# TuneBoss CDI vs UMA M9

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.

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.

## The numbers

| Metric | TuneBoss CDI | UMA M9 |
| --- | --- | --- |
| 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 | **Monthly** | Every 6 weeks |
| Monetization | — | Free |
| Size | 63 MB | 117 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FSR Technology](https://appshunter.io/developer/1593810671) | [UMA RACING SDN. BHD.](https://appshunter.io/developer/1403287201) |

## What reviewers say

### TuneBoss CDI

[App page](https://appshunter.io/ios/app/tuneboss-cdi/id6447420018)

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is TuneBoss CDI free?

TuneBoss CDI is free to download, with no in-app purchases.

### Is UMA M9 free?

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

### Do TuneBoss CDI or UMA M9 have ads?

Neither TuneBoss CDI nor UMA M9 shows ads.

### Which is updated more often, TuneBoss CDI or UMA M9?

TuneBoss CDI ships an update monthly, and UMA M9 every 6 weeks. Most recently, TuneBoss CDI was updated on October 27, 2026 and UMA M9 on November 3, 2026.

---

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