Heart Analyzer App Gains Blood Oxygen Complication for Apple Watch Series 6 - MacRumors
Skip to Content

Heart Analyzer App Gains Blood Oxygen Complication for Apple Watch Series 6

Heart Analyzer today reached version 8.3, bringing some notable improvements to the popular heart health app including new complications and customizations.

heart analyzer watch
Top of the list for Apple Watch Series 6 owners will be the new Blood Oxygen Saturation complication, which lets you track the SPO2 metric over the past week with a glance of your watch face.

There's also a new complication that shows the chart for today and yesterday's heart rate, and a new toggle in workouts that lets you view heart rate zones by percentages or time in zone.

Meanwhile, on the iPhone app, a new custom scaling feature lets you fix the minimum and maximum values on heart rate day charts for better day-to-day comparisons.

Following version 8's big update earlier this year, the developer has also introduced a new heart rate chart complication, ECG comparisons on the iPhone app, and iOS 14 widgets.

heart analyzer copy
The app never transmits any data from the users ‌iPhone‌, and there are no third party analytics and no ads. Heart Analyzer is a free download for ‌‌iPhone‌‌ on the App Store, and users who wish to support development can unlock small options via in-app purchases. [Direct Link]

Popular Stories

Dynamic Island iPhone 18 Pro Feature

11 Reasons to Wait for the iPhone 18 Pro

Monday May 11, 2026 9:01 am PDT by
We're only four months out from the launch of Apple's premium next-generation smartphone lineup, and while we're not expecting a sea change in terms of functionality, there are still several enhancements rumored to be coming to the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth noting is that Apple is reportedly planning a major change to its iPhone release cycle this year, adopting a...
iOS 26

iOS 26.5 Features: Everything New in iOS 26.5

Monday May 11, 2026 5:09 pm PDT by
Apple released iOS 26.5 after a few months of beta testing, and while it doesn't have the Siri features we were hoping for since those are being held until iOS 27, there are a handful of useful changes worth knowing about. Subscribe to the MacRumors YouTube channel for more videos. End-to-End Encryption for RCS Support for end-to-end encryption (E2EE) for RCS messages between iPhone and...
General Apps Reddit Feature

Reddit Starts Blocking Mobile Website, Pushing Users to App Instead

Monday May 11, 2026 6:10 am PDT by
Social network Reddit recently began blocking mobile visitors to its website while pushing them to download the official Reddit app, and it's fair to say that the move is not going down well with users. If you visit reddit.com on your iPhone today, you may see a new popup that can't be dismissed, asking you to "get the app to keep using Reddit." A Reddit spokesperson told Ars Technica...

Top Rated Comments

72 months ago
Glad to see this app getting attention. I purchased all of the IAPs; the data is fantastic.
The developer has been responsive to feedback as well.
The O2 measurement, like HR, will be much more valuable over a long time scale with large data sets. Heart Analyzer will enable that!
The effect of a few drinks, or consistent exercise, is easy to see in the data. Good motivator!

“Heart Monitor” is another good one - activates the higher-fidelity HR sensor without triggering a “workout.”
Score: 3 Votes (Like | Disagree)
ProfessionalFan Avatar
72 months ago
I've been using this app for awhile, it is a great free app.
Score: 3 Votes (Like | Disagree)
litmag01 Avatar
72 months ago
Wow! That is a lot of medical information. Now let me just plug all this into google to check symptoms then I'll be all set!
Score: 2 Votes (Like | Disagree)
CmdrLaForge Avatar
72 months ago
This sounds great if it works as advertised. Looking forward getting a new Watch myself.
Score: 1 Votes (Like | Disagree)