# OBDII Trouble Codes vs robo

The clearest difference is price: robo at Free against OBDII Trouble Codes's $3.99. robo also leads on update cadence (every 9 months vs every 25 months) and iOS requirement (9.0 vs 13.0). On ads, in-app purchases and device support there is nothing between them.

robo is free to download; OBDII Trouble Codes costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OBDII Trouble Codes ships an update every 25 months, robo every 9 months. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | OBDII Trouble Codes | robo |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 21.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 9 months** |
| Monetization | Paid | — |
| Size | 54 MB | 33 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oleg Chumakov](https://appshunter.io/developer/688892120) | [Touch Bionics, Inc.](https://appshunter.io/developer/622776964) |

## What reviewers say

### OBDII Trouble Codes

[App page](https://appshunter.io/ios/app/obdii-trouble-codes/id688892117)

Access a comprehensive offline database of over 18,500 diagnostic trouble codes for cars. Simply enter a fault code to get detailed descriptions without needing an internet connection or car model selection.

**Highlights:** Offline OBD2/EOBD code database, Over 18,500 error descriptions, No internet connection required, Simple fault code entry, Supports generic and manufacturer-specific codes, Copy and paste error descriptions

**Features:** macOS Compatibility

**In-app purchases:** none


### robo

[App page](https://appshunter.io/ios/app/robo-limb/id773508024)

**In-app purchases:** none


## Frequently asked questions

### Is OBDII Trouble Codes free?

OBDII Trouble Codes costs $3.99, with no in-app purchases.

### Is robo free?

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

### Do OBDII Trouble Codes or robo have ads?

Neither OBDII Trouble Codes nor robo shows ads.

### Which is updated more often, OBDII Trouble Codes or robo?

OBDII Trouble Codes ships an update every 25 months, and robo every 9 months. Most recently, OBDII Trouble Codes was updated on October 14, 2026 and robo on October 7, 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.*