OBD2 Scanner ELM327 vs BM500
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OBD2 Scanner ELM327
This app provides comprehensive OBD scanning for vehicles, allowing users to read and clear fault codes from various ECUs, monitor live sensor data, and perform special functions like DPF regeneration and injector coding. It supports over 100 vehicle makes and offers detailed reports and diagnostic assistance.
- Read and delete fault codes from any ECU
- Monitor over 200 live sensor data points
- Perform special OBD functions
- Generate shareable PDF diagnostic reports
- Check SMOG status for emission tests
- Reset service/oil lights
- Track 0-60 and 0-100 timing
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GaragePro is the perfect OBD Scanning app for automotive enthusiasts, repair shops, and DIYers. Covering 100+ vehicle makes, GaragePro offers you comprehensive OBD coverage such as reading fault codes from all ECUs- Engine, Airbag, ABS, BCM etc., as well as Special functions such as Injector coding, DPF regeneration, Throttle Reset, ABS (Brake) bleeding, Steering angle reset etc. Key Features: OBD2 Scanning: Read and delete fault codes from any module- Engine, ABS, SRS, EPS, BCM and more. GaragePro can read OBD codes from 100s of ECUs across different makes, covering 100,000+ unique DTCs. Live Data Monitoring: Read over 200 live data points from vehicle sensors in real-time, including RPM, speed, coolant temperature, fuel trim etc. as well as vehicle specific live sensor data points. GaragePro OBD2 Scanner also has intuitive graphs and customizable displays, that let your visualize changes in your OBD2 data. You can also export PID readings to Excel or PDF for detailed analyses. Multi-Mode Coverage: Unlock more OBD2 modes than other apps. GaragePro offers access to a plethora of modes/service IDs such as modes 01, 02, 03, 04, 06, 07, 09, 0A, as well as vehicle specific modes for enhanced OBD coverage. Special OBD functions like Injector coding, DPF regeneration, Throttle Reset, ABS (Brake) bleeding, Steering angle reset, Power balance, Fuel Density Reset, Learning Value Reset, Actuation Tests, AC Control Module Reset, Indicator light reset, Brake Pedal Position Sensor learning, Light and Door customizations, etc. Check the app for the full list applicable to your car. PDF report and Support: Get a shareable PDF with code descriptions when scanning a vehicle and share it with your technicians, friends, customers or store it for future comparisons. GaragePro also offers email and chat support to its customers. Smog checks through OBD: Be ready for your vehicle's emission tests by checking SMOG status in the app. Service/Oil reset: GaragePro OBD2 Scanner includes both- Auto and manual methods to reset the Service/Oil lights. Check Engine Light/Dashboard Lights Assistance: Compared to other apps, GaragePro is able to cover not just MIL, but also ABS, airbag, oil level, steering and other warning lights. OBD Freeze Frame data: Read OBD freeze frame data to understand your sensors' state when OBD codes were generated. Track mode: Measure your 0-60, 0-100 timing and see how well you do on the track. Vehicle Compatibility: The GaragePro OBD2 Scanner app works with any vehicle that's compliant with the OBD2 standard (introduced in the USA in 1996). It reads data from 100s of ECUs in cars & bikes, including Engine, ABS, Airbags (SRS), EPS, BCM, Traction Control, Transmission, HVAC, Instrument cluster & more. It is compatible with all American, Japanese, Korean, German, and other European car & bike makes, including but not limited to GM, Toyota, Ford, Lincoln, Buick, Chevrolet , Opel, Nissan, Infinity, Renault, Mercedes, Suzuki, Lexus, Triumph, Hyundai, Kia, Mazda, Honda, Mahindra, Tata, MG, Volkswagen, Audi, Skoda, Seat, BMW and more. For motorcycles, you will need a connecting cable that connects the 16-pin OBD scanner with the bike's OBD port. Bike diagnostics include DTC reading & deletion, live data stream & freeze frame data. OBD Scanner Compatibility: GaragePro OBD2 Scanner works with any Bluetooth OBD Scanner, including most elm327 based OBD scanners. It also works with popular OBD scanners like Vlink, OBDLink, Carista, Veepeak, Viecar, Kiwi and more. GaragePro also has its own OBD2 Scanner that works seamlessly with the app. Please note: The availability of sensor data depends on your vehicle's ECUs. The app can only display information that is provided by your car's systems. Whether you're a car enthusiast seeking performance gains, a mechanic looking to tackle repairs, or a car owner committed to staying informed, GaragePro OBD2 Scanner is the perfect OBD2 diagnostic tool for you. Email support: fix@carpm.in
BM500
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.
- Bluetooth connectivity to battery testers
- Battery condition testing
- Cranking system testing
- Charging system testing
- Save test data
- Share professional results
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BM500 is the App used for Bluetooth battery tester. It connects battery tester devices via Bluetooth. User can easily do test on battery condition, cranking and charging systems. All data can be saved and historical professional result can be shared.
Screenshots
Verdict
The clearest difference is review sentiment: OBD2 Scanner ELM327 at 46% against BM500's 0%. OBD2 Scanner ELM327 also leads on rating (4.3 vs 3.0) and ratings volume (25 vs 2). BM500's advantage is in-app purchases (none vs 10). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. OBD2 Scanner ELM327 sells 10 in-app purchases, starting at $4.99 per year. BM500 asks for nothing beyond the download.
OBD2 Scanner ELM327 holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: OBD2 Scanner ELM327 has 25 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 46% of OBD2 Scanner ELM327's written reviews are positive against 0% of BM500's.
OBD2 Scanner ELM327 ships an update every 3 weeks, BM500 fortnightly. Both last shipped on November 3, 2026.
| Parameter | OBD2 Scanner ELM327 | BM500 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (25 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 46.2% of reviews — better | 0.0% of reviews |
| Number of ratings | 25 — better | 2 |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 65 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Zymbia Interactive Technologies Private Limited | 亮 侯 |
Customer experience
OBD2 Scanner ELM327
BM500
Bugs and requests
OBD2 Scanner ELM327
Reported bugs
21 issues- App stops working
- App does not load past splash screen
- App is not responding properly
- App crashes when trying to buy subscription
- App starts crashing after a few days
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- License removed after uninstall/reinstall
- App does not start after downloading
- Shows false error codes
- Requires uninstall to connect
- App closes and won't open
- Cannot clear codes after paying for subscription
- Scanning issue (stops at 4%)
- App hangs at 5% during scan
- Freezes or gives an error during scan
- Most GM PIDs not available
- Live View Advanced PIDs missing
- Cannot pull or clear codes
- Not functional after updates
- Cannot link to iPhone
- Not working on multiple car models
- Service reset states not available after payment
Requested features
8 requests- DPF REGEN feature
- Ability to select new vehicle easily
- Reactivate perpetual license without reinstalling
- List of approved scanner devices
- Support for WiFi adapters on iOS
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- Add Google ID option for iPhone
- Fix PIDs missing in Live View Advanced
- Option to store data locally instead of server
BM500
Not enough reviews yet to summarise bugs or requests.
In-app purchases
OBD2 Scanner ELM327
- AI Scan Summary (Yearly)$4.991 Year
- Personal Plan$9.991 Year
- Lite - Yearly$9.991 Year
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- Premium - Yearly$32.991 Year
- Standard - Yearly$34.991 Year
- Lite - Perpetual$17.99
- Lite - Perpetual$21.99
- Standard - Perpetual$54.99
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- Standard - Perpetual$69.99
- Advanced - Perpetual$159.99
BM500
No in-app purchases
Questions
Is OBD2 Scanner ELM327 free?
Is BM500 free?
Which has better reviews, OBD2 Scanner ELM327 or BM500?
Do OBD2 Scanner ELM327 or BM500 have ads?
Which is updated more often, OBD2 Scanner ELM327 or BM500?
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