# Overkill Solar vs HeatGenie

The clearest difference is review sentiment: Overkill Solar at 100% against HeatGenie's 18%. Overkill Solar also leads on rating (4.8 vs 2.3) and update cadence (every 4 months vs every 10 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, 4.8 against 2.3. That said, the two scores are not equally well evidenced: Overkill Solar has 21 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 18% of HeatGenie's.

Overkill Solar ships an update every 4 months, HeatGenie every 10 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Overkill Solar | HeatGenie |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (21 ratings)](https://appshunter.io/ios/app/overkill-solar/id6444233824/reviews)** | [2.3 (3 ratings)](https://appshunter.io/ios/app/heatgenie/id6471930955/reviews) |
| Number of ratings | **21** | 3 |
| Positive reviews | **100.0% of reviews** | 18.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 10 months |
| Monetization | Free | Free |
| Size | 21 MB | 38 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) | [Wenzhou Bogu Intelligent Technology Co.](https://appshunter.io/developer/1716281908) |

## 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


### HeatGenie

[App page](https://appshunter.io/ios/app/heatgenie/id6471930955)

Control your parking diesel heater remotely via Bluetooth. Adjust temperature, switch gears, and turn the unit on or off directly from your mobile device.

**Highlights:** Bluetooth connectivity, Remote temperature adjustment, On/Off power control, Gear switching, Smart hardware integration

**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 HeatGenie free?

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

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

Overkill Solar is rated higher. Overkill Solar averages 4.8 out of 5 from 21 ratings, while HeatGenie averages 2.3 from 3 ratings.

### Do Overkill Solar or HeatGenie have ads?

Neither Overkill Solar nor HeatGenie shows ads.

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

Overkill Solar ships an update every 4 months, and HeatGenie every 10 months. Most recently, Overkill Solar was updated on November 3, 2026 and HeatGenie on November 4, 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.*