TuneBoss CDI vs UMA M9
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TuneBoss CDI
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IMPORTANT: FOR ADVANCED USERS ONLY. USE AT OWN RISK. Support provided for TuneBoss Authorized Tuning Centers Only. This application requires a TuneBoss CDI unit (sold separately).
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.
Screenshots
Verdict
The clearest difference is iOS requirement: UMA M9 at 11.0 against TuneBoss CDI's 15.0. 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.
TuneBoss CDI ships an update monthly, UMA M9 every 6 weeks. The most recent releases landed on October 27, 2026 and November 3, 2026 respectively.
| Parameter | TuneBoss CDI | UMA M9 |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Monthly — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 63 MB | 117 MB |
| Age rating | 4+ | 4+ |
| Developer | FSR Technology | UMA RACING SDN. BHD. |
In-app purchases
TuneBoss CDI
No in-app purchases
UMA M9
No in-app purchases
