Privacy is very important to us.
No personal information is ever collected from you.
Anonymized information about how often you use the app may be sent to an analytics server, but this data contains no personally identifiable information. It's only used to improve All Day as a product.
In particular, while All Day requests your current location in order to provide you with relevant weather data, that information is never collected or sent to any place outside of your devices except to request weather data. Noone is given access to your physical location by All Day.
In fact, the current version of All Day collects no information about you at all. That may change in the future, but when that happens the above restrictions will be followed.