# Overkill Solar vs ProMasters Only

The clearest difference is price: Overkill Solar at Free against ProMasters Only's $69.99. Overkill Solar also leads on review sentiment (100% vs 79%) and iOS requirement (13.4 vs 15.6). ProMasters Only's advantage is chart position (#166 vs unranked). On rating, ratings volume, update cadence and ads there is nothing between them.

Overkill Solar is free to download; ProMasters Only costs $69.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Overkill Solar holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 16 and 21 respectively. Written reviews point the same way: 100% of Overkill Solar's written reviews are positive against 79% of ProMasters Only's.

Overkill Solar ships an update every 4 months, ProMasters Only every 7 months. The most recent releases landed on September 28, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Overkill Solar | ProMasters Only |
| --- | --- | --- |
| Price | **Free** | $69.99 |
| Rating | **[4.7 (16 ratings)](https://appshunter.io/ios/app/overkill-solar/id6444233824/reviews)** | [4.5 (21 ratings)](https://appshunter.io/ios/app/promasters-only/id6737483353/reviews) |
| Number of ratings | 16 | **21** |
| Positive reviews | **100.0% of reviews** | 78.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 7 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#166** |
| Size | 21 MB | 27 MB |
| Requires iOS | **13.4** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Overkill Solar LLC](https://appshunter.io/developer/1653276724) | [Kip Amore](https://appshunter.io/developer/1776662732) |

## 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


### ProMasters Only

[App page](https://appshunter.io/ios/app/promasters-only/id6737483353)

**Currently charting:** #166 Top Paid · Utilities (US App Store)

This app provides diagnostic tools and information specifically for Ram ProMaster vans. It offers real-time gauge monitoring, trouble code explanations, and a repair log, requiring a separate OBD dongle purchase.

**Highlights:** Trouble code reader with explanations, Real-time gauge monitoring (Voltage, Oil Pressure, Coolant Temp, etc.), Transmission fluid temperature gauge, Oil change and repair log book, Repair shop finder, Technical library with videos, Fluids and consumables specifications

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Overkill Solar free?

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

### Is ProMasters Only free?

ProMasters Only costs $69.99, with no in-app purchases.

### Which has better reviews, Overkill Solar or ProMasters Only?

Overkill Solar is rated higher. Overkill Solar averages 4.7 out of 5 from 16 ratings, while ProMasters Only averages 4.5 from 21 ratings.

### Do Overkill Solar or ProMasters Only have ads?

Neither Overkill Solar nor ProMasters Only shows ads.

### Which is updated more often, Overkill Solar or ProMasters Only?

Overkill Solar ships an update every 4 months, and ProMasters Only every 7 months. Most recently, Overkill Solar was updated on September 28, 2026 and ProMasters Only on October 13, 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.*