# GR EMS vs MultiBMS

The clearest difference is price: GR EMS at Free against MultiBMS's $0.99. GR EMS also leads on in-app purchases (none vs 11). MultiBMS's advantage is update cadence (every 4 days vs every 3 weeks) and chart position (#190 vs unranked). On ads, device support and iOS requirement there is nothing between them.

GR EMS is free to download; MultiBMS costs $0.99 up front. MultiBMS sells 11 one-off in-app purchases. GR EMS asks for nothing beyond the download.

GR EMS ships an update every 3 weeks, MultiBMS every 4 days. The most recent releases landed on September 10, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | GR EMS | MultiBMS |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[4.0 (4 ratings)](https://appshunter.io/ios/app/multibms/id6771097913/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | — | Paid |
| Best chart rank | — | **#190** |
| Size | 54 MB | 36 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | +4 |
| Developer | [Shenzhen Gooree Energy Storage Technology Co., Ltd](https://appshunter.io/developer/1692131968) | [stefan peters](https://appshunter.io/developer/1874328616) |

## What reviewers say

### GR EMS

[App page](https://appshunter.io/ios/app/gr-ems/id6752559020)

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

**In-app purchases:** none


### MultiBMS

[App page](https://appshunter.io/ios/app/multibms/id6771097913)

**Currently charting:** #190 Top Paid · Utilities (US App Store)

Monitor multiple Bluetooth-enabled battery management systems from your iPhone. View detailed pack voltage, cell voltages, current, power, state of charge, and temperature. Build custom battery groups and visualize charging activity.

**Highlights:** Connect to multiple BMS devices, Detailed pack and cell diagnostics, Build custom parallel/series battery groups, Visualize charging and discharging, Apple Watch companion preview, Supports JiKong and JBD/Xiaoxiang hardware

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| E-Bike Rally | $0.99 | one-time |
| Bus Life | $0.99 | one-time |
| Off Grid | $0.99 | one-time |
| Minimal White | $0.99 | one-time |
| Retro Terminal | $0.99 | one-time |
| Marine | $0.99 | one-time |
| Arctic Ice | $0.99 | one-time |
| Matrix Code | $0.99 | one-time |
| Emergency | $0.99 | one-time |
| CAT Equipment | $0.99 | one-time |
| Aviation | $0.99 | one-time |


## Frequently asked questions

### Is GR EMS free?

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

### Is MultiBMS free?

MultiBMS costs $0.99, and also offers in-app purchases.

### Do GR EMS or MultiBMS have ads?

Neither GR EMS nor MultiBMS shows ads.

### Which is updated more often, GR EMS or MultiBMS?

GR EMS ships an update every 3 weeks, and MultiBMS every 4 days. Most recently, GR EMS was updated on September 10, 2026 and MultiBMS on September 22, 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.*