# OBD2 Cat vs OBD Vault

The clearest difference is in-app purchases: OBD2 Cat at none against OBD Vault's 9. OBD Vault's advantage is update cadence (weekly vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. OBD Vault sells 9 in-app purchases, starting at $2.99 per month. OBD2 Cat asks for nothing beyond the download.

OBD2 Cat ships an update fortnightly, OBD Vault weekly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | OBD2 Cat | OBD Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/obd2-cat-car-scanner/id6751106245/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free | — |
| Size | 15 MB | 41 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roman Tikhonychev](https://appshunter.io/developer/1833446011) | [Bahdan Hal](https://appshunter.io/developer/6808813418) |

## What reviewers say

### OBD2 Cat

[App page](https://appshunter.io/ios/app/obd2-cat-car-scanner/id6751106245)

This app reads diagnostic trouble codes and live vehicle data from compatible cars using a Bluetooth OBD2 adapter. It helps drivers understand dashboard warnings by checking engine codes, viewing sensor data, and retrieving vehicle identification information.

**Highlights:** Read diagnostic trouble codes (DTCs), Clear supported trouble codes, View live engine and sensor data, Check VIN, make, model, and year, Auto Scan for codes, View OBD protocol and connection status

**In-app purchases:** none


### OBD Vault

[App page](https://appshunter.io/ios/app/obd-vault/id6808813416)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 vehicle · Per month | $2.99 | per month |
| 3 vehicles · Per month | $5.99 | per month |
| 10 vehicles · Per month | $14.95 | per month |
| 1 vehicle · Per year | $17.99 | per year |
| 3 vehicles · Per year | $35.99 | per year |
| 10 vehicles · Per year | $89.99 | per year |
| 1 vehicle · Lifetime | $34.99 | one-time |
| 3 vehicles · Lifetime | $69.99 | one-time |
| 10 vehicles · Lifetime | $174.99 | one-time |


## Frequently asked questions

### Is OBD2 Cat free?

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

### Is OBD Vault free?

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

### Do OBD2 Cat or OBD Vault have ads?

Neither OBD2 Cat nor OBD Vault shows ads.

### Which is updated more often, OBD2 Cat or OBD Vault?

OBD2 Cat ships an update fortnightly, and OBD Vault weekly. Most recently, OBD2 Cat was updated on October 30, 2026 and OBD Vault on October 31, 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.*