# ApduTool vs DiagonalOBDII

The clearest difference is in-app purchases: ApduTool at none against DiagonalOBDII's 4. ApduTool also leads on iOS requirement (16.2 vs 18.1). On price, update cadence, ads and device support there is nothing between them.

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

ApduTool ships an update fortnightly, DiagonalOBDII every 2 weeks. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | ApduTool | 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 | Fortnightly | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 0 MB | 21 MB |
| Requires iOS | **16.2** | 18.1 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Advanced Card Systems Ltd.](https://appshunter.io/developer/573447624) | [Kyle Louderback](https://appshunter.io/developer/1400068218) |

## What reviewers say

### ApduTool

[App page](https://appshunter.io/ios/app/apdutool/id1669190725)

**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 ApduTool free?

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

### Is DiagonalOBDII free?

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

### Do ApduTool or DiagonalOBDII have ads?

Neither ApduTool nor DiagonalOBDII shows ads.

### Which is updated more often, ApduTool or DiagonalOBDII?

ApduTool ships an update fortnightly, and DiagonalOBDII every 2 weeks. Most recently, ApduTool was updated on October 6, 2026 and DiagonalOBDII on October 5, 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.*