# VATRER vs Overkill Solar

The clearest difference is review sentiment: Overkill Solar at 100% against VATRER's 29%. Overkill Solar also leads on rating (4.8 vs 2.5). VATRER's advantage is update cadence (every 3 weeks vs every 4 months). On price, ratings volume, ads and in-app purchases 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 2.5. Both are backed by a comparable volume of ratings — 22 and 21 respectively. Written reviews point the same way: 29% of VATRER's written reviews are positive against 100% of Overkill Solar's.

VATRER ships an update every 3 weeks, Overkill Solar every 4 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | VATRER | Overkill Solar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (22 ratings)](https://appshunter.io/ios/app/vatrer/id1641200046/reviews) | **[4.8 (21 ratings)](https://appshunter.io/ios/app/overkill-solar/id6444233824/reviews)** |
| Number of ratings | **22** | 21 |
| Positive reviews | 29.4% 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 | 32 MB | 21 MB |
| Requires iOS | **13.0** | 13.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [桂玲 秦](https://appshunter.io/developer/1739192081) | [Overkill Solar LLC](https://appshunter.io/developer/1653276724) |

## What reviewers say

### VATRER

[App page](https://appshunter.io/ios/app/vatrer/id1641200046)

Monitor your battery's vital statistics wirelessly. View temperature, power, voltage, current, production date, and charge/discharge cycles. Get estimates for full charge and usable time during charging and discharging.

**Highlights:** Bluetooth battery connection, Temperature monitoring, Power, voltage, and current display, Production date tracking, Charge and discharge cycle count, Full charge and usable time estimates

**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 VATRER free?

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

### Is Overkill Solar free?

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

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

Overkill Solar is rated higher. VATRER averages 2.5 out of 5 from 22 ratings, while Overkill Solar averages 4.8 from 21 ratings.

### Do VATRER or Overkill Solar have ads?

Neither VATRER nor Overkill Solar shows ads.

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

VATRER ships an update every 3 weeks, and Overkill Solar every 4 months. Most recently, VATRER was updated on November 3, 2026 and Overkill Solar on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*