# Within vs Vesper Sky

The clearest difference is in-app purchases: Within at none against Vesper Sky's 3. Within also leads on update cadence (every 3 days vs monthly). Vesper Sky's advantage is device support (3 vs 1) and iOS requirement (16.4 vs 18.0). On price and ads there is nothing between them.

Both are free to download. Vesper Sky sells 3 in-app purchases, starting at $2.99 per month. Within asks for nothing beyond the download.

Within ships an update every 3 days, Vesper Sky monthly. The most recent releases landed on October 28, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Within | Vesper Sky |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Size | 5 MB | 126 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 9+ | 4+ |
| Developer | [Dingze Yu](https://appshunter.io/developer/1803875450) | [iSimplifyMe LLC](https://appshunter.io/developer/1887111241) |

## What reviewers say

### Within

[App page](https://appshunter.io/ios/app/within-horizons/id6757207646)

**Features:** macOS Compatibility

**In-app purchases:** none


### Vesper Sky

[App page](https://appshunter.io/ios/app/vesper-sky/id6762069223)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vesper | $2.99 | per month |
| Vesper Annual | $24.99 | per year |
| Vesper Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Within free?

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

### Is Vesper Sky free?

Vesper Sky is free to download, with in-app purchases available.

### Do Within or Vesper Sky have ads?

Neither Within nor Vesper Sky shows ads.

### Which is updated more often, Within or Vesper Sky?

Within ships an update every 3 days, and Vesper Sky monthly. Most recently, Within was updated on October 28, 2026 and Vesper Sky on October 19, 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.*