123SmartBMS vs metr.at
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
123SmartBMS
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.
- 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
Read full descriptionHide full description
123\SmartBMS is an easy to use yet advanced, modular BMS to keep your lithium batteries in perfect condition, increasing the lifespan of the battery pack. The system measures important data like cell voltages, cell temperatures and in- and outgoing currents. It also balances all cells to the same voltage during charging. The BMS supervises the whole battery pack and has two signal relays to indicate “allow to charge” and “allow to discharge”. These signal relays can control chargers and inverters with “enable”/”disable” signals or by connecting an energy efficient power relay to the signal relay. An example is the 123\SmartRelay. Easily connect your phone to the BMS using Bluetooth to see relevant information including state of charge, energy consumed, energy stored, in- and outgoing current, cell voltages and temperatures. With 123\SmartBMS, your battery pack is in safe hands.
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.
- 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
Read full descriptionHide 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
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | 123SmartBMS | metr.at |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (21 ratings) | 4.7 (19 ratings) — better |
| Positive reviews | 66.7% of reviews | 87.5% of reviews — better |
| Number of ratings | 21 — better | 19 |
| Update frequency | Monthly | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 16.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 190 MB | 65 MB |
| Age rating | 4+ | 4+ |
| Developer | Albertronic B.V. | Voyage Systems AB |
Customer experience
123SmartBMS
metr.at
In-app purchases
123SmartBMS
No in-app purchases
metr.at
No in-app purchases
