# Overkill Solar vs EnerKey

The clearest difference is rating: Overkill Solar at 4.7 against EnerKey's 3.0. Overkill Solar also leads on review sentiment (100% vs 75%) and ratings volume (16 vs 3). On price, update cadence, ads and in-app purchases 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 3.0. That said, the two scores are not equally well evidenced: Overkill Solar has 16 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of Overkill Solar's written reviews are positive against 75% of EnerKey's.

Overkill Solar ships an update every 4 months, EnerKey every 2 months. The most recent releases landed on August 18, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Overkill Solar | EnerKey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (16 ratings)](https://appshunter.io/ios/app/overkill-solar/id6444233824/reviews)** | [3.0 (3 ratings)](https://appshunter.io/ios/app/enerkey/id6447932138/reviews) |
| Number of ratings | **16** | 3 |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 21 MB | 31 MB |
| Requires iOS | 13.4 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Overkill Solar LLC](https://appshunter.io/developer/1653276724) | [Shenzhen Jinwei Power Source Technology Co., Ltd](https://appshunter.io/developer/1683049152) |

## 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


### EnerKey

[App page](https://appshunter.io/ios/app/enerkey/id6447932138)

Monitor and control your lithium battery system in real-time. View current status, historical data, and adjust protective parameters to ensure safe operation. Receive instant alerts for any abnormal conditions.

**Highlights:** Real-time battery monitoring, Historical data inquiry, Parameter setting, Alarm notifications, Voltage, current, and temperature display

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Overkill Solar free?

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

### Is EnerKey free?

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

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

Overkill Solar is rated higher. Overkill Solar averages 4.7 out of 5 from 16 ratings, while EnerKey averages 3.0 from 3 ratings.

### Do Overkill Solar or EnerKey have ads?

Neither Overkill Solar nor EnerKey shows ads.

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

Overkill Solar ships an update every 4 months, and EnerKey every 2 months. Most recently, Overkill Solar was updated on August 18, 2026 and EnerKey on June 1, 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.*