# ULTIMATRON vs Overkill Solar

The clearest difference is update cadence: ULTIMATRON at every 4 days against Overkill Solar's every 4 months. ULTIMATRON also leads on iOS requirement (8.0 vs 13.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ULTIMATRON ships an update every 4 days, Overkill Solar every 4 months. The most recent releases landed on October 6, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | ULTIMATRON | Overkill Solar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (16 ratings)](https://appshunter.io/ios/app/overkill-solar/id6444233824/reviews)** |
| Number of ratings | — | **16** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 4 months |
| Monetization | — | Free |
| Size | 8 MB | 21 MB |
| Requires iOS | **8.0** | 13.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ULTIMATRON FRANCE](https://appshunter.io/developer/1544036037) | [Overkill Solar LLC](https://appshunter.io/developer/1653276724) |

## What reviewers say

### ULTIMATRON

[App page](https://appshunter.io/ios/app/ultimatron/id1544036035)

**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 ULTIMATRON free?

ULTIMATRON 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 ULTIMATRON or Overkill Solar have ads?

Neither ULTIMATRON nor Overkill Solar shows ads.

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

ULTIMATRON ships an update every 4 days, and Overkill Solar every 4 months. Most recently, ULTIMATRON was updated on October 6, 2026 and Overkill Solar on September 28, 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.*