Even better now
This night clock and alarm app is the best I’ve found, and I’ve looked at a lot. No on screen ads, no bright lights, and very configurable or simple. I like it because I can set it to a red, dim display that does not disturb my sleep, and see the alarm to music or bird songs and ramp up the volume over 2 or 5 minutes, which gives a gentle but firm wake-up. Highly recommended.