# BM500 vs OBDocker

The clearest difference is review sentiment: OBDocker at 47% against BM500's 0%. OBDocker also leads on rating (4.2 vs 3.0) and ratings volume (17 vs 2). BM500's advantage is in-app purchases (none vs 7). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. OBDocker sells 7 in-app purchases, starting at $2.99 per month. BM500 asks for nothing beyond the download.

OBDocker holds the better App Store score, 4.2 against 3.0. That said, the two scores are not equally well evidenced: OBDocker has 17 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of BM500's written reviews are positive against 47% of OBDocker's.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on September 16, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | BM500 | OBDocker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/bm500/id1557463189/reviews) | **[4.2 (17 ratings)](https://appshunter.io/ios/app/obdocker-obd2-car-scanner/id6466999549/reviews)** |
| Number of ratings | 2 | **17** |
| Positive reviews | 0.0% of reviews | **46.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | **Free** | Freemium |
| Size | 8 MB | 238 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [亮 侯](https://appshunter.io/developer/616725498) | [Motorsure. Inc](https://appshunter.io/developer/1707281085) |

## What reviewers say

### BM500

[App page](https://appshunter.io/ios/app/bm500/id1557463189)

This application connects to Bluetooth battery testers to perform comprehensive battery health checks. Users can easily test battery condition, cranking, and charging systems, with the ability to save and share professional results.

**Highlights:** Bluetooth connectivity to battery testers, Battery condition testing, Cranking system testing, Charging system testing, Save test data, Share professional results

**Features:** macOS Compatibility

**In-app purchases:** none


### OBDocker

[App page](https://appshunter.io/ios/app/obdocker-obd2-car-scanner/id6466999549)

This app acts as a professional OBD2 car scanner, enabling users to diagnose, service, and customize their vehicles. It offers comprehensive diagnostic modes, real-time data monitoring, and various service functions like oil resets and battery registration.

**Highlights:** Triple-mode diagnostics (Full-Systems, Multi-Systems, Quick Scan), Triple-mode live data monitoring (Health, Engine, Dash), Full-cycle service functions (Emissions Pre-Check, Control Tests, Oil Reset, Battery Registration), One-click car setting adjustments and retrofits, Supports a wide range of car brands and models

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OBD Pro (Monthly) | $2.99 | per month |
| OBD Pro Max (Monthly) | $7.99 | per month |
| OBD2 Pro (6 Months) | $14.99 | per 6 months |
| OBD Pro (Annual) | $17.99 | per year |
| Mechanic Access (Quarterly) | $19.99 | per 3 months |
| OBD Pro Max (Annual) | $47.99 | per year |
| OBD Pro Max (Permanent) | $119.99 | one-time |


## Frequently asked questions

### Is BM500 free?

BM500 is free to download, with no in-app purchases.

### Is OBDocker free?

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

### Which has better reviews, BM500 or OBDocker?

OBDocker is rated higher. BM500 averages 3.0 out of 5 from 2 ratings, while OBDocker averages 4.2 from 17 ratings.

### Do BM500 or OBDocker have ads?

Neither BM500 nor OBDocker shows ads.

### Which is updated more often, BM500 or OBDocker?

BM500 ships an update fortnightly, and OBDocker fortnightly. Most recently, BM500 was updated on September 16, 2026 and OBDocker on October 1, 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.*