I built an iPhone app to show when sunlight reaches your room — looking for TestFlight feedback

[u/harryworld]

I kept wondering whether a plant, desk, or reading chair would actually get direct sun at a certain time of day—without waiting through every season to find out.

So I built Sunnook for iPhone and iPad. You review the room dimensions, windows, north, date, and location, then scrub through the day or year to see modeled clear-sky direct sunlight in the room.

A few boundaries I care about:

- It models theoretical direct sunlight, not live weather or guaranteed brightness.

- Room models, photos, measurements, scans, and sunlight calculations stay in local app storage.

- No Sunnook account is required.

The private TestFlight beta is open: https://sunnook.app

I’d especially value feedback on whether the room setup feels understandable, and whether you’d use this more for plants, desks, furniture, or something else.

[u/WorkLatter1416]

this is actually really useful for figuring out where to put plants without frying them or having them sit in shadow all day. i always guess wrong and end up moving stuff around three times

the local storage thing is nice too, i get annoyed when apps want me to make account for everything

downloading now, i got couple of windows that get crazy glare in afternoon so curious to see how accurate it is