# BMS Tool vs OPTIMA Lithium Bluetooth

The clearest difference is review sentiment: BMS Tool at 71% against OPTIMA Lithium Bluetooth's 0%. BMS Tool also leads on rating (3.9 vs 3.7). OPTIMA Lithium Bluetooth's advantage is 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.

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

BMS Tool holds the better App Store score, 3.9 against 3.7. Both are backed by a comparable volume of ratings — 7 and 3 respectively. Written reviews point the same way: 71% of BMS Tool's written reviews are positive against 0% of OPTIMA Lithium Bluetooth's.

BMS Tool ships an update every 2 months, OPTIMA Lithium Bluetooth every 3 months. The most recent releases landed on September 16, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | BMS Tool | OPTIMA Lithium Bluetooth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (7 ratings)](https://appshunter.io/ios/app/bms-tool/id1511343379/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/optima-lithium-bluetooth/id6453360504/reviews) |
| Number of ratings | **7** | 3 |
| Positive reviews | **71.4% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 9 MB | 42 MB |
| Requires iOS | 15.2 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [e77code GmbH](https://appshunter.io/developer/1375405425) | [Clarios LLC](https://appshunter.io/developer/1481852921) |

## What reviewers say

### BMS Tool

[App page](https://appshunter.io/ios/app/bms-tool/id1511343379)

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:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### OPTIMA Lithium Bluetooth

[App page](https://appshunter.io/ios/app/optima-lithium-bluetooth/id6453360504)

Monitor your battery's real-time status, including charge level, voltage, and temperature. Receive safety alerts and customize battery names for easy identification. Connect wirelessly via Bluetooth for convenient access to all essential battery data.

**Highlights:** Real-time State of Charge (SOC), Real-time battery and cell voltages, Real-time internal battery temperature, Battery safety alerts, Customizable battery names

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BMS Tool free?

BMS Tool is free to download, with in-app purchases available.

### Is OPTIMA Lithium Bluetooth free?

OPTIMA Lithium Bluetooth is free to download, with no in-app purchases.

### Which has better reviews, BMS Tool or OPTIMA Lithium Bluetooth?

BMS Tool is rated higher. BMS Tool averages 3.9 out of 5 from 7 ratings, while OPTIMA Lithium Bluetooth averages 3.7 from 3 ratings.

### Do BMS Tool or OPTIMA Lithium Bluetooth have ads?

BMS Tool shows ads; OPTIMA Lithium Bluetooth does not.

### Which is updated more often, BMS Tool or OPTIMA Lithium Bluetooth?

BMS Tool ships an update every 2 months, and OPTIMA Lithium Bluetooth every 3 months. Most recently, BMS Tool was updated on September 16, 2026 and OPTIMA Lithium Bluetooth on June 1, 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.*