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Move your iPhone slowly until the crosshair turns solid yellow, then tap +. Textured, well-lit surfaces work best; plain white walls and glass are hardest. iPhones with LiDAR (Pro models) are the most accurate. Stay within about 10 ft (3 m).

The crosshair hasn't found anything to measure yet. Move a little closer, add light, or aim at something with texture, and wait for the crosshair to turn solid yellow.

Open Level, place the phone on the first surface and tap Compare two surfaces. Then place it the same way on the second surface: the number is the angle between them.

Good for estimates (roofs, yards, driveways) and usually within a few percent, but not a survey. Imagery can be slightly offset or out of date.

Elevation, county and flood zone come from U.S. government services and only cover the United States. Street-level imagery is only available where Apple has captured it.

You can try every tool free, 3 times a day. Guesstimate Pro is a one-time purchase that unlocks everything with no limits and works with Family Sharing. There is no subscription.

Open Guesstimate, tap ··· on the home screen, then About & settings › Restore purchase, signed in with the same Apple ID.

Purchases are handled by Apple. Request a refund at reportaproblem.apple.com.

Yes. There's no account and nothing is collected. See the Privacy Policy.