# Weather Worlds vs Undercast Weather Aether

The clearest difference is price: Weather Worlds at Free against Undercast Weather Aether's $9.99. Weather Worlds also leads on iOS requirement (16.4 vs 18.0). Undercast Weather Aether's advantage is in-app purchases (none vs 1) and chart position (#62 vs unranked). On update cadence and ads there is nothing between them.

Weather Worlds is free to download; Undercast Weather Aether costs $9.99 up front. Weather Worlds sells 1 in-app purchase, starting at $1.99 per month. Undercast Weather Aether asks for nothing beyond the download.

Weather Worlds ships an update every 2 weeks, Undercast Weather Aether weekly. The most recent releases landed on November 12, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Weather Worlds | Undercast Weather Aether |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/weather-worlds/id6754285701/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Subscription | — |
| Best chart rank | — | **#62** |
| Size | 80 MB | 13 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Kollective](https://appshunter.io/developer/1847661474) | [Nope Dragon LC](https://appshunter.io/developer/1870645889) |

## What reviewers say

### Weather Worlds

[App page](https://appshunter.io/ios/app/weather-worlds/id6754285701)

Experience weather forecasts like never before with beautifully illustrated cityscapes that change with real-time conditions. Get detailed hourly and weekly forecasts, live radar, and severe weather alerts, all within a visually engaging interface. A single subscription unlocks all premium features and new city themes added regularly.

**Highlights:** Illustrated city themes that change with weather, Real-time conditions and hourly/weekly forecasts, Live interactive precipitation radar, Severe weather, temperature, and air quality alerts, Advanced weather insights (dew point, pressure, etc.), Pollen and air quality breakdowns, New cities and worlds added regularly

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weather Worlds Premium | $1.99 | per month |


### Undercast Weather Aether

[App page](https://appshunter.io/ios/app/undercast-weather-aether/id6760869971)

**Currently charting:** #62 Top Paid · Weather (US App Store)

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

**In-app purchases:** none


## Frequently asked questions

### Is Weather Worlds free?

Weather Worlds is free to download, with in-app purchases available.

### Is Undercast Weather Aether free?

Undercast Weather Aether costs $9.99, with no in-app purchases.

### Do Weather Worlds or Undercast Weather Aether have ads?

Neither Weather Worlds nor Undercast Weather Aether shows ads.

### Which is updated more often, Weather Worlds or Undercast Weather Aether?

Weather Worlds ships an update every 2 weeks, and Undercast Weather Aether weekly. Most recently, Weather Worlds was updated on November 12, 2026 and Undercast Weather Aether on November 9, 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.*