FE vs Overkill Solar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FE
Monitor your battery's charging status, remaining time, and historical data with this Bluetooth-connected device. It provides a comprehensive overview of your battery's performance.
- 500 amp battery monitoring
- Bluetooth connectivity
- Real-time charging status
- Remaining time estimation
- Historical battery data
Read full descriptionHide full description
FE-Shunt is a versatile and easy-to-use 500 amp battery monitor.Connect to the FE-Shunt device via Bluetooth, you can read out all monitored battery parameters-such as charging status, remaining time, historical information, etc.
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
Read full descriptionHide full description
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 FE's 50%. Overkill Solar also leads on rating (4.7 vs 3.3) and iOS requirement (13.4 vs 15.6). FE'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 3.3. Both are backed by a comparable volume of ratings — 8 and 16 respectively. Written reviews point the same way: 50% of FE's written reviews are positive against 100% of Overkill Solar's.
FE ships an update every 3 weeks, Overkill Solar every 4 months. The most recent releases landed on October 6, 2026 and September 28, 2026 respectively.
| Parameter | FE | Overkill Solar |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (8 ratings) | 4.7 (16 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 8 | 16 — better |
| 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 | 15.6 | 13.4 — better |
| Further details — not scored | ||
| Size | 18 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Hangzhou Dashi Wisdom Technology Co., Ltd. | Overkill Solar LLC |
Customer experience
FE
Overkill Solar
In-app purchases
FE
No in-app purchases
Overkill Solar
No in-app purchases
