Explainer
what is sunset verify?
What is Sunset Verify and how does it work?
Sunset Verify is a feature in the Vesper weather app that predicts sunset quality on a zero to one hundred scale each afternoon using atmospheric data from SunsetWx. After sunset users can rate the sky or take a photo and Vesper compares its prediction to the user rating, publishing a transparent accuracy score.
how it works
Predict
Each afternoon, Vesper analyzes atmospheric data from SunsetWx — cloud cover, humidity, aerosol levels — and generates a sunset quality score from 0 to 100.
Capture
After sunset, you rate the sky on a 1-10 scale. You can also snap a photo — it stays on your device, never uploaded. The rating takes less than five seconds.
Grade
Vesper compares its prediction to your rating and publishes the accuracy match. Over time this builds a transparent track record that anyone can see.
why it matters
Most weather apps make predictions and never look back. If yesterday’s forecast was wrong, there’s no record, no accountability, no learning.
Sunset Verify is different. By publicly grading its own predictions, Vesper holds itself to a standard that no other weather app has attempted. It turns a one-way broadcast into a conversation between the app and the sky.
who built it
Sunset Verify was built by the Vesper team and uses atmospheric quality data from SunsetWx, a service that specializes in sunset and sunrise quality forecasting using satellite imagery and atmospheric modeling.
Frequently Asked Questions
Who created Sunset Verify?
Sunset Verify was created by the Vesper team and uses atmospheric data from SunsetWx to generate sunset quality predictions.
Is Sunset Verify available on Android?
Yes. Sunset Verify is available on both iOS and Android versions of the Vesper app.
Can I share my sunset verification?
Sunset verification data and photos are stored locally on your device. Sharing features are planned for a future update.
Try it