# ChkOBD OBD2 Analyzer vs PRIME _

The clearest difference is in-app purchases: PRIME _ at none against ChkOBD OBD2 Analyzer's 4. ChkOBD OBD2 Analyzer's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ChkOBD OBD2 Analyzer sells 4 in-app purchases, starting at $4.99 per month. PRIME _ asks for nothing beyond the download.

ChkOBD OBD2 Analyzer ships an update every 3 months, PRIME _ every 4 months. The most recent releases landed on October 13, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | ChkOBD OBD2 Analyzer | PRIME _ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/chkobd-obd2-analyzer/id1511585011/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 63 MB | 90 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Check On-Board Diagnostics LLC](https://appshunter.io/developer/1511585010) | [Lukas Mirejovsky](https://appshunter.io/developer/1758295868) |

## What reviewers say

### ChkOBD OBD2 Analyzer

[App page](https://appshunter.io/ios/app/chkobd-obd2-analyzer/id1511585011)

Connect your iPhone or iPad to your car's engine to view vital data. Access basic engine values for free, with in-app purchases for advanced diagnostics, smog check readiness, VIN analysis, and error decoding.

**Highlights:** View engine values, In-app purchase for advanced data, Smog Check Assistant, VIN Analyzer, Error Decoder and Reset, Bluetooth adapter compatibility check

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Smog Check Assistant | $4.99 | per month |
| VIN Analyzer | $1.99 | one-time |
| Error Analyzer | $2.99 | one-time |
| Advance Engine Values | $4.99 | one-time |


### PRIME _

[App page](https://appshunter.io/ios/app/prime/id6557068660)

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

**In-app purchases:** none


## Frequently asked questions

### Is ChkOBD OBD2 Analyzer free?

ChkOBD OBD2 Analyzer is free to download, with in-app purchases available.

### Is PRIME _ free?

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

### Do ChkOBD OBD2 Analyzer or PRIME _ have ads?

Neither ChkOBD OBD2 Analyzer nor PRIME _ shows ads.

### Which is updated more often, ChkOBD OBD2 Analyzer or PRIME _?

ChkOBD OBD2 Analyzer ships an update every 3 months, and PRIME _ every 4 months. Most recently, ChkOBD OBD2 Analyzer was updated on October 13, 2026 and PRIME _ 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.*