# Overkill Solar vs GreenOE

The clearest difference is rating: Overkill Solar at 4.7 against GreenOE's 1.0. Overkill Solar also leads on 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 1.0. 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.

Overkill Solar ships an update every 4 months, GreenOE every 7 months. The most recent releases landed on October 14, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Overkill Solar | GreenOE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (16 ratings)](https://appshunter.io/ios/app/overkill-solar/id6444233824/reviews)** | [1.0 (3 ratings)](https://appshunter.io/ios/app/greenoe/id6745133836/reviews) |
| Number of ratings | **16** | 3 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 21 MB | 26 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 Boiling Water Technology Co., Ltd.](https://appshunter.io/developer/1688664790) |

## 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


### GreenOE

[App page](https://appshunter.io/ios/app/greenoe/id6745133836)

This utility app offers smart battery solutions to optimize device power usage. It aims to enhance the longevity and efficiency of your device's battery. The application is designed for users seeking better power management.

**Highlights:** Smart battery optimization, Enhanced power efficiency, Device battery longevity, User-friendly interface

**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 GreenOE free?

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

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

Overkill Solar is rated higher. Overkill Solar averages 4.7 out of 5 from 16 ratings, while GreenOE averages 1.0 from 3 ratings.

### Do Overkill Solar or GreenOE have ads?

Neither Overkill Solar nor GreenOE shows ads.

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

Overkill Solar ships an update every 4 months, and GreenOE every 7 months. Most recently, Overkill Solar was updated on October 14, 2026 and GreenOE on September 20, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*