Cardiogram has made a name for itself as one of the biggest heart health apps, available on smartphones, Wear OS smartwatches and the Apple Watch. One place it hasn't been present so far is on Fitbit devices, but it's finally rolling that out too.
The latest version of Cardiogram, available on iOS and Android, adds support for Fitbit devices that include a heart rate sensor - so Alta HR, Inspire HR, Versa, Ionic, and the range of Fitbit Charge devices.
Read this: How Cardiogram is unlocking the humble heart rate sensor
Cardiogram leverages its algorithms with heart rate and sleep data to tell users how exercise, diet and stress are affecting their health. And while it's not FDA approved, Cardiogram posits a high enough level of accuracy to detect atrial fibrillation, hypertension, sleep apnea and even early signs of diabetes.
Cardiogram's secret sauce is in a deep neural network it calls DeepHeart, which the company says has been through numerous "rigorous" clinical studies. While it's not bringing any new features to Fitbit specifically, Fitbit's wearables boast longer battery life than the Apple Watch and Wear OS devices, meaning Cardiogram will be able to analyze data over longer periods of time. They also work with both iOS and Android smartphones.
Fitbit's devices are also designed for sleep tracking, allowing Cardiogram to mine data through the night. With permission, users can share their data with Cardiogram to help refine its algorithms too.
Cardiogram is available as a free app download, although there is a paid subscription level called Cardiogram Premium, which lets you share your data with family members or your physician.
How we test
By Hugh Langley
Now at Business Insider, Hugh originally joined Wareable from TechRadar where he’d been writing news, features, reviews and just about everything else you can think of for three years.
Hugh is now a correspondent at Business Insider.
Prior to Wareable, Hugh freelanced while studying, writing about bad indie bands and slightly better movies. He found his way into tech journalism at the beginning of the wearables boom, when everyone was talking about Google Glass and the Oculus Rift was merely a Kickstarter campaign - and has been fascinated ever since.
He’s particularly interested in VR and any fitness tech that will help him (eventually) get back into shape. Hugh has also written for T3, Wired, Total Film, Little White Lies and China Daily.