# BM500 vs OBDII Scanner ELM327 OBD2

The clearest difference is rating: OBDII Scanner ELM327 OBD2 at 3.6 against BM500's 3.0. OBDII Scanner ELM327 OBD2 also leads on update cadence (every 2 days vs fortnightly) and ratings volume (8 vs 2). BM500's advantage is in-app purchases (none vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. OBDII Scanner ELM327 OBD2 sells 1 one-off in-app purchase. BM500 asks for nothing beyond the download.

OBDII Scanner ELM327 OBD2 holds the better App Store score, 3.6 against 3.0. Both are backed by a comparable volume of ratings — 2 and 8 respectively.

BM500 ships an update fortnightly, OBDII Scanner ELM327 OBD2 every 2 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | BM500 | OBDII Scanner ELM327 OBD2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/bm500/id1557463189/reviews) | **[3.6 (8 ratings)](https://appshunter.io/ios/app/obdii-scanner-elm327-obd2/id6450936937/reviews)** |
| Number of ratings | 2 | **8** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 8 MB | 14 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [亮 侯](https://appshunter.io/developer/616725498) | [paul moore](https://appshunter.io/developer/1655343480) |

## 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


### OBDII Scanner ELM327 OBD2

[App page](https://appshunter.io/ios/app/obdii-scanner-elm327-obd2/id6450936937)

This app allows you to scan your car's trouble codes and view live data using an OBD2 Bluetooth adapter. It logs statistics and freeze frames for future reference, storing all diagnostic trouble codes (DTCs) on a server.

**Highlights:** Scan car trouble codes, View live data, Log live statistics, Log freeze frame data, Store DTCs on server, Bluetooth and WiFi support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UK | $1.99 | one-time |


## Frequently asked questions

### Is BM500 free?

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

### Is OBDII Scanner ELM327 OBD2 free?

OBDII Scanner ELM327 OBD2 is free to download, with in-app purchases available.

### Which has better reviews, BM500 or OBDII Scanner ELM327 OBD2?

OBDII Scanner ELM327 OBD2 is rated higher. BM500 averages 3.0 out of 5 from 2 ratings, while OBDII Scanner ELM327 OBD2 averages 3.6 from 8 ratings.

### Do BM500 or OBDII Scanner ELM327 OBD2 have ads?

Neither BM500 nor OBDII Scanner ELM327 OBD2 shows ads.

### Which is updated more often, BM500 or OBDII Scanner ELM327 OBD2?

BM500 ships an update fortnightly, and OBDII Scanner ELM327 OBD2 every 2 days. Most recently, BM500 was updated on October 24, 2026 and OBDII Scanner ELM327 OBD2 on October 24, 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.*