VATRER vs Overkill Solar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VATRER
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.
- Bluetooth battery connection
- Temperature monitoring
- Power, voltage, and current display
- Production date tracking
- Charge and discharge cycle count
- Full charge and usable time estimates
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Connect the battery of vatrer through Bluetooth, and display the temperature, power, voltage, current, production date and charge and discharge times of the battery. And displays the full time and the usable time at the time of charging and discharging.
Overkill Solar
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.
- 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
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Overkill Solar iOS App allows users to connect with the Overkill Solar Battery Management System (BMS). It can monitor voltage of the cells, total capacity, charging and discharging current, and switch the charging and discharging ports on or off. Features: - change bluetooth advertising name - unlock hardware protected BMS - save or load BMS configurations - calibrate cells voltage and charging or discharging current - log maximum or minimum voltage, current and power - enable and configure the balancer - modify the capacity settings - monitor temperature - monitor BMS alarms - import and export .fig files - set level 2 and 3 advanced protection values
Screenshots
Verdict
The clearest difference is review sentiment: Overkill Solar at 100% against VATRER's 29%. Overkill Solar also leads on rating (4.7 vs 2.6). 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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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, 4.7 against 2.6. Both are backed by a comparable volume of ratings — 19 and 16 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. The most recent releases landed on September 9, 2026 and August 18, 2026 respectively.
| Parameter | VATRER | Overkill Solar |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (19 ratings) | 4.7 (16 ratings) — better |
| Positive reviews | 29.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 19 — better | 16 |
| Update frequency | Every 3 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 13.4 |
| Further details — not scored | ||
| Size | 32 MB | 21 MB |
| Age rating | 17+ | 4+ |
| Developer | 桂玲 秦 | Overkill Solar LLC |
Customer experience
VATRER
Overkill Solar
In-app purchases
VATRER
No in-app purchases
Overkill Solar
No in-app purchases
