OP vs SEQTRAK
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OP
This app provides a wireless screen for the OP-Z synthesizer, displaying real-time musical data like mixer levels and effect amounts. It enhances interaction with multi-touch controls for simultaneous adjustments and a smooth touchpad for effects.
- Wireless screen for OP-Z
- Real-time data visualization
- Mixer level monitoring
- Effect level monitoring
- Multi-touch mixer control
- Touchpad for effects/filters
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This is the official OP-Z companion app. Use your iOS device as a wireless screen for the mighty OP-Z synthesizer. See the numbers and graphs behind the music you create in real time. At a glance, you know how your instruments are balanced in the mixer or just how much effect is applied to each instrument. The app adds another dimension to your interaction with the OP–Z. Unlocking multi-touch features, you can adjust multiple mixer sliders at once or use the smooth touch pad to adjust effects or filters.
SEQTRAK
This app enhances your music production experience with a dedicated interface for real-time control and visual feedback. Manage projects, expand your sound library, and create dynamic visualizers that sync with your music. Learn new techniques with interactive tutorials.
- Real-time GUI editor for device control
- Project and sound backup/reload
- Cloud sound library expansion
- 3D object and visual effect creation
- AR mode for real-world footage integration
- Dynamic, interactive tutorials
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The dedicated app for Music Production Studio SEQTRAK. ※SEQTRAK device required. [ MAIN FEATURES ] ・GUI Editor Interact with the SEQTRAK device, and watch as the app's screen responds to your actions in real time, providing a more intuitive and visual way to control the device. Utilize the app to fine-tune your sound design and adjust track patterns. ・PROJECT/SOUND MANAGER Back up projects created on the SEQTRAK device to this app and reload backed up data onto your device whenever needed. Plus, expand your sound library by downloading additional sounds from the cloud. ・VISUALIZER Create 3D objects and visual effects that respond to MIDI from SEQTRAK, and record and save your performances as videos. Plus, an AR mode, leveraging your smart device's camera to display 3D objects and effects onto real-world footage. *Please note, certain app settings may cause lights to flash intensely. ・DYNAMIC TUTORIAL Interact with the SEQTRAK device, and real time explanations and instructions display on the app. This feature allows you to learn and explore the functionalities of SEQTRAK while actively using it. ---- NOTES : At least 4GB of memory (RAM) is required to use the VISUALIZER function.
Screenshots
Verdict
The clearest difference is rating: SEQTRAK at 4.8 against OP's 4.2. SEQTRAK also leads on review sentiment (76% vs 47%). OP's advantage is update cadence (every 6 weeks vs every 5 months) and ratings volume (115 vs 12). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
SEQTRAK holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: OP has 115 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 47% of OP's written reviews are positive against 76% of SEQTRAK's.
OP ships an update every 6 weeks, SEQTRAK every 5 months. The most recent releases landed on October 16, 2026 and October 22, 2026 respectively.
| Parameter | OP | SEQTRAK |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (115 ratings) | 4.8 (12 ratings) — better |
| Positive reviews | 47.2% of reviews | 75.9% of reviews — better |
| Number of ratings | 115 — better | 12 |
| Update frequency | Every 6 weeks — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 127 MB | 1.3 GB |
| Age rating | 4+ | +4 |
| Developer | Teenage Engineering | Yamaha Corporation |
Customer experience
OP
SEQTRAK
Bugs and requests
OP
Reported bugs
26 issues- Manufacturing defects
- App crashes when using videoout feature
- App crashes or hangs with HDMI output
- Unable to connect through Bluetooth or adapter
- App no longer connects after getting a new iPad
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- Won't reliably connect via Bluetooth
- OP-Z won't stay connected to iPhone
- Disconnects after Bluetooth setup
- Won't connect via USB or Bluetooth
- App won't stay connected
- App crashes every time it's opened
- Fails to pair to screenless OP-Z
- Bluetooth still isn't working with current iOS
- Cannot connect, screen button doesn't work
- App not properly connected
- Disconnects
- Doesn't work on iPhone or iPad
- Bluetooth connection not sticking on iOS version 14.2
- Stopped working
- Bluetooth in iPadOS14.2 disconnects
- App no longer displays data from OP-Z
- iPad won't scan for OP-Z
- iPad app won't scan again
- iPad won't scan or recognize OP-Z
- Scan button currently doesn't detect OP-Z
- OP-Z app is stuck in sync mode
Requested features
5 requests- Make compatible for older iOS
- Offline guide available
- Add clear dial metrics
- Import sound plugs via app
- Add own Unity graphics
SEQTRAK
Not enough reviews yet to summarise bugs or requests.
In-app purchases
OP
No in-app purchases
SEQTRAK
No in-app purchases
