# Aerzeit vs SunNow

The clearest difference is in-app purchases: SunNow at none against Aerzeit's 1. SunNow also leads on iOS requirement (14.0 vs 16.4). On price, ads and device support there is nothing between them.

Both are free to download. Aerzeit sells 1 in-app purchase, starting at $9.99 per year. SunNow asks for nothing beyond the download.

## The numbers

| Metric | Aerzeit | SunNow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/aerzeit-when-to-open-windows/id6787749300/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Monetization | Freemium | — |
| Size | 27 MB | 96 MB |
| Requires iOS | 16.4 | **14.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Samuel Harrold](https://appshunter.io/developer/6775297361) | [nonono LLC](https://appshunter.io/developer/1888130816) |

## What reviewers say

### Aerzeit

[App page](https://appshunter.io/ios/app/aerzeit-when-to-open-windows/id6787749300)

This app analyzes local weather forecasts to suggest optimal times for opening windows to ventilate your home with fresh air. It allows customization of preferred temperature ranges and filters for rain, humidity, wind, air quality, and pollen.

**Highlights:** Optimal window opening times, Customizable temperature ranges, Rain, humidity, wind filters, Air quality and pollen alerts, 48-hour forecast chart, Apple Watch companion app

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aerzeit Premium | $9.99 | per year |


### SunNow

[App page](https://appshunter.io/ios/app/sunnow-interactive-sun-clock/id6788339839)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Aerzeit free?

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

### Is SunNow free?

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

### Do Aerzeit or SunNow have ads?

Neither Aerzeit nor SunNow shows ads.

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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.*