# Undercast Weather Aether vs Comparecast

The clearest difference is price: Comparecast at Free against Undercast Weather Aether's $9.99. Undercast Weather Aether's advantage is device support (4 vs 2). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

Comparecast is free to download; Undercast Weather Aether costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Undercast Weather Aether ships an update weekly, Comparecast every 2 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Undercast Weather Aether | Comparecast |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/comparecast-weather-models/id6771171777/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | — | Free |
| Size | 13 MB | 5 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nope Dragon LC](https://appshunter.io/developer/1870645889) | [William Kirkpatrick](https://appshunter.io/developer/1608944971) |

## What reviewers say

### Undercast Weather Aether

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

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

**In-app purchases:** none


### Comparecast

[App page](https://appshunter.io/ios/app/comparecast-weather-models/id6771171777)

This app displays forecasts from multiple independent weather models, allowing users to compare predictions and understand forecast uncertainty. It offers detailed hourly and 10-day forecasts, a live weather station map, and customizable units and locations.

**Highlights:** Seven independent forecast models side-by-side, Consensus card for model agreement, Interactive Compare chart, Hourly forecast details, 10-day forecasts with conditions, Live weather station map, Customizable units and locations

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

**In-app purchases:** none


## Frequently asked questions

### Is Undercast Weather Aether free?

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

### Is Comparecast free?

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

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

Neither Undercast Weather Aether nor Comparecast shows ads.

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

Undercast Weather Aether ships an update weekly, and Comparecast every 2 weeks. Most recently, Undercast Weather Aether was updated on November 5, 2026 and Comparecast on October 31, 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.*