# Overkill Solar vs MultiBMS

The clearest difference is price: Overkill Solar at Free against MultiBMS's $0.99. Overkill Solar also leads on rating (4.7 vs 4.0) and in-app purchases (none vs 11). MultiBMS's advantage is update cadence (every 4 days vs every 4 months). On review sentiment, ads and device support there is nothing between them.

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

Overkill Solar holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 16 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Overkill Solar ships an update every 4 months, MultiBMS every 4 days. The most recent releases landed on August 18, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Overkill Solar | MultiBMS |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.7 (16 ratings)](https://appshunter.io/ios/app/overkill-solar/id6444233824/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/multibms/id6771097913/reviews) |
| Number of ratings | **16** | 4 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | **Free** | Paid |
| Size | 21 MB | 36 MB |
| Requires iOS | **13.4** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | +4 |
| Developer | [Overkill Solar LLC](https://appshunter.io/developer/1653276724) | [stefan peters](https://appshunter.io/developer/1874328616) |

## What reviewers say

### Overkill Solar

[App page](https://appshunter.io/ios/app/overkill-solar/id6444233824)

This app connects to a solar battery management system to provide detailed monitoring and control. Users can track cell voltage, capacity, current, and manage charging/discharging ports. It also offers advanced configuration options for calibration, balancing, and protection settings.

**Highlights:** Monitor cell voltage and capacity, Control charging and discharging ports, Calibrate voltage and current, Configure balancer and protection values, Log voltage, current, and power, Monitor BMS alarms and temperature

**Features:** macOS Compatibility

**In-app purchases:** none


### MultiBMS

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

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 Overkill Solar free?

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

### Is MultiBMS free?

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

### Which has better reviews, Overkill Solar or MultiBMS?

Overkill Solar is rated higher. Overkill Solar averages 4.7 out of 5 from 16 ratings, while MultiBMS averages 4.0 from 4 ratings.

### Do Overkill Solar or MultiBMS have ads?

Neither Overkill Solar nor MultiBMS shows ads.

### Which is updated more often, Overkill Solar or MultiBMS?

Overkill Solar ships an update every 4 months, and MultiBMS every 4 days. Most recently, Overkill Solar was updated on August 18, 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.*