# BAT vs Overkill Solar

The clearest difference is review sentiment: Overkill Solar at 100% against BAT's 24%. Overkill Solar also leads on rating (4.7 vs 3.2). BAT's advantage is update cadence (every 3 weeks vs every 4 months) and ratings volume (61 vs 16). 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.

Overkill Solar holds the better App Store score, 4.7 against 3.2. Both are backed by a comparable volume of ratings — 61 and 16 respectively. Written reviews point the same way: 24% of BAT's written reviews are positive against 100% of Overkill Solar's.

BAT ships an update every 3 weeks, Overkill Solar every 4 months. The most recent releases landed on September 9, 2026 and August 18, 2026 respectively.

## The numbers

| Metric | BAT | Overkill Solar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (61 ratings)](https://appshunter.io/ios/app/bat-bms/id1611741274/reviews) | **[4.7 (16 ratings)](https://appshunter.io/ios/app/overkill-solar/id6444233824/reviews)** |
| Number of ratings | **61** | 16 |
| Positive reviews | 24.1% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Free | Free |
| Size | 9 MB | 21 MB |
| Requires iOS | **12.0** | 13.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Grenergy Technology Co.,Ltd.](https://appshunter.io/developer/1602312075) | [Overkill Solar LLC](https://appshunter.io/developer/1653276724) |

## What reviewers say

### BAT

[App page](https://appshunter.io/ios/app/bat-bms/id1611741274)

Monitor your smart Bluetooth lithium batteries wirelessly from your phone. Track key metrics like state of charge, voltage, current, and temperature. Connect to multiple batteries simultaneously and view their data.

**Highlights:** Wireless Bluetooth connection, Track cycle life, Display SOC, voltage, current, Monitor cell voltage and temperature, Connect to multiple batteries

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is BAT free?

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

### Is Overkill Solar free?

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

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

Overkill Solar is rated higher. BAT averages 3.2 out of 5 from 61 ratings, while Overkill Solar averages 4.7 from 16 ratings.

### Do BAT or Overkill Solar have ads?

Neither BAT nor Overkill Solar shows ads.

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

BAT ships an update every 3 weeks, and Overkill Solar every 4 months. Most recently, BAT was updated on September 9, 2026 and Overkill Solar on August 18, 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.*