Calibration on iPhone 5s Compass and Level Appears Incorrect

iPhone 5s devices appear to be reporting inaccurate information through the compass and inclinometer apps, reports Gizmodo and Cult of Mac.

The compass appears to be off by 8-10 degrees, while the inclinometer is consistently incorrect by 2 degrees on level services.

Incorrect iPhone 5s Level

iPhone 5s and level, courtesy Gizmodo

You see a pretty dramatic illustration of the difference between the iPhone 5S internal inclinometer readings and a real measurement of inclination. A simple Stanley spirit level tells the whole story: The iPhone 5S level readout in the iOS 7 compass software read 2-3 degrees off in our tests, while other users are reporting that the level is off by as many as 4-6 degrees. We performed the same test with an iPhone 5, and readout was almost perfect, indicating that hardware is at least partly the culprit. That also means a fix might not be as easy as an OTA firmware update.

There is a twenty-page thread on the MacRumors forums with readers reporting similar experiences with the compass and level on the iPhone 5s, as well as a number of threads on the Apple Support website.

It's unclear whether the motion sensors themselves are incorrect, or if it is just a calibration issue with the software interpreting the data and displaying it to the user. Apple has not commented on the problems. It's likely that a software update could fix the issues as the numbers appears to be fairly consistent across all iPhone 5s devices.

The M7 motion coprocessor is a big selling point of the iPhone 5s; it is supposed to act as a health and fitness tracker to measure steps and motion of the device with very little battery loss.

Popular Stories

ios 26 1 slide to stop

iOS 26.1 Brings Back 2007 Feature in New Way

Friday October 31, 2025 1:40 pm PDT by
The upcoming iOS 26.1 update includes a small but helpful change for iPhones, and it could prevent you from running late to something important. Specifically, when an alarm goes off in the Clock app, there is a new "slide to stop" control on the screen for turning off the alarm. On previous iOS 26 versions, there is simply a large "stop" button, which could be accidentally tapped. The new ...
M5 MacBook Pro

Waiting for New Macs? Apple Just Shared Bad News

Friday October 31, 2025 7:32 am PDT by
Apple has just given a strong indication that it will not be releasing any additional new Macs for the remainder of the year. Apple's CFO Kevan Parekh dropped the hint during the company's earnings call on Thursday:On Mac, keep in mind, we expect to face a very difficult compare against the M4 MacBook Pro, Mac mini, and iMac launches in the year-ago quarter.Parekh essentially gave a heads up ...
iPhone 17 Pro Cosmic Orange

8 Reasons to Wait for Next Year's iPhone 18 Pro

Thursday October 30, 2025 4:42 am PDT by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...
iOS 26

6 New Things Your iPhone Can Do in iOS 26.1

Wednesday October 29, 2025 4:22 am PDT by
Apple is about to drop iOS 26.1, the first major point release since iOS 26 was rolled out in September, and there are at least six notable changes and improvements to look forward to. We've rounded them up below. Apple has already provided developers and public beta testers with the release candidate version of iOS 26.1, which means Apple will likely roll out the update to all compatible...
Apple Foldable Thumb

iPhone Fold: Launch, Pricing, and What to Expect From Apple's Foldable

Friday October 31, 2025 8:52 am PDT by
Apple is expected to launch a new foldable iPhone next year, based on multiple rumors and credible sources. The long-awaited device has been rumored for years now, but signs increasingly suggest that 2026 could indeed be the year that Apple releases its first foldable device. Below, we've collated an updated set of key details that have been leaked about Apple's foldable iPhone so far. Ove...
Coffee Burgundy and Purple iPhone 18 Pro Mock 1

Leaker Outlines Potential New Colors for iPhone 18 Pro

Friday October 31, 2025 8:28 am PDT by
Apple's iPhone 18 Pro models could be available in new rich and warm color option, according to a known leaker. The Weibo user known as "Instant Digital" today suggested that next-year's iPhone 18 Pro models will be available in at least one of the following color options: Coffee, purple, and burgundy. The iPhone XR, iPhone 11, iPhone 12, iPhone 14, and iPhone 14 Pro were all available in ...
apple tv hd

Apple Launched Its Big New Vision for TV 10 Years Ago Today

Thursday October 30, 2025 8:58 am PDT by
Apple launched the Apple TV HD, the Siri Remote, tvOS, and their accompanying App Store a decade ago today, marking a major overhaul of the device. The new vision for the Apple TV was unveiled on September 9, 2015 during Apple's "Hey Siri" event in San Francisco, where CEO Tim Cook introduced the device with the statement, "The future of TV is apps." The announcement represented a major...
iOS 26

Apple This November: iOS 26.2 Beta, Rumored New Products, and More

Thursday October 30, 2025 12:42 pm PDT by
Tomorrow is Halloween, and then November is upon us. Below, we outline what to expect from Apple next month, as the slower holiday season approaches. Apple is expected to kick off November by releasing iOS 26.1, iPadOS 26.1, macOS 26.1, watchOS 26.1, tvOS 26.1, and visionOS 26.1. With beta testing now wrapped up, the updates will likely be released this Monday, November 3 or Tuesday,...
iOS 26

iOS 26.1 Coming Soon: New Features for Your iPhone and Release Date

Monday October 27, 2025 7:55 am PDT by
The upcoming iOS 26.1 update includes a handful of new features and changes for iPhones, including a toggle for changing the appearance of the Liquid Glass design, "slide to stop" for alarms in the Clock app, and more. Below, we outline key details about iOS 26.1. Release Date Given that Apple has yet to seed an iOS 26.1 Release Candidate, which is typically the final beta version, the...
iOS 18 Siri Personal Context

Apple CEO Tim Cook Says Revamped Siri on Track to Launch Next Year

Thursday October 30, 2025 1:50 pm PDT by
Apple CEO Tim Cook today said that a more personalized version of Siri remains on track to launch at some point next year, with the new set of features expected to debut on the iPhone as part of iOS 26.4 in March or April. "We're also excited for a more personalized Siri," said Cook, on Apple's earnings call for the third quarter of the 2025 calendar year. "We're making good progress on it,...

Top Rated Comments

Plutonius Avatar
158 months ago
It's calibrated for Apple maps :D.
Score: 50 Votes (Like | Disagree)
Lousawyer6 Avatar
158 months ago
just tested mine, off by 2 degrees... Luckily i never plan on using my smartphone as a level.
Score: 32 Votes (Like | Disagree)
baryon Avatar
158 months ago
Uhm, can't you just calibrate it by double tapping the screen or something similar? That's why you have calibration, because these things tend to be off by default. How could there not be software fix? Even if the accelerometer is mounted wrong inside the device, all you need to do is add or subtract a few degrees from it via software and it should be fine.
Score: 27 Votes (Like | Disagree)
JAT Avatar
158 months ago
First world problems
List yours that aren't. Or stop whining about people.
Score: 15 Votes (Like | Disagree)
jrswizzle Avatar
158 months ago
That is how other level apps worked that I have used on the iPhone. I don't believe the one that comes with the iPhone (the compass/level app) allows you to do that. Unless there is a bigger issue.
No, it does.....set the 5S on the table and tap. It will zero out to whatever the table is at. Essentially, just take a level (like they do in this picture) - put your phone up to it and make it its level, then tap to set 0.

This isn't an issue, and honestly I'm surprised its a story on Macrumors.....unless I'm completely missing something.

The other side is that how do you know - if the level is user "settable" - that its inherently wrong? Doesn't mean something is wrong with the internal hardware.....
Score: 14 Votes (Like | Disagree)
Sodner Avatar
158 months ago
20 pages late MacRumors. Nice job!

And yes people this is a real problem. It can affect the sports/exercise functionality (M7 Chip), many games, panoramic photos, etc. The phone does not know what level is, where north is. And they are all off to varying degrees. This is not a "your holding it wrong" fix. Its a potential recall of "x" million phones type problem.
Score: 12 Votes (Like | Disagree)