Sunup has no accounts, no advertising and no analytics. It never asks for your device location. This page says what the apps do send, where it goes and how long it stays there.
effective 4 september 2026
Neither app requests location permission, and neither contains any code that reads the device's location. You find a place by typing its name. The coordinates Sunup works with are the ones belonging to the place you chose, not to you.
Your saved places, your settings and the most recent forecast for each place are held in a database on the device and are not copied anywhere else. On the Mac that database lives in your Application Support folder.
Sunrise, sunset, moon phase, wet bulb temperature and heat index are calculated on the device from the saved coordinates and the date. They are never sent anywhere to be worked out.
The two apps are built differently and reach the weather by different routes.
As with any server, ours sees the network address your device connects from. It is not stored in a database or attached to your saved places.
Notifications are off until you turn them on, and they are the only reason anything about a saved place is kept on our server. The Mac app has no notifications at all.
When you enable them, the iPhone app sends a push token for the device along with each place you have chosen to be alerted about: its label, its coordinates, its time zone, and which of the three kinds of alert you want. That is what the server stores. It is never told which place you are currently looking at, and nothing refreshes in the background.
Weather alerts come from the National Weather Service. Precipitation alerts are worked out from Apple Weather's next-hour forecasts, which means the coordinates of a place you have enabled them for are sent to Apple. Delivery runs through Google's Firebase Cloud Messaging, so the notification itself passes through Google on the way to your device.
Sunup contains no analytics and no advertising code, and nothing about you is sold or shared with anyone beyond the five above.
Removing a saved place tells the server to forget its subscription, and it is deleted along with everything recorded about alerts sent for it. Turning notifications off stops anything further being sent. Deleting the app removes everything held on the device.
If a push token stops working — which is what happens when an app is deleted — the server drops the whole device record the next time it tries to send to it. There is nothing left to identify you with afterwards, because there never was.
Sunup is not directed at children under 13, and it collects nothing that would identify anyone of any age.
If the apps start doing something this page does not describe, this page changes first. The date at the top is when it last did.
Questions about any of this, or a request to delete something, go to [email protected].