# IOC Lite vs DiagonalOBDII

The clearest difference is in-app purchases: IOC Lite at none against DiagonalOBDII's 4. IOC Lite also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.1). DiagonalOBDII's advantage is update cadence (every 2 weeks vs every 6 weeks). On price and ads there is nothing between them.

Both are free to download. DiagonalOBDII sells 4 in-app purchases, starting at $12.99 per month. IOC Lite asks for nothing beyond the download.

IOC Lite ships an update every 6 weeks, DiagonalOBDII every 2 weeks. The most recent releases landed on September 9, 2026 and August 22, 2026 respectively.

## The numbers

| Metric | IOC Lite | DiagonalOBDII |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/diagonalobdii/id6743419784/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 23 MB | 21 MB |
| Requires iOS | **13.0** | 18.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [XIAMEN GALAXY CAMPHOL TECHNOLOGY CO.,LTD](https://appshunter.io/developer/1480677214) | [Kyle Louderback](https://appshunter.io/developer/1400068218) |

## What reviewers say

### IOC Lite

[App page](https://appshunter.io/ios/app/ioc-lite/id1546816451)

**Features:** macOS Compatibility

**In-app purchases:** none


### DiagonalOBDII

[App page](https://appshunter.io/ios/app/diagonalobdii/id6743419784)

This app helps mechanics perform vehicle drive cycles more efficiently. It provides real-time monitoring of emissions monitors and diagnostic trouble codes (DTCs), offering clear guidance and instant explanations to ensure vehicles pass inspection quickly and accurately.

**Highlights:** Live drive cycle monitoring, Immediate diagnostic trouble code (DTC) identification, Real-time emissions monitor status, Precise drive cycle parameter guidance, Professional, easy-to-navigate dashboard, Instant code explanations

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diagonal Premium Monthly | $12.99 | per month |
| Diagonal Premium Trial | $12.99 | per month |
| Shop Owner - Monthly | $17.99 | per month |
| Diagonal Premium Yearly | $99.99 | per year |


## Frequently asked questions

### Is IOC Lite free?

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

### Is DiagonalOBDII free?

DiagonalOBDII is free to download, with in-app purchases available.

### Do IOC Lite or DiagonalOBDII have ads?

Neither IOC Lite nor DiagonalOBDII shows ads.

### Which is updated more often, IOC Lite or DiagonalOBDII?

IOC Lite ships an update every 6 weeks, and DiagonalOBDII every 2 weeks. Most recently, IOC Lite was updated on September 9, 2026 and DiagonalOBDII on August 22, 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.*