Comparison

123SmartBMS vs YY BMS

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

Head to head
About

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.

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
Read 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.

About

YY BMS

Features
Read full description

Yanyang BMS, Your Battery Management Platform 【Dynamic Monitoring】 You can access the APP at any time and anywhere to view detailed data such as voltage, current, temperature, capacity, and SOC; 【Battery Parameter Modification】 Depending on the application scenario, you can modify the battery type, series number, and various alarm values for voltage and current; 【Real-time Control】 Once you connect the battery to the APP at any time and anywhere, you can control the charging and discharging status of the battery.

Screenshots

123SmartBMS4 screens
YY BMS3 screens

Verdict

The call

The clearest difference is iOS requirement: YY BMS at 13.0 against 123SmartBMS's 16.0. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

123SmartBMS ships an update monthly, YY BMS every 6 weeks. The most recent releases landed on September 20, 2026 and September 21, 2026 respectively.

Scorecard1 real difference · 9 level
123SmartBMS versus YY BMS: the parameters behind the verdict, then further details
Parameter123SmartBMSYY BMS
PriceFreeFree
Rating4.5 (21 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings21 — better—
Update frequencyMonthly — betterEvery 6 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.013.0 — better
Further details — not scored
Size190 MB30 MB
Age rating4+4+
DeveloperAlbertronic B.V.Wuhan Yanyang IoT Technology Co., Ltd.

In-app purchases

None

123SmartBMS

No in-app purchases

None

YY BMS

No in-app purchases

Questions

Is 123SmartBMS free?
123SmartBMS is free to download, with no in-app purchases.
Is YY BMS free?
YY BMS is free to download, with no in-app purchases.
Do 123SmartBMS or YY BMS have ads?
Neither 123SmartBMS nor YY BMS shows ads.
Which is updated more often, 123SmartBMS or YY BMS?
123SmartBMS ships an update monthly, and YY BMS every 6 weeks. Most recently, 123SmartBMS was updated on September 20, 2026 and YY BMS on September 21, 2026.

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