screams, and aggressive textures that traditional synths refuse to touch. Built for zero menu-diving and pure performance, WAIL delivers raw, uncompromised noise control in a single intuitive screen. TAME THE NOISE: 4 Dynamic XY Pads: Instant tactile control over Feedback/Filter, Bite/Space, Ring/Fold, and Comb/Sub. Dedicated Performance Knobs: Master, Spread, Grind, and Tune, with dual-axis Coarse/Fine tuning designed for precise, subtle adjustments mid-performance. Real-Time Visuals: Built-in integrated oscilloscope displays waveform stability and feedback saturation as you play. Drone or MIDI Triggered: Play as an evolving drone, or connect a MIDI keyboard or sequencer. AUv3 FX: Load WAIL as an effect in your host and run any track through its feedback engine. Push a drum loop, a vocal, or a synth line into full self-resonating collapse, or layer WAIL's own drone on top of what you send in. Seamless AUv3 Integration: Full host transport sync, preset save/recall, and universal MIDI CC learn across all 12 parameters. Universal Support: Formatted natively for both iPad and iPhone as an AUv3 plugin or Standalone app. 12 parameters. 4 XY pads. One feedback loop trying to escape. Sound demo here - https://www.youtube.com/watch?v=Z18IcVSqtwY Crafted by NOIDED Industries, Rochdale, England
Screenshots
Verdict
The clearest difference is review sentiment: WAIL at 83% against MIDI Check's 0%. WAIL also leads on rating (5.0 vs 4.0). MIDI Check's advantage is price ($1.99 vs $9.99) and update cadence (every 4 days vs every 6 weeks). On ratings volume, ads, in-app purchases and monetization model 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
MIDI Check costs $1.99 and WAIL $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
WAIL holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 9 respectively. Written reviews point the same way: 0% of MIDI Check's written reviews are positive against 83% of WAIL's.
MIDI Check ships an update every 4 days, WAIL every 6 weeks. The most recent releases landed on October 13, 2026 and October 28, 2026 respectively.
| Parameter | MIDI Check | WAIL |
|---|---|---|
| Price | $1.99 — better | $9.99 |
| Rating | 4.0 (4 ratings) | 5.0 (9 ratings) — better |
| Positive reviews | 0.0% of reviews | 83.3% of reviews — better |
| Number of ratings | 4 | 9 — better |
| Update frequency | Every 4 days — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.3 — better | 15.6 |
| Further details — not scored | ||
| Size | 35 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | DejaWorks LTD | Anthony Moran |
Customer experience
MIDI Check
WAIL
In-app purchases
MIDI Check
No in-app purchases
WAIL
No in-app purchases









