# Forecast vs Undercast Weather Aether

The clearest difference is price: Forecast at Free against Undercast Weather Aether's $9.99. Undercast Weather Aether's advantage is in-app purchases (none vs 2) and update cadence (weekly vs every 3 months). On ads and iOS requirement there is nothing between them.

Forecast is free to download; Undercast Weather Aether costs $9.99 up front. Forecast sells 2 in-app purchases, starting at $0.49 per month. Undercast Weather Aether asks for nothing beyond the download.

Forecast ships an update every 3 months, Undercast Weather Aether weekly. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Forecast | Undercast Weather Aether |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 3 MB | 13 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Jason Koehn](https://appshunter.io/developer/1666093705) | [Nope Dragon LC](https://appshunter.io/developer/1870645889) |

## What reviewers say

### Forecast

[App page](https://appshunter.io/ios/app/forecast-nws/id6504900617)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.49 | per month |
| Yearly | $4.99 | per year |


### Undercast Weather Aether

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

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

**In-app purchases:** none


## Frequently asked questions

### Is Forecast free?

Forecast 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 Forecast or Undercast Weather Aether have ads?

Neither Forecast nor Undercast Weather Aether shows ads.

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

Forecast ships an update every 3 months, and Undercast Weather Aether weekly. Most recently, Forecast was updated on October 10, 2026 and Undercast Weather Aether on October 13, 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.*