# 123SmartBMS vs metr.at

123SmartBMS and metr.at both sit at 4.5 stars, but that hides the real split: 88% of metr.at's written reviews are positive against 67% of 123SmartBMS's. metr.at also leads on device support (4 vs 2) and iOS requirement (12.0 vs 16.0). On price, rating, ratings volume and update cadence there is nothing between them.

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

metr.at holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 21 and 19 respectively. Written reviews point the same way: 67% of 123SmartBMS's written reviews are positive against 88% of metr.at's.

123SmartBMS ships an update monthly, metr.at every 4 weeks. The most recent releases landed on September 20, 2026 and July 4, 2026 respectively.

## The numbers

| Metric | 123SmartBMS | metr.at |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (21 ratings)](https://appshunter.io/ios/app/123smartbms/id988285264/reviews) | **[4.7 (19 ratings)](https://appshunter.io/ios/app/metrat/id1165745913/reviews)** |
| Number of ratings | **21** | 19 |
| Positive reviews | 66.7% of reviews | **87.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 weeks** |
| Monetization | Free | Free |
| Size | 190 MB | 65 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Albertronic B.V.](https://appshunter.io/developer/890882604) | [Voyage Systems AB](https://appshunter.io/developer/1710124681) |

## What reviewers say

### 123SmartBMS

[App page](https://appshunter.io/ios/app/123smartbms/id988285264)

This app monitors and manages lithium battery packs, ensuring optimal condition and extended lifespan. It tracks cell voltages, temperatures, and currents, while balancing cells during charging. Connect via Bluetooth to view real-time battery status and control charging/discharging.

**Highlights:** Monitors cell voltages and temperatures, Tracks in- and outgoing currents, Balances cells during charging, Bluetooth connectivity for real-time data, Controls charge/discharge signals, Extends battery pack lifespan

**Features:** macOS Compatibility

**In-app purchases:** none


### metr.at

[App page](https://appshunter.io/ios/app/metrat/id1165745913)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 123SmartBMS free?

123SmartBMS is free to download, with no in-app purchases.

### Is metr.at free?

metr.at is free to download, with no in-app purchases.

### Which has better reviews, 123SmartBMS or metr.at?

metr.at is rated higher. 123SmartBMS averages 4.5 out of 5 from 21 ratings, while metr.at averages 4.7 from 19 ratings.

### Do 123SmartBMS or metr.at have ads?

Neither 123SmartBMS nor metr.at shows ads.

### Which is updated more often, 123SmartBMS or metr.at?

123SmartBMS ships an update monthly, and metr.at every 4 weeks. Most recently, 123SmartBMS was updated on September 20, 2026 and metr.at on July 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*