# SolarLife BT vs Fourth Space

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.

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.

## The numbers

| Metric | SolarLife BT | Fourth Space |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (15 ratings)](https://appshunter.io/ios/app/solarlife-bt/id1522399442/reviews)** | [1.0 (3 ratings)](https://appshunter.io/ios/app/fourth-space/id6670521483/reviews) |
| Number of ratings | **15** | 3 |
| Positive reviews | **40.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free | Free |
| Size | 8 MB | 12 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 9+ |
| Developer | [江西达伙网络科技有限公司](https://appshunter.io/developer/1234844673) | [第肆空间(深圳)创新科技有限公司](https://appshunter.io/developer/1766639077) |

## What reviewers say

### SolarLife BT

[App page](https://appshunter.io/ios/app/solarlife-bt/id1522399442)

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.

**Highlights:** Bluetooth configuration, Real-time data access, 60-day history records, Demo mode, Device settings management

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Fourth Space

[App page](https://appshunter.io/ios/app/fourth-space/id6670521483)

Control your air conditioner remotely with this app. Adjust temperature, fan speed, mode, and power settings for a convenient smart home experience.

**Highlights:** Remote air conditioner control, Turn on/off AC, Adjust temperature, Set fan speed, Change operating mode

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SolarLife BT free?

SolarLife BT is free to download, with no in-app purchases.

### Is Fourth Space free?

Fourth Space is free to download, with no in-app purchases.

### Which has better reviews, SolarLife BT or Fourth Space?

SolarLife BT is rated higher. SolarLife BT averages 2.7 out of 5 from 15 ratings, while Fourth Space averages 1.0 from 3 ratings.

### Do SolarLife BT or Fourth Space have ads?

Neither SolarLife BT nor Fourth Space shows ads.

### Which is updated more often, SolarLife BT or Fourth Space?

SolarLife BT ships an update monthly, and Fourth Space fortnightly. Most recently, SolarLife BT was updated on November 3, 2026 and Fourth Space on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*