# OBD2 Logger vs Diagnose AI

The clearest difference is in-app purchases: OBD2 Logger at none against Diagnose AI's 2. OBD2 Logger also leads on update cadence (every 6 weeks vs every 4 months). Diagnose AI's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Diagnose AI sells 2 in-app purchases, starting at $2.99 per month. OBD2 Logger asks for nothing beyond the download.

OBD2 Logger ships an update every 6 weeks, Diagnose AI every 4 months. The most recent releases landed on October 4, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | OBD2 Logger | Diagnose AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/diagnose-ai/id6773086171/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Monetization | — | Freemium |
| Size | 3 MB | 44 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Daehyun Nam](https://appshunter.io/developer/919392206) | [Shivansh Chhhabra](https://appshunter.io/developer/6773086173) |

## What reviewers say

### OBD2 Logger

[App page](https://appshunter.io/ios/app/obd2-logger/id6766004425)

**In-app purchases:** none


### Diagnose AI

[App page](https://appshunter.io/ios/app/diagnose-ai/id6773086171)

This app transforms your phone into an automotive health assistant. It connects to your car's OBD-II system via Bluetooth to translate fault codes into plain English, offering AI-powered diagnostics and DIY action plans. Manage multiple vehicles and review scan history for informed repairs.

**Highlights:** AI-powered plain-English diagnostics, One-tap Bluetooth OBD-II scanning, DIY action plans and guidance, Multi-vehicle garage management, Full scan history, Premium dark automotive interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $2.99 | per month |
| Pro Yearly | $19.99 | per year |


## Frequently asked questions

### Is OBD2 Logger free?

OBD2 Logger is free to download, with no in-app purchases.

### Is Diagnose AI free?

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

### Do OBD2 Logger or Diagnose AI have ads?

Neither OBD2 Logger nor Diagnose AI shows ads.

### Which is updated more often, OBD2 Logger or Diagnose AI?

OBD2 Logger ships an update every 6 weeks, and Diagnose AI every 4 months. Most recently, OBD2 Logger was updated on October 4, 2026 and Diagnose AI on October 23, 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.*