AR sun mapping · iOS + Android

You'll see the house once.
You should see the whole year.

A property showing lasts 30 minutes. Sunlight changes over 365 days. Where Is The Sun points through your camera at any window, deck, or garden — and shows you exactly where the sun is, where it will be, and how many hours of direct light that space gets, on any date, in any season.

Download on theApp Store Get it onGoogle Play
Where Is The Sun showing a golden-hour sun position over a lake view

The listing says "great natural light." You see the house at 2pm on a Tuesday in April. By Thursday night you need to decide.

For buyers

The answers no listing gives you.

Before you make the biggest purchase of your life, see what the listing photos won't show — and what you'll never get back if you get it wrong.

During the showing

Walk every room. Point your phone. Get a year of data.

  • Point at the kitchen window. See 6:30am summer sunrise land right where you'd have your coffee.
  • Point at the master bedroom. Find out it gets hit by 45° afternoon sun in July — and blocked by the neighbor's oak in December.
  • Point at the deck. Know it goes fully shaded at 3pm in October, two months before you'd ever host there.
Before you offer

Decisions a second visit can't give you.

  • Compare winter to summer. Toggle any date. See the sun path across the sky for December 21st, June 21st, and everything between.
  • Plan what the house needs. Solar panel viability. Blinds budget. Which room becomes the home office.
  • Avoid the "I didn't realize" regret. Dark north-facing rooms. Unlivable summer afternoons. Both invisible at 2pm in April.
For real-estate agents

The differentiator you can demo in 30 seconds.

Turn "how's the light?" — the single most-asked, hardest-to-answer question in residential real estate — into a moment that closes.

Listing presentations

Win the listing with data sellers have never seen.

  • Prove golden-hour photography. Show the seller you'll shoot the front facade at the exact minute the sun lands on it — not guess.
  • Quantify the outdoor space. "Four hours of direct sun on the patio at summer solstice." Specific beats subjective.
  • Identify hidden selling features. North-south orientations, winter-warm breakfast nooks, shaded summer retreats.
Showings & objections

Answer the light question with zero guesswork.

  • Handle the "does it get sun?" objection. Hand them your phone. Let them time-travel to the winter solstice. Objection gone.
  • Compete against new construction. Prove that the 40-year-old Craftsman outperforms the new build's sun exposure.
  • Build trust through transparency. You just told them something they can verify. They remember that.
Inside the app

Everything you need in the camera view.

No menus. No modes. Point, scrub, know.

AR sun overlay

Live AR sun overlay

Astronomically accurate sun position rendered on your live camera feed. Move the phone — the sun moves with you, pinned to the sky where it really is.

Date picker

Time-travel any date

Jump to the summer solstice, winter solstice, or any day of any year. The sun moves to where it was — or where it will be — in real time.

Seasonal insights

Seasonal insights

Today vs. summer vs. winter, side-by-side. Peak altitude, hours of direct sun, climate-specific advice for 20+ US metros.

Sun exposure forecast

Quarterly exposure forecast

Point at any viewport. See exactly when the sun enters the frame, how long it stays, and when it leaves — for each season of the year.

3D compass rose

3D compass rose

A perspective compass painted on the ground plane. See which way the house actually faces — and which way it should.

Moon tracking

Night mode with correct moon phase

After sunset, the sun is replaced by an accurate moon — rendered at the right phase, in the right place. Late showings covered.

How it works

Three steps. One minute per room.

01

Point

Open the app. Hold your phone up at the window, deck, or garden you care about. The sun indicator appears instantly, pinned to the real sky.

02

Scrub

Drag the timeline back to sunrise. Forward to sunset. Jump to a date six months from now. The sun moves, the shadows move, the data updates.

03

Know

Read the hours of direct exposure. See summer vs. winter side-by-side. Make the decision the listing couldn't answer.

Precision that matters

Military-grade astronomy. In a consumer app.

The sun is the only variable in home buying that can be calculated exactly. We calculate it exactly.

Jean Meeus
Astronomical algorithms, the same math used by observatories and aviation software.
NOAA-validated
Verified across 7 US cities, at equinoxes and solstices, sunrise through sunset.
±1° accuracy
Sensor-fused heading with Kalman filtering. Tilt-compensated. Magnetometer calibrated.
Zero servers
All computation runs on-device. Works offline, works in basements, works everywhere.
Privacy by design

Your location never leaves your phone.

No accounts. No tracking. No analytics. No cloud sync. The camera is the content, the sensors are the compass, and both stay exactly where they are.