# Moon Lunation vs Weather Engine

The clearest difference is in-app purchases: Weather Engine at none against Moon Lunation's 1. Weather Engine also leads on update cadence (daily vs every 3 weeks) and iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Moon Lunation sells 1 one-off in-app purchase. Weather Engine asks for nothing beyond the download.

Moon Lunation ships an update every 3 weeks, Weather Engine daily. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Moon Lunation | Weather Engine |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 5.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Paid | — |
| Size | 28 MB | 64 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TraLand.com](https://appshunter.io/developer/311933406) | [Heebok Lee](https://appshunter.io/developer/1855773499) |

## What reviewers say

### Moon Lunation

[App page](https://appshunter.io/ios/app/moon-lunation/id312811399)

This app provides detailed lunar phase information for any date between 2000 and 2050. It calculates phases offline using precise astronomical geometry, displaying illuminated percentages and event times. Users can explore monthly calendars, visualize entire lunations, and view a 3D model of the Moon's surface.

**Highlights:** Offline moon phase computation, Date range 2000-2050, Illuminated percentage display, Lunar age and event times, Monthly calendar view, Lunation cycle visualization, 3D Moon surface model

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Moon Lunation Pro | $1.99 | one-time |


### Weather Engine

[App page](https://appshunter.io/ios/app/weather-engine/id6788181920)

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

**In-app purchases:** none


## Frequently asked questions

### Is Moon Lunation free?

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

### Is Weather Engine free?

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

### Do Moon Lunation or Weather Engine have ads?

Neither Moon Lunation nor Weather Engine shows ads.

### Which is updated more often, Moon Lunation or Weather Engine?

Moon Lunation ships an update every 3 weeks, and Weather Engine daily. Most recently, Moon Lunation was updated on October 17, 2026 and Weather Engine on October 15, 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.*