Fitbit Inspire 2 Science Test (It's great!): Sleep, Heart Rate, Step Review

I tested the Fitbit Inspire 2 against a scientific EEG device, and tested the heart rate and step counting accuracy.
👇Amazon Affiliate* (paid) links. Supports the channel, doesn't cost you any more!👇

*My opinions are completely my own. However, I do earn a small commission if you purchase any of these devices via my affiliate links. It does not cost you any more money if you use these links.

Twitter: @QuantifiedRob

🧾Amazon affiliate links (Support the channel😊; I earn a small commission)🧾
---FITBIT INSPIRE 2---

---FITBIT CHARGE 4---

📹Fitbit Videos📹

📹Apple watch videos📹

📹First Garmin Venu Sq Video📹

📹Oura Ring videos📹

📹Withings Scanwatch videos📹

⏱️This comparison is part of a larger project where I spend over 11 hours a week tracking everything in my life. If you'd like to know more:

Timestamps:
00:00 General intro
01:12 Inspire 2 Most Important Info
02:15 Results: Sleep Test Setup
03:12 Results: Sleep Test Comparison
07:09 Results: Sleep Test Overview
09:41 Results: Heart Rate Test
13:30 Results: Step Test
15:29 Conclusions
16:38 Should You Buy The Inspire 2?
17:08 Test Limitations

🎵Music🎵
(2) Wonders by JVNA
(3) Can’t Sleep (YouTube Audio Library)
(4) Classique (YouTube Audio Library)
(5) Blurry Vision (YouTube Audio Library)

Several small clips were used that were provided by Fitbit as part of their press kit.

[roundysquares]

Man, in all seriousness, your channel is absolute gold!! Please keep doing what you do. This is some of the best tech review content on YouTube period! You should have much, much more followers

[CameraHelmet]

I feel like this is the only channel that does serious reviews. All other reviews are people unboxing the damn watch for 10 minutes.

[donnie]

This is the first comment I’ve ever left on YouTube in 10 years. And you absolutely deserve it. Love what you’re doing. Keep it up!!

[beckz]

Yesss, someone who actually goes in depth scientifically for these fitness trackers!

[vicapple]

Hey Rob, I think it would be cool to have a video where you review which fitness trackers perform the best of all that you have analyzed in the three categories of step count, heart rate, and sleep. Love the videos!

[SoJuDaMaN]

Dear Rob, from the bottom of my heart I wish that your channel blows up and you become a 10mil+ youtuber for putting out this kind of high quality content. One suggestion to extend your reach: Do short videos on a regular basis (e.g. each quarter) to sum up the top3 sleep devices that you can recommend based on your thorough testing.

[commenter_]

I just keep rewatching all of your videos because they are so densely packed with information (in a good way), searched way to long for such a channel!

[hr-jdsc]

i have been reading all the reviews I could find before purchasing a fitness tracker. this is by far the most helpful! thanks so much and keep it up!

[bigwatt]

What I appreciate is your no nonsense straight talk no music needed approach.

[opocoyo]

This is so impressive! I haven't seen anyone put this much effort into a review. Thank you very much for the time and effort you put into creating this :)

[Benbeenbee]

This is pretty much the only scientific fitness tracker testing video I can find, and I'm truly impressed by the seriousness.
Keep up the good work, your content deserves more attention.

[dplace]

Love the videos keep up the good work I’m someone who is always looking for the most accurate devices to wear so I really appreciate the work you do.

[matteobraiuca]

Keep going Rob😊 you are the best in your field, your job is crucial and concretely useful!!💪

[morottaja]

These videos are amazing! Finally somebody does this right an provides actually helpful info and measurements. On behalf of the faceless youtube crowd I want to say - Thank you for your hard work!

[Erribell]

When it comes to something that tracks numbers of your body and health why are you the only one that's actually scientifically verifying accuracy on the review market. So crazy.

[sammyt]

The Inspire has basically the same functions as my Fitbit Alta HR (could be the same internal parts in a different casing for all we know!), which I tested against the full professional sensors used on me during a sleep study and found to be remarkably accurate compared to the results of that sleep study. Of course, my comparison was basically comparing the amount of time I spent in each phase, which was roughly the same, so it wasn't nearly as detailed an analysis as Rob used in this video, but they were impressive all the same.

[marion]

Thank you so much, Rob! I waer a Fitbit Alta HR for several years and always have issues with my heart rate measuring (I use a Polar H10 to compare my HR while running). The measuring differs up to 25-30 higher while training which is a lot - nonetheless I am a huge Fitbit fan and your test gave me the last push to try out the Inspire 2. Used your affiliate link to support your channel. 🙏

[johncraven]

Great video! One suggestion: on the HR scatter plot, perhaps you could make the data points from the weight lifting activity a different color dot compare to the cardio activities. Or even make a separate scatter plot with just the cardio (cycling/running) activities. It seems like most of the mismatch is from weight lifting which it appears most optical wrist trackers don’t capture. Thanks!

[silviui.]

I was looking forward to this video, great "present" you have given us on this Valentine <3

[잇비-ls]

this is what i've waiting. so thank u for ur vid. it is also good to the result of sleep accuracy and other things. have a nice day rob!