# Gforce Link vs DiagonalOBDII

The clearest difference is in-app purchases: Gforce Link at none against DiagonalOBDII's 4. Gforce Link also leads on iOS requirement (5.1.1 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. Gforce Link asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 17, 2026 and August 22, 2026 respectively.

## The numbers

| Metric | Gforce Link | 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 2 weeks | Every 2 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 4 MB | 21 MB |
| Requires iOS | **5.1.1** | 18.1 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [G FORCE, K.K.](https://appshunter.io/developer/863835209) | [Kyle Louderback](https://appshunter.io/developer/1400068218) |

## What reviewers say

### Gforce Link

[App page](https://appshunter.io/ios/app/gforce-link/id863835206)

**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 Gforce Link free?

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

### Is DiagonalOBDII free?

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

### Do Gforce Link or DiagonalOBDII have ads?

Neither Gforce Link nor DiagonalOBDII shows ads.

### Which is updated more often, Gforce Link or DiagonalOBDII?

Gforce Link ships an update every 2 weeks, and DiagonalOBDII every 2 weeks. Most recently, Gforce Link was updated on September 17, 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.*