Solar Guardian vs Sunster
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solar Guardian
Monitor and configure various solar energy systems, including inverters and storage solutions. This utility app provides essential data display and parameter adjustments for efficient energy management.
- Data display for solar systems
- Parameter setting for inverters
- Supports grid-tie and hybrid inverters
- Manages energy storage systems
- Configures N+1 hybrid systems
- Monitors home and mobile energy storage
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Solar Guardian is a new application with the core function of data display and parameter setting for inverters, solar chargers, grid-tie inverters, hybrid inverters, energy storage systems, N+1 hybrid systems, home energy storage and mobile energy storage.
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 rating: Sunster at 3.0 against Solar Guardian's 2.3. Sunster also leads on review sentiment (50% vs 17%) and update cadence (every 2 weeks vs every 2 months). Solar Guardian's advantage is ratings volume (17 vs 4). 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.
Sunster holds the better App Store score, 3.0 against 2.3. Both are backed by a comparable volume of ratings — 17 and 4 respectively. Written reviews point the same way: 17% of Solar Guardian's written reviews are positive against 50% of Sunster's.
Solar Guardian ships an update every 2 months, Sunster every 2 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | Solar Guardian | Sunster |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (17 ratings) | 3.0 (4 ratings) — better |
| Positive reviews | 16.7% of reviews | 50.0% of reviews — better |
| Number of ratings | 17 — better | 4 |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 85 MB | 58 MB |
| Age rating | 4+ | 17+ |
| Developer | BEIJING EPSOLAR TECHNOLOGY CO., LTD. | 江苏百易德电子科技有限公司 |
Customer experience
Solar Guardian
Sunster
In-app purchases
Solar Guardian
No in-app purchases
Sunster
No in-app purchases
