Measuring person height doesn’t work using Lidar and measure app

Settings > General > Reset > Reset all Settings resolved the issue for me!

I deleted the measure app and re-installed it form the app store. After this, it did work and I was able to measure a person's high.

I can confirm reset all settings worked for me as well. Kinda annoying but at least it probably cleared other bugs that were not obvious.. had to go through Face ID, Apple Pay and even reactivate iMessage again after resetting all settings

Please create support case with Apple to get their attention. I created a case and it is now associated with an emerging case they already have. It seems to be tied to using restore to set up new phone. I have restored 4 phones to set up new iPhone 12 and all have the same issue.

Rest All is a painful experience

“Reset All Settings: All settings—including network settings, the keyboard dictionary, the Home Screen layout, location settings, privacy settings, and Apple Pay cards—are removed or reset to their defaults. No data or media are deleted.”

Excerpt From

iPhone User Guide

Apple Inc.

https://books.apple.com/us/book/iphone-user-guide/id1515995528

This material may be protected by copyright.

For me the trick resetting all settings also worked.

Interestingly Apple did not know about this apparently. They made me exchange my brand new iPhone and let me wait for 2 weeks for a replacement. When I restored again from my backup, I ran into exactly the same issue as I had before. I then reset all settings and it started to work.

Solution : it’s probably because you backed up the phone from iCloud so old settings interfere with the Lidar so basically just reset all settings and it should work

UPDATE:

I backed up and restored my phone today, and this has fixed the issue with it not measuring height! :)

Just go to Settings > General > Reset > Reset all Settings resolved the issue for me!

however your wifi passwords, phone settings and Apple Pay will be lost so you will have to reconfigure them again

iOS 14.3 has fixed this for me! Patience paid off as I didn’t have to go nuclear by resetting settings.

I restored it from an iCloud backup

Reset All Settings worked for me, as well! Thanks!

Absolute shambles this LiDAR sensor is. Doesn’t seem to work / measure height using the standard measure app with the iPhone. Spent and wasted 3 days talking to Apple about this issue to a point where I wanted to try and get another new phone via Applecare..... They expect you to pay £1000 / full value of the iPhone until they recieve your old one back!

luckily I’ve come across this post as I’m not the only one experiencing this issue. My partner also had her 12 pro last night, her phone is doing the exact same thing. It’s definitely a software bug.

Tried resetting my settings and this hasn’t solved anything. I downloaded a 3D scanner app via the App Store as someone said to try, I can confirm that the LiDAR works on that, because as soon as I cover the sensor that app stops scanning.

Please hurry up and sort this apple!

I have a Pacific blue 128GB 12 pro.

my partner has a silver 128GB 12 pro.

iOS 14.3 has fixed it and it works OCASSIONALLY.

It works for me like once in every 4-5 attempts.

AND the margin of error is extremely HUGE.

I tried it with my wife and it was off by 5 CM, 5CM... give me a break!

This is completely useless.

Good that I didn't upgrade because of LIDAR.

This must work without having to reset anything. May be an IOS update is due.

I had the same issue and resetting as someone suggested fixed the problem.