Overkill Solar vs Sunster
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Sunster
Control your RV's parking air conditioning and heater remotely from your mobile device. Manage multiple devices with customizable scenes and receive real-time safety notifications for peace of mind.
- Remote climate control
- Multi-device compatibility
- Customizable scene control
- Real-time safety notifications
- Encrypted data transmission
- Dual-factor authentication
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Remote Smart Control No matter where you are, simply open the mobile app to remotely turn on/off and adjust the parking air conditioning temperature, control the heater operating mode, and say goodbye to extreme cold and heat by creating a comfortable environment in your RV. Multi-Device Compatibility Management Supports one-click connection with multiple devices, centralized management of heater devices, and customizable scene-based control schemes to simplify complex operations. Unworrying Safety Protection Real-time push notifications for device anomalies (such as overheating or power loss), supports remote forced shutdown; encrypted data transmission + dual-factor authentication, safeguarding your privacy and device security.
Screenshots
Verdict
The clearest difference is review sentiment: Overkill Solar at 100% against Sunster's 50%. Overkill Solar also leads on rating (4.7 vs 3.7) and ratings volume (16 vs 3). Sunster's advantage is update cadence (every 2 weeks vs every 4 months). On price, ads, in-app purchases and monetization model 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 3.7. That said, the two scores are not equally well evidenced: Overkill Solar has 16 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of Overkill Solar's written reviews are positive against 50% of Sunster's.
Overkill Solar ships an update every 4 months, Sunster every 2 weeks. The most recent releases landed on September 28, 2026 and October 7, 2026 respectively.
| Parameter | Overkill Solar | Sunster |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (16 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 100.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 16 — better | 3 |
| Update frequency | Every 4 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.4 | 13.0 — better |
| Further details — not scored | ||
| Size | 21 MB | 58 MB |
| Age rating | 4+ | 17+ |
| Developer | Overkill Solar LLC | 江苏百易德电子科技有限公司 |
Customer experience
Overkill Solar
Sunster
In-app purchases
Overkill Solar
No in-app purchases
Sunster
No in-app purchases
