# Overkill Solar vs Sunster

The clearest difference is review sentiment: Overkill Solar at 100% against Sunster's 50%. Overkill Solar also leads on rating (4.7 vs 3.7) and ratings volume (16 vs 3). Sunster's advantage is update cadence (every 2 weeks vs every 4 months). 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 3.7. 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 50% of Sunster's.

Overkill Solar ships an update every 4 months, Sunster every 2 weeks. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Overkill Solar | Sunster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (16 ratings)](https://appshunter.io/ios/app/overkill-solar/id6444233824/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/sunster/id6745934134/reviews) |
| Number of ratings | **16** | 3 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 21 MB | 58 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Overkill Solar LLC](https://appshunter.io/developer/1653276724) | [江苏百易德电子科技有限公司](https://appshunter.io/developer/1812800118) |

## 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


### Sunster

[App page](https://appshunter.io/ios/app/sunster/id6745934134)

Control your RV's parking air conditioning and heater remotely from your mobile device. Manage multiple devices with customizable scenes and receive real-time safety notifications for peace of mind.

**Highlights:** Remote climate control, Multi-device compatibility, Customizable scene control, Real-time safety notifications, Encrypted data transmission, Dual-factor authentication

**In-app purchases:** none


## Frequently asked questions

### Is Overkill Solar free?

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

### Is Sunster free?

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

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

Overkill Solar is rated higher. Overkill Solar averages 4.7 out of 5 from 16 ratings, while Sunster averages 3.7 from 3 ratings.

### Do Overkill Solar or Sunster have ads?

Neither Overkill Solar nor Sunster shows ads.

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

Overkill Solar ships an update every 4 months, and Sunster every 2 weeks. Most recently, Overkill Solar was updated on October 14, 2026 and Sunster on October 7, 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.*