Privacy Policy
Effective date: October 29, 2026
SunArch is an iPhone app that calculates the sun's position, shadows, solar energy estimates and facade sun studies. This policy explains what data the app uses, where it goes and why. SunArch is developed by Rafael Barzotto ("we").
In short
- No account, no sign-in and no ads.
- No tracking: we don't follow you across other apps or websites, and we don't sell or share data for advertising.
- Most calculations happen on your iPhone. We never receive your location.
Location
Your location (from GPS or a place you choose on the map) is used on your iPhone to calculate the sun's position, sunrise and sunset. To show weather, addresses and maps, it is sent to:
- Apple — Apple Weather (WeatherKit), address lookup, maps, place search (the text you type) and Look Around.
- NASA POWER — rounded to 2 decimal places (about 1.1 km), to get the monthly climate averages for the solar estimates. The answer is stored on your iPhone.
Requests to NOAA (space weather data) don't include your location. We don't receive or store your location on any server.
Onboarding answers (anonymous)
Unless you turn it off (the option “Share data to improve SunArch” is on by default, on the last step of the introduction), the app sends to our database (hosted by Supabase) the answers you chose: how you will use the app, your main goal, your profile, the approximate size of your solar system, and whether location access was allowed, postponed or denied. Along with them go a random ID created when the app is installed (not your device identifier or your Apple Account), your device region's country and currency, the language, the app and iOS versions and the iPhone model (for example "iPhone17,1"). No name, email, phone number, coordinates or address. We use this only to understand which features people need. Without internet, the answers wait on your iPhone and are sent later. You can turn this off anytime in Settings → Review app introduction, on the last step; answers not yet sent are then deleted from your iPhone.
SunArch Pro subscription
Purchases are processed by Apple; we never receive your payment details. To confirm that your subscription is active, the app sends to Qonversion (our subscription management service) a random ID created when the app is installed and, for each SunArch Pro purchase, the App Store transaction IDs, the product, price, currency and date. Apple also notifies Qonversion about renewals, cancellations and refunds. Your subscription status is also checked on your iPhone with Apple's signed transactions.
iCloud
Your saved solar sites (name or address, location, time zone, panels, tilt, orientation and, if you enter them, consumption, electricity bill and tariff) are copied to the private iCloud database of your own Apple Account, so they appear on your other devices. Only your Apple Account can read this data; we can't access it. You can delete it in iCloud settings.
Camera and photos
In Sun AR and Facade AR, the camera image is only shown on your screen. A photo is created only when you tap capture; it stays on your iPhone until you save it to Photos or share it. The app only asks to add photos to your library and never reads it. Facade inspection photos are kept inside the app until you finish the study. Nothing is uploaded by the app.
Data stored on your iPhone
Settings, formats and units, currency and electricity price, saved solar sites, the Comfort & Facades study, map and AR preferences, and cached climate data. Deleting the app deletes this data.
Keeping and deleting data
- Data on your iPhone: delete the app.
- iCloud copy: Settings → [your name] → iCloud → Manage Storage → SunArch.
- Onboarding answers are anonymous and can't be linked to you; we keep them to measure how the app is used.
- Subscription records are kept by Qonversion while needed to manage the subscription.
You can ask us about your data, or ask us to delete it, at the email below. Depending on where you live, you may have rights under laws such as the GDPR (Europe) or the LGPD (Brazil).
Children
SunArch isn't directed to children under 13 and doesn't knowingly collect their data.
Changes
If this policy changes, we'll update this page and the effective date above.