UMA M9 vs CDI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UMA M9
This application connects to a specific engine control unit (ECU) to monitor engine data, read diagnostic trouble codes, and perform various engine tuning adjustments. It also allows for tuning map sharing and accessing cloud-based ECU firmware and calibration files.
- Engine data monitoring
- Malf-code reading
- Fuel adjustment
- Engine tuning
- Tuning map sharing
- Cloud ECU firmware access
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M9 APP supports UMA M9 ECU. The main functions are as below: 1. Engine data monitor 2. Malf-code read 3. Engine tuning: 3.1 Fuel Adj., Fuel Acc. 3.2 Fuel Temperature Compensation 3.3 IG, 3.4 Idle RPM, RPM Limit, VVA Control, Speed Gain, Coolant Fan 3.5 Auto Tune, 3.6 Idle Lope, Backfire 4. Tuning map sharing 5. QuickBurn: Cloud data of ECU firmware and calibration file 6. Function upgrade: Choosing and purchasing the upgrated function by user.
CDI
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Unlock Full Performance Take Full Control! Enhance your engine’s performance with easy tuning at your fingertips. Key Features: 1. Ignition Timing Adjustment – Fine-tune ignition timing for maximum torque and power. 2. Rev Limit Adjustment – Set the engine's rev limit to unlock its full potential. 3. Mode Switching – Easily switch between driving modes for optimal performance. 4. Quick Shift – Faster gear shifts, reduced lag, and improved acceleration. 5. Hold/Reset Max Speed – Record and reset your top speed effortlessly. 6. Logging Function – Monitor real-time engine performance data. 7. Load/Save File Tune – Save and load tuning files instantly. 8. Launch Control – Optimize launch settings for powerful, wheel-spin-free acceleration. User-friendly – Suitable for both beginners and pro tuners! Download now and unleash your engine’s true potential!
Screenshots
Verdict
The clearest difference is iOS requirement: UMA M9 at 11.0 against CDI's 13.0. On price, update cadence, ads and in-app purchases 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.
UMA M9 ships an update every 6 weeks, CDI every 2 months. The most recent releases landed on September 11, 2026 and September 22, 2026 respectively.
| Parameter | UMA M9 | CDI |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 11.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 117 MB | 29 MB |
| Age rating | 4+ | 17+ |
| Developer | UMA RACING SDN. BHD. | ECU=SHOP |
In-app purchases
UMA M9
No in-app purchases
CDI
No in-app purchases
