Last updated: October 28, 2026
Solar Window is a solar-forecast and appliance-planning app. It turns a weather forecast for your roof into a plan for when to run heavy appliances. This policy explains what the app stores, what it sends, and the choices you have.
DATA STORED ON YOUR DEVICE
Your system details (location name, latitude and longitude, array capacity, tilt, azimuth, losses and inverter rating), saved appliance plans, reminder times and recorded generation readings are stored only on your device. Solar Window does not upload them to our servers. Uninstalling the app or using Clear all data deletes them.
LOCATION
The app asks for your approximate location only when you tap Use my location. The coordinates are sent with the forecast request so the service can fetch weather for that spot. You can skip this and search for a town, city or postcode instead. Coordinates are used to answer that request and are not retained by us after the response is returned.
WEATHER DATA
Weather and solar irradiance data come from Open-Meteo. Your coordinates are sent to Open-Meteo as part of the forecast request, under their terms and privacy policy.
ANONYMOUS USAGE ANALYTICS
The app may send anonymous usage events to Amplitude to help us understand which features are used. Events may include app version, whether Pro is active, and actions such as saving a plan or opening the paywall. No location, no plan contents, no appliance names and no payment details are included. If analytics is not configured for your build, no analytics data is sent.
PURCHASES AND SUBSCRIPTIONS
Subscriptions are processed by Google Play. We receive subscription status (active or inactive) and product identifiers. We never receive or store your payment card details.
WHAT WE DO NOT COLLECT
We do not collect your name, email address, contacts, precise GPS location, photos, files or calendar contents. The app does not require an account.
SHARING
We share the limited analytics and subscription data described above with Amplitude and Google Play as service providers. We do not sell personal information.
RETENTION AND SECURITY
Analytics events are retained according to our Amplitude plan and used only in aggregate. Data is transmitted over encrypted connections. Data stored on your device remains under your control.
CHILDREN
Solar Window is a household planning tool intended for users aged 18 and over. It is not directed to children.
YOUR CHOICES AND DATA DELETION
You can clear all app data at any time in the app under System > Clear all data, or by uninstalling the app. Both remove everything the app stored on your device.
CHANGES TO THIS POLICY
If this policy changes, the updated version will be published on this page with a new date.
CONTACT
Questions about this policy: robin421@gmail.com