# ChkOBD OBD2 Analyzer vs LookLockdown

The clearest difference is update cadence: LookLockdown at monthly against ChkOBD OBD2 Analyzer's every 3 months. ChkOBD OBD2 Analyzer's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases 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 and LookLockdown sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ChkOBD OBD2 Analyzer ships an update every 3 months, LookLockdown monthly. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ChkOBD OBD2 Analyzer | LookLockdown |
| --- | --- | --- |
| 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 | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 63 MB | 14 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Check On-Board Diagnostics LLC](https://appshunter.io/developer/1511585010) | [昊 陆](https://appshunter.io/developer/1398172088) |

## 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 |


### LookLockdown

[App page](https://appshunter.io/ios/app/looklockdown/id6736931869)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Lifetime | $4.99 | one-time |


## Frequently asked questions

### Is ChkOBD OBD2 Analyzer free?

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

### Is LookLockdown free?

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

### Do ChkOBD OBD2 Analyzer or LookLockdown have ads?

Neither ChkOBD OBD2 Analyzer nor LookLockdown shows ads.

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

ChkOBD OBD2 Analyzer ships an update every 3 months, and LookLockdown monthly. Most recently, ChkOBD OBD2 Analyzer was updated on October 13, 2026 and LookLockdown on October 25, 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.*