# OBD Compass vs OBD Vault

The clearest difference is in-app purchases: OBD Compass at none against OBD Vault's 9. OBD Compass also leads on iOS requirement (13.0 vs 15.0). OBD Vault's advantage is update cadence (every 4 days vs monthly). On price, ads and device support there is nothing between them.

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

OBD Compass ships an update monthly, OBD Vault every 4 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | OBD Compass | OBD Vault |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Size | 25 MB | 40 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HK TOPDON TECHNOLOGY Co., LIMITED](https://appshunter.io/developer/1846276192) | [Bahdan Hal](https://appshunter.io/developer/6808813418) |

## What reviewers say

### OBD Compass

[App page](https://appshunter.io/ios/app/obd-compass/id6758076036)

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

**In-app purchases:** none


### OBD Vault

[App page](https://appshunter.io/ios/app/obd-vault-diagnostics-and-mcp/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 OBD Compass free?

OBD Compass 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 OBD Compass or OBD Vault have ads?

Neither OBD Compass nor OBD Vault shows ads.

### Which is updated more often, OBD Compass or OBD Vault?

OBD Compass ships an update monthly, and OBD Vault every 4 days. Most recently, OBD Compass was updated on October 31, 2026 and OBD Vault on November 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*