Comparison

Roamer BMS vs MAP BMS

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Roamer BMS

Monitor your LiFePO4 batteries wirelessly from your iPhone. View real-time state of charge, voltage, current, and internal cell voltages. Compatible only with second-generation Roamer Batteries Smart BMS.

Highlights
  • Wireless Bluetooth connection
  • Real-time battery monitoring
  • State of charge display
  • Voltage and current readings
  • Internal cell voltage display
  • BMS parameter adjustment (admin)
Features
Read full description

The Roamer BMS app allows you to monitor LiFePO4 batteries equipped with the new Roamer Batteries Smart BMS. Please note, this app is only suitable for second-generation Roamer Batteries. Other brands or first-generation models are not compatible. FEATURES No need for a separate battery monitor Wirelessly connect to your battery from your iPhone Monitor your battery state of charge, voltage and current in real time Displays internal battery status including cell voltages Change BMS parameters using admin password (request from Roamer) PLEASE NOTE The iPhone requires Bluetooth 5.0 with BLE functions You must accept all security permissions when requested or the app will not work Operating distance should be less than 10m The app will only connect with one battery at a time If you want to connect with another iPhone, please shutdown the app on the first iPhone The password for the Details page is in the user guide which can be downloaded from www.roamerbatteries.com/support/quick-start The password for the parameters page can be requested from Roamer. This is an admin only page, changing parameters without permission from Roamer can invalidate your battery warranty. ย  Offered by Roamer Batteries Ltd

About

MAP BMS

Features
Read full description

1. The uniqueness of the Bluetooth name ensures that the user can accurately connect and manage the corresponding lithium battery pack. 2. The information visualization query management of the battery can be carried out, and the user can query the relevant status of each string of battery packs, and replace or maintain the abnormal battery. 3. Security setting and reading battery protection parameters, users can set parameters and need to enter a password to modify the parameters. 4. Monitor battery failure alarms and display the current battery failures and the number of failures.

Screenshots

Roamer BMS4 screens
MAP BMS4 screens

Verdict

The call

The clearest difference is update cadence: Roamer BMS at every 2 weeks against MAP BMS's every 13 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Roamer BMS ships an update every 2 weeks, MAP BMS every 13 months. The most recent releases landed on September 30, 2026 and October 4, 2026 respectively.

Scorecard1 real difference ยท 7 level
Roamer BMS versus MAP BMS: the parameters behind the verdict, then further details
ParameterRoamer BMSMAP BMS
PriceFreeFree
Positive reviews16.7% of reviewsโ€”
Update frequencyEvery 2 weeks โ€” betterEvery 13 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeโ€”
DevicesiPhone, iPodiPhone, iPod
Requires iOS11.011.0
Further details โ€” not scored
Size5 MB48 MB
Age rating4+4+
Developerๆญฅๆณฝ ็Ž‹Haidi Energy Tehcnogy Co., Ltd

In-app purchases

None

Roamer BMS

No in-app purchases

None

MAP BMS

No in-app purchases

Questions

Is Roamer BMS free?
Roamer BMS is free to download, with no in-app purchases.
Is MAP BMS free?
MAP BMS is free to download, with no in-app purchases.
Do Roamer BMS or MAP BMS have ads?
Neither Roamer BMS nor MAP BMS shows ads.
Which is updated more often, Roamer BMS or MAP BMS?
Roamer BMS ships an update every 2 weeks, and MAP BMS every 13 months. Most recently, Roamer BMS was updated on September 30, 2026 and MAP BMS on October 4, 2026.

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