MIDI Check vs ab vortEx X
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.
ab vortEx X
This app is a stereo-only abstract spacetime designer for creating unique reverberations. It functions as an AUv3 plugin for compatible iOS hosts or as a standalone application, offering control over sound reflection spread.
- Stereo-only spatial audio algorithms
- AUv3 plugin compatibility
- Standalone application mode
- Touch screen interface
- Control over sound reflection spread
- Space, Time, Viscosity, Volumes controls
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'ab vortEx X' for iOS is a 'Light', stereo-only version of 'ab vortEx', an abstract spacetime designer for creating infinite variations of reverberations using our Spatial Audio algorithms under the hood. 'ab vortEx' for iOS comes as an AUv3 Plugin and is compatible with any iOS host that supports AUv3 (e.g. Garageband). The plugin contains a minimalist interface, compatible with Touch Screens - as you move through the screen, you can control how the algorithm works and how the reflections of the sound spread through time and space. 'ab Vortex X' also works as a stand-alone application (make sure you wear headphones or use a soundcard). 'ab vortEx X' supports Stereo signals and contains the most critical controls of 'ab Vortex' (Space, Time, Viscosity and Volumes) for providing quick ways to manipulate your sound.ab vortEx' for iOS works with Mono and Stereo signals.
Screenshots
Verdict
The clearest difference is review sentiment: ab vortEx X at 88% against MIDI Check's 0%. ab vortEx X also leads on rating (4.6 vs 4.0). MIDI Check's advantage is price ($1.99 vs $12.99) and update cadence (every 4 days vs every 2 months). 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 ab vortEx X $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ab vortEx X holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 4 and 8 respectively. Written reviews point the same way: 0% of MIDI Check's written reviews are positive against 88% of ab vortEx X's.
MIDI Check ships an update every 4 days, ab vortEx X every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | MIDI Check | ab vortEx X |
|---|---|---|
| Price | $1.99 — better | $12.99 |
| Rating | 4.0 (4 ratings) | 4.6 (8 ratings) — better |
| Positive reviews | 0.0% of reviews | 87.5% of reviews — better |
| Number of ratings | 4 | 8 — better |
| Update frequency | Every 4 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.3 — better | 11 |
| Further details — not scored | ||
| Size | 35 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | DejaWorks LTD | Alejandro Cabrera Zuniga |
Customer experience
MIDI Check
ab vortEx X
In-app purchases
MIDI Check
No in-app purchases
ab vortEx X
No in-app purchases









