# Prevost OBD Code Converter vs UMA Expo

The clearest difference is price: UMA Expo at Free against Prevost OBD Code Converter's $9.99. UMA Expo also leads on update cadence (every 7 months vs every 24 months) and device support (4 vs 2). Prevost OBD Code Converter's advantage is ads (none vs shown) and chart position (#110 vs unranked). On in-app purchases there is nothing between them.

UMA Expo is free to download; Prevost OBD Code Converter costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Prevost OBD Code Converter ships an update every 24 months, UMA Expo every 7 months. The most recent releases landed on October 8, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Prevost OBD Code Converter | UMA Expo |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/prevost-obd-code-converter/id1327369843/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 24 months | **Every 7 months** |
| Monetization | Paid | — |
| Best chart rank | **#110** | — |
| Size | 59 MB | 65 MB |
| Requires iOS | 18.2 | **10.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [Prevost Car (US) Inc.](https://appshunter.io/developer/443371120) | [United Motorcoach Association](https://appshunter.io/developer/1442961383) |

## What reviewers say

### Prevost OBD Code Converter

[App page](https://appshunter.io/ios/app/prevost-obd-code-converter/id1327369843)

**Currently charting:** #110 Top Paid · Business (US App Store)

This tool translates complex OBD codes into easily understandable error messages. It helps users quickly identify and understand vehicle diagnostic trouble codes.

**Highlights:** OBD code translation, Error message equivalents, Vehicle diagnostics aid

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

**In-app purchases:** none


### UMA Expo

[App page](https://appshunter.io/ios/app/uma-expo/id6444640324)

**In-app purchases:** none


## Frequently asked questions

### Is Prevost OBD Code Converter free?

Prevost OBD Code Converter costs $9.99, with no in-app purchases.

### Is UMA Expo free?

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

### Do Prevost OBD Code Converter or UMA Expo have ads?

UMA Expo shows ads; Prevost OBD Code Converter does not.

### Which is updated more often, Prevost OBD Code Converter or UMA Expo?

Prevost OBD Code Converter ships an update every 24 months, and UMA Expo every 7 months. Most recently, Prevost OBD Code Converter was updated on October 8, 2026 and UMA Expo on September 24, 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.*