Comparison

Roamer BMS vs LTW 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

LTW BMS

Features
Read full description

The LTW BMS is connected to the battery pack through Bluetooth to monitor the status of the battery pack and provide monitoring means for the management of the lithium battery system. 1. Real-time display of SOC, voltage, current, temperature and other battery pack information in the form of ring and digital display; 2. Displays the real-time voltage of a single battery, protection status and alarm status of the battery string. 3. Display the status of the charge/discharge switch and battery balance.

Screenshots

Roamer BMS4 screens
LTW BMS3 screens

Verdict

The call

The clearest difference is update cadence: Roamer BMS at every 2 weeks against LTW BMS's every 14 months. LTW BMS's advantage is iOS requirement (9.0 vs 11.0). 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, LTW BMS every 14 months. The most recent releases landed on October 15, 2026 and October 11, 2026 respectively.

Scorecard2 real differences ยท 6 level
Roamer BMS versus LTW BMS: the parameters behind the verdict, then further details
ParameterRoamer BMSLTW BMS
PriceFreeFree
Positive reviews16.7% of reviewsโ€”
Update frequencyEvery 2 weeks โ€” betterEvery 14 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeโ€”
DevicesiPhone, iPodiPhone, iPad, iPod โ€” better
Requires iOS11.09.0 โ€” better
Further details โ€” not scored
Size5 MB3 MB
Age rating4+4+
Developerๆญฅๆณฝ ็Ž‹Shenzhen LTW Electronic Technology Co., Ltd.

In-app purchases

None

Roamer BMS

No in-app purchases

None

LTW BMS

No in-app purchases

Questions

Is Roamer BMS free?
Roamer BMS is free to download, with no in-app purchases.
Is LTW BMS free?
LTW BMS is free to download, with no in-app purchases.
Do Roamer BMS or LTW BMS have ads?
Neither Roamer BMS nor LTW BMS shows ads.
Which is updated more often, Roamer BMS or LTW BMS?
Roamer BMS ships an update every 2 weeks, and LTW BMS every 14 months. Most recently, Roamer BMS was updated on October 15, 2026 and LTW BMS on October 11, 2026.

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