Comparison

metr.at vs BMS Tool

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

Head to head
About

metr.at

This app measures and records electrical data like current, voltage, and RPM for compatible devices. It allows users to track routes on Google Maps, view detailed charts, and create videos with data overlays. Users can also share their recorded data and adjust speed modes.

Highlights
  • Measure current, voltage, RPM, speed
  • Record and upload data online
  • Track route on Google Maps
  • View detailed interactive charts
  • Share data links
  • Change speed modes
  • Create videos with data overlay
Features
Read full description

Compatible with VESC®* Open Source Controller. • measure current, voltage, RPM, speed, etc • record and upload online • track route on google maps • view detailed and interactive chart • share the link with anyone • change speed modes (Slow, Normal, Fast, etc) • make videos with overlay Purchase Metr Pro Bluetooth module at Official shop https://voyagesystems.eu *VESC® is a registered Trademark owned by Benjamin Vedder. TM policies can be found here: http://www.vesc-project.com/trademark_policies

About

BMS Tool

Monitor your battery management systems via Bluetooth. Supports multiple BMS types including Liontron, XiaoXiang, ANT, and Wattstunde. Offers a screen always-on mode and macOS compatibility.

Highlights
  • Screen Always ON mode
  • Multiple BMS support
  • Liontron BMS read-only
  • XiaoXiang BMS read-only
  • ANT BMS read-only
  • Wattstunde LiFePo4 read-only
  • macOS support
Features
Read full description

BMS Tool shows the state of your battery from its battery management system (BMS) over Bluetooth, on the iPhone, the iPad, the Mac and the Apple Watch. Supported BMS: - JBD / XiaoXiang smart BMS, also in Liontron batteries - JK BMS (Jikong) - ANT BMS, the older boards and the newer ANT-BLE boards - Seplos V2 and V3 - Redodo, LiTime, PowerQueen and Starry Sea batteries - WattCycle batteries - Wattstunde LiFePO4 and Wattstunde Nova Core batteries - Ective, LiFeBlue, KiloVault, Enerdrive, Noovi and StartCraft batteries Features: - Charge, voltage, current and power at a glance - Time until full while charging and until empty while discharging, estimated from the present current - Every cell voltage with minimum, maximum, difference and balancing - Temperature sensors, alarms and BMS information - Several batteries in one list, each with its own name - Search for new devices can be switched off: only your own batteries stay in the list - Session values and a CSV log of the readings - Home screen widget - Apple Watch app with complications: charge, cells, temperatures and alarms of the battery open on the iPhone - The display can stay on while the app is open The app reads the values of the BMS and does not change its settings. Ideas and requests are welcome at web.e77code.com/bms-tool.

Screenshots

metr.at3 screens
BMS Tool3 screens

Verdict

The call

The clearest difference is rating: metr.at at 4.7 against BMS Tool's 3.9. metr.at also leads on in-app purchases (none vs 1) and ads (none vs shown). On price, ratings volume, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. BMS Tool sells 1 one-off in-app purchase. metr.at asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

metr.at holds the better App Store score, 4.7 against 3.9. Both are backed by a comparable volume of ratings — 19 and 7 respectively. Written reviews point the same way: 88% of metr.at's written reviews are positive against 71% of BMS Tool's.

UpkeepUpdate frequency

metr.at ships an update every 4 weeks, BMS Tool every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
metr.at versus BMS Tool: the parameters behind the verdict, then further details
Parametermetr.atBMS Tool
PriceFreeFree
Rating4.7 (19 ratings) — better3.9 (7 ratings)
Positive reviews87.5% of reviews — better71.4% of reviews
Number of ratings19 — better7
Update frequencyEvery 4 weeks — betterEvery 2 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple WatchiPhone, iPad, iPod, Apple Watch
Requires iOS12.0 — better15.0
Further details — not scored
Size65 MB20 MB
Age rating4+4+
DeveloperVoyage Systems ABe77code GmbH

Customer experience

metr.at

All ratings19 ratings
Positive89.5%
Neutral5.3%
Negative5.3%
Written reviews8 reviews
Positive87.5%
Neutral0.0%
Negative12.5%

BMS Tool

All ratings7 ratings
Positive71.4%
Neutral0.0%
Negative28.6%
Written reviews7 reviews
Positive71.4%
Neutral14.3%
Negative14.3%

In-app purchases

None

metr.at

No in-app purchases

1 purchases

BMS Tool

One-time1
  • Remove Ads$3.99

Questions

Is metr.at free?
metr.at is free to download, with no in-app purchases.
Is BMS Tool free?
BMS Tool is free to download, with in-app purchases available.
Which has better reviews, metr.at or BMS Tool?
metr.at is rated higher. metr.at averages 4.7 out of 5 from 19 ratings, while BMS Tool averages 3.9 from 7 ratings.
Do metr.at or BMS Tool have ads?
BMS Tool shows ads; metr.at does not.
Which is updated more often, metr.at or BMS Tool?
metr.at ships an update every 4 weeks, and BMS Tool every 2 months. Most recently, metr.at was updated on November 2, 2026 and BMS Tool on November 3, 2026.

Other comparisons