I started Sundown because I kept losing track of my days. Time flew by and I couldn't tell where it went. So I built something to track them. After a while of using it, I could finally see what my days were made of. Version one was just for me. It had no real design, only blocks. Checking in took too many steps for such a simple app, and the colors were off. That didn't bother me much, because I only cared that it worked. The name and a short description were the only hints about what the app was for. Then people started writing to me. More than ten emails came in about Sundown, plus a few kind comments. That changed how I saw it. Sundown wasn't only mine anymore. If other people were going to use it every day, it had to look good as well as work. First, I made check-ins simpler. Four pages became one. I set myself two limits: a check-in had to take about 30 seconds or less, and it couldn't need more than 10 to 15 taps. Anything longer would make it a chore, and people drop chores. Then I fixed the colors, and that took the longest. I tried a lot of palettes, did research, and none of them felt right. So I went to the source. Every weekend for three months, I watched the sunrise and the sunset. The Dusk and Lavender themes came straight from those mornings and evenings. After checked-in the palate slightly changes. (If you are a Sundowner, you will like it!) But none of that is the most important part. The most important part was one comment: "I use Sundown to think about tomorrow, so I can have a better day." People found their own ways to use it. Some use it to plan a better tomorrow. Some use it to track their time. And some just want to see where their time goes, like I did.