SunCalc+ is a simple app that will give not only sunrise and sunset times but also astronomical nautical and civil twilight (dawn and dusk) times. You can choose a date and location. * SunCalc+ sunrise sunset dawn dusk twilight times * is completely free and very easy to use.

All functions:
- sunrise
- sunset
- day length
- solar noon
- astonomical dawn
- nautical dawn
- civil dawn
- astronomical dusk
- nautical dusk
- civil dusk

The app requires GPS(to get your location) and internet(to download a small amount of astronomical data) to work properly.