# UMA M9 vs TST LED

The clearest difference is update cadence: UMA M9 at every 6 weeks against TST LED's every 6 months. UMA M9 also leads on iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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, TST LED every 6 months. The most recent releases landed on September 30, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | UMA M9 | TST LED |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/uma-m9/id6450772085/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 6 months |
| Monetization | Free | — |
| Size | 117 MB | 101 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [UMA RACING SDN. BHD.](https://appshunter.io/developer/1403287201) | [Foshan Lingchuang Future Information Technology Co., Ltd.](https://appshunter.io/developer/1836095920) |

## What reviewers say

### UMA M9

[App page](https://appshunter.io/ios/app/uma-m9/id6450772085)

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.

**Highlights:** Engine data monitoring, Malf-code reading, Fuel adjustment, Engine tuning, Tuning map sharing, Cloud ECU firmware access

**Features:** macOS Compatibility

**In-app purchases:** none


### TST LED

[App page](https://appshunter.io/ios/app/tst-led/id6751237442)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is UMA M9 free?

UMA M9 is free to download, with no in-app purchases.

### Is TST LED free?

TST LED is free to download, with no in-app purchases.

### Do UMA M9 or TST LED have ads?

Neither UMA M9 nor TST LED shows ads.

### Which is updated more often, UMA M9 or TST LED?

UMA M9 ships an update every 6 weeks, and TST LED every 6 months. Most recently, UMA M9 was updated on September 30, 2026 and TST LED on September 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*