# Dawn Alarm vs Group03カレンダー

The clearest difference is in-app purchases: Group03カレンダー at none against Dawn Alarm's 1. Group03カレンダー also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Dawn Alarm sells 1 one-off in-app purchase. Group03カレンダー asks for nothing beyond the download.

Dawn Alarm ships an update every 4 months, Group03カレンダー every 2 months. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Dawn Alarm | Group03カレンダー |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (26 ratings)](https://appshunter.io/ios/app/dawn-alarm/id963699059/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | 65.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 52 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takafumi AMANO](https://appshunter.io/developer/581065340) | [katsutoshi Kono](https://appshunter.io/developer/1582632451) |

## What reviewers say

### Dawn Alarm

[App page](https://appshunter.io/ios/app/dawn-alarm/id963699059)

Wake up with the natural rhythm of daylight. This alarm app notifies you of dawn, sunrise, sunset, and dusk times for your location. It's ideal for those who want to align activities with natural light cycles.

**Highlights:** Dawn, sunrise, sunset, dusk notifications, Location-based timing, Major city timing lookup, Offline access to timing, Customizable dawn/dusk definitions

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Group03カレンダー

[App page](https://appshunter.io/ios/app/group03/id1582632449)

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

**In-app purchases:** none


## Frequently asked questions

### Is Dawn Alarm free?

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

### Is Group03カレンダー free?

Group03カレンダー is free to download, with no in-app purchases.

### Do Dawn Alarm or Group03カレンダー have ads?

Dawn Alarm shows ads; Group03カレンダー does not.

### Which is updated more often, Dawn Alarm or Group03カレンダー?

Dawn Alarm ships an update every 4 months, and Group03カレンダー every 2 months. Most recently, Dawn Alarm was updated on October 13, 2026 and Group03カレンダー on October 6, 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.*