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Measuring live uses the LiDAR scanner on the Pro and Pro Max models. Doorframe needs iOS 26 or later. On an iPhone without LiDAR you can still enter heights, for example from a check-up, and see the Doorframe and growth charts.

Tap the Measure button in the tab bar. Stand them on the floor, about 1.2 to 3.5 metres away (closer for a baby lying down), with their head and feet in view, and hold roughly still. The ring around Capture fills and Doorframe captures by itself, then asks who it is. You can also tap Capture once it turns green. Turn Auto off if you'd rather always tap.

Every height shows its range (for example 91.2 cm ± 0.9 cm) and how confident Doorframe is. For the best reading, stand them straight on the floor, show their head and feet, use good light, and hold still. If the range looks wide, measure again.

Yes. Switch Measure from Standing to Lying, and lay them flat on the floor.

Tap + in the Library. Take Photo with LiDAR takes a still photo that keeps depth, so someone can be measured on their own. Enter a height adds a number you already have, such as one from a check-up.

Doorframe can't see a clear picture: check the lens is uncovered and clean. If it says it's too dark, turn on a light.

Open Measure and tap Open Settings, then turn on Camera. Or go to Settings, then Doorframe, then Camera. When you come back, Doorframe picks up where you left off.

Anyone: kids, grown-ups, grandparents. When you add someone, Doorframe asks whether they are a child or a grown-up. Children have a birthday, so their growth can be charted.

For babies, children and teens: the WHO standards up to age two and the CDC charts from 2 to 20, with the shaded 3rd to 97th and 25th to 75th percentile bands, their current percentile and how fast they are growing. Grown-ups get a steady height card instead.

From their own growth curve once they're two, from both parents' heights, or from both. You choose who a child's parents are in their profile; Doorframe never guesses. Every prediction shows its range.

No. Growth percentiles and predictions are information, not medical advice. If you're worried about how a child is growing, talk to their doctor.

Not together yet. Each iPhone keeps its own family; there is no sync between phones.

Yes. In a person's profile, tap Edit and set "Remind me to measure" to every month, every 3 months or every 6 months. Reminders are scheduled on your iPhone.

On your iPhone, and nowhere else. Doorframe has no account, no server and no sync, and it has nothing to send your family's heights or photos to.

To measure: the camera and LiDAR see how tall someone is. Nothing it sees leaves your iPhone. Doorframe never reads your photo library: if you choose to save a share card to Photos, iOS asks once, and Doorframe only adds that picture. It never asks for your location, contacts or Health.

Yes, in Settings, under Data. Export Measurements (CSV) shares every measurement as a spreadsheet file; Erase All Data deletes every person, measurement and photo.

Doorframe follows your region: feet and inches in the US, centimetres elsewhere. To choose, go to Settings, then Units.

Its data is deleted with it, unless it's in a backup of your iPhone.