# UltimatronFrance vs Overkill Solar

The clearest difference is review sentiment: Overkill Solar at 100% against UltimatronFrance's 19%. UltimatronFrance's advantage is update cadence (every 3 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.

UltimatronFrance ships an update every 3 weeks, Overkill Solar every 4 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | UltimatronFrance | Overkill Solar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (21 ratings)](https://appshunter.io/ios/app/overkill-solar/id6444233824/reviews)** |
| Number of ratings | — | **21** |
| Positive reviews | 18.8% 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 | 71 MB | 21 MB |
| Requires iOS | **12.0** | 13.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [ULTIMATRON FRANCE](https://appshunter.io/developer/1544036037) | [Overkill Solar LLC](https://appshunter.io/developer/1653276724) |

## What reviewers say

### UltimatronFrance

[App page](https://appshunter.io/ios/app/ultimatronfrance/id1546832412)

Monitor your battery's health in real-time, tracking temperature, current, and voltage. Receive alarms for equalization and fault reminders from the protection system. Access historical battery parameter data.

**Highlights:** Real-time battery temperature monitoring, Real-time current and voltage monitoring, Battery equalization alarms, Protection system fault reminders, Historical battery parameter retrieval

**Features:** macOS Compatibility

**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 UltimatronFrance free?

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

### Is Overkill Solar free?

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

### Do UltimatronFrance or Overkill Solar have ads?

Neither UltimatronFrance nor Overkill Solar shows ads.

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

UltimatronFrance ships an update every 3 weeks, and Overkill Solar every 4 months. Most recently, UltimatronFrance was updated on October 24, 2026 and Overkill Solar on October 24, 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.*