Comparison

BMS Tool vs EWATT

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

Head to head

BMS Tool

Bluetooth Battery Monitor

Free

🔧 Utilities

★ 3.97 ratingsView app →

ewatt

About

BMS Tool

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

Read full description

Universal BMS (Battery Management) monitoring app. Actual functionality: - Screen Always ON mode - Multiple BMS View / support - Read only support for Liontron BMS - Read only support for XiaoXiang BMS - Read only support for ANT BMS - Read only support for Wattstunde LiFePo4 batteries - Support for macOS Functionality Requests please submit on GitHub.

About

EWATT

Features

Read full description

本应用是用于智能锂电池管理系统的工具软件。App使用低功耗蓝牙与电池管理系统（BMS）建立连接，可通过手机设备读取电池信息。

Screenshots

BMS Tool4 screens

EWATT4 screens

Verdict

The call

The clearest difference is in-app purchases: EWATT at none against BMS Tool's 1. EWATT also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.2). On price, update cadence and device support 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. BMS Tool sells 1 one-off in-app purchase. EWATT asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 16, 2026 and September 7, 2026 respectively.

Scorecard3 real differences · 7 level

BMS Tool versus EWATT: the parameters behind the verdict, then further details
Parameter	BMS Tool	EWATT
Price	Free	Free
Rating	3.9 (7 ratings) — better	—
Positive reviews	71.4% of reviews	—
Number of ratings	7 — better	—
Update frequency	Every 2 months	Every 2 months
Ads	Yes	No — better
In-app purchases	Yes	No — better
Monetization	Free with in-app purchases	—
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	15.2	13.0 — better
Further details — not scored
Size	9 MB	24 MB
Age rating	4+	17+
Developer	e77code GmbH	帆刘

In-app purchases

1 purchases

BMS Tool

One-time1

Remove Ads$1.99

None

EWATT

No in-app purchases

Questions

Is BMS Tool free?

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

Is EWATT free?

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

Do BMS Tool or EWATT have ads?

BMS Tool shows ads; EWATT does not.

Which is updated more often, BMS Tool or EWATT?

BMS Tool ships an update every 2 months, and EWATT every 2 months. Most recently, BMS Tool was updated on September 16, 2026 and EWATT on September 7, 2026.