# CortLink vs OBD Diagnostics

The clearest difference is in-app purchases: CortLink at none against OBD Diagnostics's 1. CortLink also leads on ads (none vs shown) and iOS requirement (15.0 vs 26.2). On price, update cadence and device support there is nothing between them.

Both are free to download. OBD Diagnostics sells 1 one-off in-app purchase. CortLink asks for nothing beyond the download.

CortLink ships an update every 3 weeks, OBD Diagnostics monthly. The most recent releases landed on September 11, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | CortLink | OBD Diagnostics |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 454 MB | 23 MB |
| Requires iOS | **15.0** | 26.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Zhilian Shengya Electronic Technology Co., Ltd.](https://appshunter.io/developer/1690189809) | [EJSmith](https://appshunter.io/developer/305393602) |

## What reviewers say

### CortLink

[App page](https://appshunter.io/ios/app/cortlink/id6753962843)

**In-app purchases:** none


### OBD Diagnostics

[App page](https://appshunter.io/ios/app/obd-diagnostics/id6759762253)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is CortLink free?

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

### Is OBD Diagnostics free?

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

### Do CortLink or OBD Diagnostics have ads?

OBD Diagnostics shows ads; CortLink does not.

### Which is updated more often, CortLink or OBD Diagnostics?

CortLink ships an update every 3 weeks, and OBD Diagnostics monthly. Most recently, CortLink was updated on September 11, 2026 and OBD Diagnostics on September 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*