I like taking sunset photos as a hobby, and I’ve lost count of the evenings I went out for a sunset that never happened, or stayed home and missed a good one. So I built Afterglow: 👉 https://afterglow.jeremytucker.co.uk What it does Scores every sunset and sunrise for the next 7 days from 0 to 100 (Poor → Fair → Good → Great → Epic), for anywhere in the world Explains the score instead of just giving a number: Cloud canvas: is there high and mid cloud to catch the colour? Light path to the sun: is there cloud 60–200 km out toward the sun that will block the light? Low cloud overhead, air clarity (haze, humidity, smoke) and rain Plays an animated preview of the evening, from golden hour through to the end of blue hour (or the reverse for sunrise), drawn from the actual forecast and the real horizon at your location from terrain data Tells you the peak colour time, and when the sun actually drops behind the hills (or clears them in the morning), not just the official time Alerts (optional): a heads-up at midday, a “go now” 90 minutes before golden hour, and a “called off” if it turns bad. It also does sunrise checks the night before and when you wake. Good to know No account, no ads, no tracking cookies No app store. It runs in your browser, and you can tap Install to keep it on your phone. On iPhone you need to install it to get alerts. Alerts are limited to a small number of places during the alpha, so if they’re full, try again in a few days Weather data comes from Open-Meteo. There’s a plain-English privacy page in the app. How it was made I’m not a developer. I built this with an AI coding assistant (Claude), while I came up with the ideas, tested it against real sunsets and decided what it should do. What would help most 📸 Post a screenshot of Afterglow’s score, plus a photo of what the sky actually did, with the time you took it. Whether it nailed it or got it completely wrong, that comparison is exactly what I need to make the forecasts better. ⚠️ Mind your privacy: the screenshot normally shows your place name. Tap the 👁 eye button at the top right of the picture to hide it first. Photos can also contain hidden location data; Reddit removes it when you upload, but other sites might not. Also really useful: Your location: does the horizon in the picture look like yours? Bugs: anything broken or confusing, especially on iPhone Features: what would make you actually use it? It’s very much an alpha (v0.2), so be gentle, but be honest!   submitted by   /u/Amberleaf [link]   [comments]