Reviews of ANCEL BM300 Pro

By: OBDSPACE TECHNOLOGY CO.,LTD App

List of user reviews and ratings for ANCEL BM300 Pro

Total ratings

2.80 (Rating count: 21)

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Review summary

The app excels at near-vehicle monitoring with continuous voltage data and easy data export, plus active development and good data merging. However, reliability challenges persist: crashes causing data loss, inconsistent reconnection, and occasional data accuracy issues (SoC vs voltage).

Pros

Automatic near-vehicle updates with continuous voltage data logging.
Data export options to Excel (.xls/.xlsx) and easy sharing.
Active development with regular app updates.
Seamless merging of new data with existing data for a long, continuous record.

Cons

App crashes and can lead to data loss.
Reconnection/reliability issues after leaving the device or re-pairing (requires force close or restart).
Some data readings are inaccurate (e.g., SoC shown as 100% due to reading alternator voltage).

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User Reviews

Recent rating average: 2.90

All time rating average: 2.80

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36% (4)

Date	Author	Comment
2026-06-27	Sc*****	Expensive paperweight, Bluetooth does not connect to my iPhone or Android phones, useless. I’ve reinstalled both the app and the device several times on both my phones and no resolution. AI says a lot of people have lots issues and complaints about the weak Bluetooth on this model.
Expensive paperweight, Bluetooth does not connect to my iPhone or Android phones, useless. I’ve reinstalled both the app and the device several times on both my phones and no resolution. AI says a lot of people have lots issues and complaints about the weak Bluetooth on this model.
2026-04-18	Bu*****	I have used this device for over one month. I had trouble auto-pairing only once, but that was probably user error. The device auto pairs if you walk next to the car and just wait for a while. The app seamlessly fetches new data and merges it with data that is already on the phone, so you get a continuous record of voltage every two minutes for as many days as you want. I AirDrop the exported .xls file onto a Mac and look at it with Numbers. A comma-delimited “.csv” plain text file would be a more flexible option for just the voltage, SOC, and temperature data. However, the report has several separate tables, so an .xls file may be necessary. I do not like their privacy policy because they collect (and almost surely sell) GPS assisted trip information tied to the serial number of your device. I have set the iPhone Settings (not the app Settings) to not allow GPS for this app, which disables the trip and find your car “features”. The voltage data logging, which is all I need, still works perfectly. Five stars if they change their privacy policy.
I have used this device for over one month. I had trouble auto-pairing only once, but that was probably user error. The device auto pairs if you walk next to the car and just wait for a while. The app seamlessly fetches new data and merges it with data that is already on the phone, so you get a continuous record of voltage every two minutes for as many days as you want. I AirDrop the exported .xls file onto a Mac and look at it with Numbers. A comma-delimited “.csv” plain text file would be a more flexible option for just the voltage, SOC, and temperature data. However, the report has several separate tables, so an .xls file may be necessary. I do not like their privacy policy because they collect (and almost surely sell) GPS assisted trip information tied to the serial number of your device. I have set the iPhone Settings (not the app Settings) to not allow GPS for this app, which disables the trip and find your car “features”. The voltage data logging, which is all I need, still works perfectly. Five stars if they change their privacy policy.
2026-04-01	R0*****	I’m not sure why this app has a low rating – it does everything it’s supposed to and works great for me at least! Every time I walk by my vehicle, the app updates and keeps me apprised of the state of my battery, which is exactly what I’m looking for. The developer updates the app regularly so I’m not sure what more we could ask for – thanks for a great app!
I’m not sure why this app has a low rating – it does everything it’s supposed to and works great for me at least! Every time I walk by my vehicle, the app updates and keeps me apprised of the state of my battery, which is exactly what I’m looking for. The developer updates the app regularly so I’m not sure what more we could ask for – thanks for a great app!
2026-03-27	De*****	I don’t know why others have had so many problem but this App works great for me. Whenever I walk by the car the app updates. Maybe they aren’t hanging around long enough? It gives me all the data I’m looking for and I can export it out as an xlsx file and email it to myself. Great info. I’m really impressed.
I don’t know why others have had so many problem but this App works great for me. Whenever I walk by the car the app updates. Maybe they aren’t hanging around long enough? It gives me all the data I’m looking for and I can export it out as an xlsx file and email it to myself. Great info. I’m really impressed.
2026-01-12	EP*****	Have two devices. It crashes. I am losing data. Have to unplug it, pair it again and start over. Trying to get the data for the service to show the reason why car is having parasitic draw and can’t. Very disappointing with the device. But very good idea. Something is going with implementation.
Have two devices. It crashes. I am losing data. Have to unplug it, pair it again and start over. Trying to get the data for the service to show the reason why car is having parasitic draw and can’t. Very disappointing with the device. But very good idea. Something is going with implementation.
2025-10-17	Do*****	App incorrectly shows SoC 100% while vehicle is running because it is reading alternator voltage and not battery SoC.
App incorrectly shows SoC 100% while vehicle is running because it is reading alternator voltage and not battery SoC.
2025-10-03	It*****	Great device to keep an eye on your batteries state. No surprises one morning.
Great device to keep an eye on your batteries state. No surprises one morning.
2025-06-09	Jr*****	App keeps crashing !
App keeps crashing !
2024-08-27	BL*****	Can’t even use the app with the device. It sees the device and the voltage during setup but once you have serial number it tries to connect to somewhere and says Network Error! And nothing anywhere tells me how to fix this even when I have tried 5 different network connections on my iPhone. Worthless.
Can’t even use the app with the device. It sees the device and the voltage during setup but once you have serial number it tries to connect to somewhere and says Network Error! And nothing anywhere tells me how to fix this even when I have tried 5 different network connections on my iPhone. Worthless.
2024-08-11	tj*****	Definitely needs work when it comes to reconnecting. Please fix this.
Definitely needs work when it comes to reconnecting. Please fix this.