# Moon Phase vs SkyEngine

The clearest difference is in-app purchases: SkyEngine at none against Moon Phase's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Moon Phase sells 1 in-app purchase, starting at $6.99 per 7 days. SkyEngine asks for nothing beyond the download.

Moon Phase ships an update weekly, SkyEngine every 8 days. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Moon Phase | SkyEngine |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 8 days |
| Size | 20 MB | 23 MB |
| Requires iOS | 18.6 | **17.6** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Marc-Philipp Neusser](https://appshunter.io/developer/1812629889) | [ZIRUI LYU](https://appshunter.io/developer/1896284758) |

## What reviewers say

### Moon Phase

[App page](https://appshunter.io/ios/app/moon-phase-tracker-and-calendar/id6758560320)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Unlimited Access | $6.99 | per 7 days |


### SkyEngine

[App page](https://appshunter.io/ios/app/skyengine/id6766723696)

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

**In-app purchases:** none


## Frequently asked questions

### Is Moon Phase free?

Moon Phase is free to download, with in-app purchases available.

### Is SkyEngine free?

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

### Do Moon Phase or SkyEngine have ads?

Neither Moon Phase nor SkyEngine shows ads.

### Which is updated more often, Moon Phase or SkyEngine?

Moon Phase ships an update weekly, and SkyEngine every 8 days. Most recently, Moon Phase was updated on October 4, 2026 and SkyEngine on October 9, 2026.

---

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