# TerraSky vs SunSpan

The clearest difference is iOS requirement: SunSpan at 16.0 against TerraSky's 18.0. 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.

## The numbers

| Metric | TerraSky | SunSpan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sunspan/id6761731642/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Monetization | — | Free |
| Size | 2 MB | 6 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [ADRIAN DANIEL CIOC](https://appshunter.io/developer/1818602503) | [Mykhailo Chelnokov](https://appshunter.io/developer/1891136089) |

## What reviewers say

### TerraSky

[App page](https://appshunter.io/ios/app/terrasky/id6747069044)

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

**In-app purchases:** none


### SunSpan

[App page](https://appshunter.io/ios/app/sunspan/id6761731642)

Visualize an entire year of daylight, sunrise, sunset, and twilight on a single, intuitive chart. Easily inspect daily solar times and phases by tapping or dragging across the visual representation. Offers detailed insights into seasonal changes and astronomical events.

**Highlights:** Full-year daylight chart, Eight-stop twilight gradient, Inspect daily solar times, DST transitions marked, Location picker via map/GPS, Automatic time zone resolution

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

**In-app purchases:** none


## Frequently asked questions

### Is TerraSky free?

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

### Is SunSpan free?

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

### Do TerraSky or SunSpan have ads?

Neither TerraSky nor SunSpan shows ads.

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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.*