# ChkOBD OBD2 Analyzer vs INNOOBD+

The clearest difference is in-app purchases: INNOOBD+ at none against ChkOBD OBD2 Analyzer's 4. INNOOBD+ also leads on update cadence (every 2 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

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

ChkOBD OBD2 Analyzer ships an update every 3 months, INNOOBD+ every 2 weeks. The most recent releases landed on June 5, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | ChkOBD OBD2 Analyzer | INNOOBD+ |
| --- | --- | --- |
| 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 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 63 MB | 135 MB |
| Requires iOS | 13.0 | 13 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Check On-Board Diagnostics LLC](https://appshunter.io/developer/1511585010) | [Shenzhen Chaoyue Technology Development Co.,Ltd](https://appshunter.io/developer/1223781320) |

## 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 |


### INNOOBD+

[App page](https://appshunter.io/ios/app/innoobd-plus/id6683303203)

**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 INNOOBD+ free?

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

### Do ChkOBD OBD2 Analyzer or INNOOBD+ have ads?

Neither ChkOBD OBD2 Analyzer nor INNOOBD+ shows ads.

### Which is updated more often, ChkOBD OBD2 Analyzer or INNOOBD+?

ChkOBD OBD2 Analyzer ships an update every 3 months, and INNOOBD+ every 2 weeks. Most recently, ChkOBD OBD2 Analyzer was updated on June 5, 2026 and INNOOBD+ on September 18, 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.*