# xSky vs T

The clearest difference is update cadence: xSky at every 3 months against T's every 35 months. T's advantage is iOS requirement (12.0.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

xSky ships an update every 3 months, T every 35 months. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | xSky | T |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (80 ratings)](https://appshunter.io/ios/app/xsky/id850941042/reviews)** | — |
| Number of ratings | **80** | — |
| Positive reviews | 79.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 35 months |
| Monetization | Free | — |
| Size | 60 MB | 77 MB |
| Requires iOS | 16.0 | **12.0.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oleg Sur](https://appshunter.io/developer/1454732575) | [GREENEXT TECHNOLOGIES SPA](https://appshunter.io/developer/1618242301) |

## What reviewers say

### xSky

[App page](https://appshunter.io/ios/app/xsky/id850941042)

Explore the cosmos with a virtual telescope. Point your device at the sky to identify celestial bodies. Zoom in for detailed views and use a search function to locate specific objects.

**Highlights:** Virtual telescope functionality, Identify Sun, Moon, Planets, Stars, Galaxies, Zoom up to a million times, Screen lock to stop motion, Object search arrow, Soft music and sound effects

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🔭 Realistic space simulation
- ✨ Beautiful visuals and music
- 👍 Easy to use interface
- 💡 Great for learning astronomy
- 💯 Highly accurate object identification

**What reviewers complain about**

- 🐛 App crashing issues
- 🧭 Location services not working
- 🔄 Inconsistent with reality (out of sync)
- 📱 Not optimized for all devices (e.g., iPhone 12)
- 🎛️ Hard to control

**Reported bugs**

- App keeps crashing
- Location services not working/picking a country
- App closes immediately upon opening
- App is glitchy and moves by itself
- Search button not working in horizontal position

**Requested features**

- Camera feature for high-quality photos
- Ability to turn down exposure for photos
- Facts read aloud about celestial objects
- Traditional constellation names (e.g., Virgo, Taurus)
- Show International Space Station or other satellites


### T

[App page](https://appshunter.io/ios/app/t-green/id1552198318)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is xSky free?

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

### Is T free?

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

### Do xSky or T have ads?

Neither xSky nor T shows ads.

### Which is updated more often, xSky or T?

xSky ships an update every 3 months, and T every 35 months. Most recently, xSky was updated on November 1, 2026 and T on November 7, 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.*