# PVbutler vs LanmaoBMS

The clearest difference is rating: LanmaoBMS at 5.0 against PVbutler's 2.9. LanmaoBMS also leads on update cadence (fortnightly vs every 3 months). PVbutler's advantage is ratings volume (15 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

LanmaoBMS holds the better App Store score, 5.0 against 2.9. That said, the two scores are not equally well evidenced: PVbutler has 15 ratings behind it against 1, so its average is the more settled of the two.

PVbutler ships an update every 3 months, LanmaoBMS fortnightly. The most recent releases landed on August 15, 2026 and July 6, 2026 respectively.

## The numbers

| Metric | PVbutler | LanmaoBMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (15 ratings)](https://appshunter.io/ios/app/pvbutler/id1418322399/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lanmaobms/id6448680409/reviews)** |
| Number of ratings | **15** | 1 |
| Positive reviews | 17.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 214 MB | 13 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Growatt New Energy Technology Co.,Ltd](https://appshunter.io/developer/1135731820) | [Nanchang Yepai Technology Co., Ltd.](https://appshunter.io/developer/1503296093) |

## What reviewers say

### PVbutler

[App page](https://appshunter.io/ios/app/pvbutler/id1418322399)

Monitor your photovoltaic plant's performance remotely. Access energy yield, income, and system status wirelessly. Requires registration with the Sacolar PV Data Center.

**Highlights:** Remote monitoring of photovoltaic plants, Access energy yield data, Track income generation, View system status, Wireless data access, Compatible with Sacolar PV Data Center

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### LanmaoBMS

[App page](https://appshunter.io/ios/app/lanmaobms/id6448680409)

This app monitors and manages lithium battery systems via Bluetooth. It provides real-time data on voltage, temperature, and capacity, offering alerts for potential issues and extending battery life. Supports various lithium battery pack configurations.

**Highlights:** Real-time voltage display, Single battery status and alarms, Intuitive remaining capacity display, Cell temperature and critical alerts, Power and cycle count recording, Supports multi-cell lithium battery packs

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PVbutler free?

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

### Is LanmaoBMS free?

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

### Which has better reviews, PVbutler or LanmaoBMS?

LanmaoBMS is rated higher. PVbutler averages 2.9 out of 5 from 15 ratings, while LanmaoBMS averages 5.0 from 1 ratings.

### Do PVbutler or LanmaoBMS have ads?

Neither PVbutler nor LanmaoBMS shows ads.

### Which is updated more often, PVbutler or LanmaoBMS?

PVbutler ships an update every 3 months, and LanmaoBMS fortnightly. Most recently, PVbutler was updated on August 15, 2026 and LanmaoBMS on July 6, 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.*