Dawn Alarm is a free iPhone app developed by Takafumi AMANO. It falls under the Lifestyle category and serves as an alarm that provides notifications at dawn, sunrise, sunset, and dusk. Whether you want to start your day shortly after sunrise or plan activities around the changing light, this app is a great choice.

One of the standout features of Dawn Alarm is its ability to determine the timing of sunrise, sunset, dawn, and dusk for your current location and major cities instantly. This means you can access this information even if you haven't allowed local notifications on your device.

The app uses Japanese definitions for dawn and dusk, which were established by a samurai during the shogunate era. These definitions closely resemble civil twilight, which starts and concludes when the sun's geometric center is 6° below the horizon. However, Dawn Alarm goes a step further by offering the option to enable civil twilight, making the dawn and dusk times correspond to civil dawn and civil dusk.

It's important to note that the developer, Takafumi AMANO, includes a liability disclaimer. They state that they disclaim all liability for any consequences arising from the use of the app and accept no responsibility for any damages, injuries, or losses resulting from app usage.

Overall, Dawn Alarm is a useful app for those who want to stay in tune with the changing light and plan their activities accordingly. Its accurate timing and the option to enable civil twilight make it a standout choice in the sunrise notification app category.