SolarLife BT vs Fourth Space
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SolarLife BT
Configure and monitor solar charging devices with Bluetooth connectivity. Access real-time data, view historical records up to 60 days, and explore features through a demo mode. Compatible with select Apple devices.
- Bluetooth configuration
- Real-time data access
- 60-day history records
- Demo mode
- Device settings management
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With Solar Life, you can configure products with built-in bluetooth support or by a VE.Direct Bluetooth LE dongle. CONFIGURE SETTINGS: It is so easy to configure your device! With just a few taps on your phone screen, edited settings and changes will be saved at your device. INSTANT DATA: You can get up-to-the-minute data from your solar charger or battery monitor. READ HISTORY RECORDS: You can read history records up to sixty days through Blue Solar MPPT chargers. DEMO MODE: Select a product from the built-in demo library and discover more features! This app requires Bluetooth Low Energy, which is supported on the iPhone 4S and up, iPad Air and iPad Mini (3rd and 4th generation). Products supported: *MT series * W series * SMR series * DC series
Fourth Space
Control your air conditioner remotely with this app. Adjust temperature, fan speed, mode, and power settings for a convenient smart home experience.
- Remote air conditioner control
- Turn on/off AC
- Adjust temperature
- Set fan speed
- Change operating mode
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Use the Fourth Space APP to provide you with a convenient smart control experience. Through the APP, you can directly remotely control the air conditioner to turn on or off, and adjust the air conditioner's functions, wind speed, mode, temperature and other settings
Screenshots
Verdict
The clearest difference is rating: SolarLife BT at 2.7 against Fourth Space's 1.0. SolarLife BT also leads on review sentiment (40% vs 0%) and ratings volume (15 vs 3). Fourth Space's advantage is update cadence (fortnightly vs monthly). 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.
SolarLife BT holds the better App Store score, 2.7 against 1.0. That said, the two scores are not equally well evidenced: SolarLife BT has 15 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 40% of SolarLife BT's written reviews are positive against 0% of Fourth Space's.
SolarLife BT ships an update monthly, Fourth Space fortnightly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.
| Parameter | SolarLife BT | Fourth Space |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (15 ratings) — better | 1.0 (3 ratings) |
| Positive reviews | 40.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 15 — better | 3 |
| Update frequency | Monthly | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 8 MB | 12 MB |
| Age rating | 17+ | 9+ |
| Developer | 江西达伙网络科技有限公司 | 第肆空间(深圳)创新科技有限公司 |
Customer experience
SolarLife BT
Fourth Space
In-app purchases
SolarLife BT
No in-app purchases
Fourth Space
No in-app purchases
