# BMS Tool vs EnerKey

The clearest difference is rating: BMS Tool at 3.9 against EnerKey's 3.0. EnerKey's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, review sentiment, ratings volume and update cadence there is nothing between them.

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

BMS Tool holds the better App Store score, 3.9 against 3.0. Both are backed by a comparable volume of ratings — 7 and 3 respectively. Written reviews complicate that: 71% of BMS Tool's written reviews are positive against 75% of EnerKey's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 16, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | BMS Tool | EnerKey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (7 ratings)](https://appshunter.io/ios/app/bms-tool/id1511343379/reviews)** | [3.0 (3 ratings)](https://appshunter.io/ios/app/enerkey/id6447932138/reviews) |
| Number of ratings | **7** | 3 |
| Positive reviews | 71.4% of reviews | **75.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 9 MB | 31 MB |
| Requires iOS | 15.2 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [e77code GmbH](https://appshunter.io/developer/1375405425) | [Shenzhen Jinwei Power Source Technology Co., Ltd](https://appshunter.io/developer/1683049152) |

## 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 |


### EnerKey

[App page](https://appshunter.io/ios/app/enerkey/id6447932138)

Monitor and control your lithium battery system in real-time. View current status, historical data, and adjust protective parameters to ensure safe operation. Receive instant alerts for any abnormal conditions.

**Highlights:** Real-time battery monitoring, Historical data inquiry, Parameter setting, Alarm notifications, Voltage, current, and temperature display

**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 EnerKey free?

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

### Which has better reviews, BMS Tool or EnerKey?

BMS Tool is rated higher. BMS Tool averages 3.9 out of 5 from 7 ratings, while EnerKey averages 3.0 from 3 ratings.

### Do BMS Tool or EnerKey have ads?

BMS Tool shows ads; EnerKey does not.

### Which is updated more often, BMS Tool or EnerKey?

BMS Tool ships an update every 2 months, and EnerKey every 2 months. Most recently, BMS Tool was updated on September 16, 2026 and EnerKey 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.*