Video summary
All Fitbits Are Better Now!
Main summary
Key takeaways
Product(s) reviewed
- Fitbit Air vs. Fitbit Charge 6
- Emphasis that both use the same optical heart-rate sensor set.
- Notes that newer firmware and Google Health app updates may improve performance.
- Mentions other compatible/related Fitbit devices (e.g., Inspire 3, Charge 4/5) that may use the same sensor set and therefore perform similarly.
Key takeaways & verdict
Overall result
- Fitbit Air and Fitbit Charge 6 perform about the same for:
- Heart rate (during exercise)
- Night HR and HRV
- Sleep stage tracking
- Largely attributed to the shared sensor and improved software/firmware.
Recommendation
- Choose Fitbit Air if you want better convenience/fitness usability, especially because it can be worn on biceps, which can improve heart-rate accuracy.
- Choose Fitbit Charge 6 if you want great results for cheaper, since price differences may improve value without sacrificing much performance.
Availability / pricing context (given in the video)
- Fitbit Air
- Selling heavily; may require waiting ~2 months
- Price: about $99–$100 (US implied)
- Fitbit Charge 6
- Often cheaper: commonly $70–$80
- Prime Day / sales example
- Inspire 3 mentioned as selling for under $50
- Later says Inspire 3 around $50–$70, depending on deals
Testing setup & method (as described)
Reference devices used for validation
- ECG chest wrap (reference) for heart rate during exercise
- EEG sleep-tracking device (“ZMAX”) for sleep stages
Devices and approach
- Tested with Charge 6 using the new Google Health app + upgraded firmware
- Strap wear was made as comparable as possible (including strap tightness/fit).
Heart rate tracking during exercise (main results)
Exercise type comparisons
Indoor cycling
- Charge 6: correlation 0.98
- Fitbit Air: correlation 0.99
- Conclusion: Very similar, slight edge to Air on average.
Running outside
- Charge 6: correlation 0.98
- Fitbit Air: correlation 0.99
- Notes:
- Running can create periodic artifacts due to cadence.
- Video mentions some devices may lock onto motion frequency.
- Conclusion: Both solid, Air slightly better.
Biking outside
- Charge 6 (on wrist): correlation 0.94
- Fitbit Air (on wrist): correlation 0.92
- Conclusion:
- Charge 6 slightly better on average here
- Overall: “very similar range”
- Both can struggle in bumpy conditions.
Weightlifting
- Charge 6: correlation ~0.89 (written as “0.89 89”, interpreted as ~0.89)
- Fitbit Air: correlation 0.93
- Notes:
- Both struggle at higher heart-rate moments (wrist tension during sets).
- Video notes Charge 6 may detect fewer/less-perfect peaks, while Air can miss peaks in some sessions.
- Conclusion: Described as a minor overall difference, with correlation favoring Air.
Overall cardio heart-rate scoring
- Average heart-rate tracking score:
- Fitbit Air: 97
- Fitbit Charge 6: 96
- Both described as “great heart rate tracking performance.”
Competition/context (percent of other devices worse)
- The video compares devices using correlation across exercises.
- Percent of tested devices performing worse than Fitbit Air:
- Indoor cycling: 64% worse
- Biking: 57% worse
- Running: 80% worse
- Weightlifting: 71% worse
- Charge 6 is described as similar overall to Air (sometimes slightly better, sometimes slightly worse), and the speaker cannot say clearly better or worse.
Heart rate + HRV during the night
Night heart rate (HR)
- Charge 6 vs reference: strong agreement in ~40–55 BPM
- Air vs reference: very similar
- Conclusion: Both track nightly HR well with similar patterns.
Night heart rate variability (HRV)
- Charge 6: mostly matches reference; slightly lower HRV in higher ranges noted
- Fitbit Air: also very similar, with some axis shift/outliers
- Conclusion: Differences are small; patterns over time matter more than slight range shifts, so both are essentially equivalent.
Sleep stage tracking (EEG comparison with ZMAX reference)
Agreement percentages (device vs EEG reference)
Fitbit Charge 6
- Deep sleep: ~90%
- Light sleep: ~78%
- REM sleep: ~70%
Fitbit Air (wrist)
- Deep: ~85%
- Light: ~80%
- REM: ~73%
Video conclusion: Similar performance; neither is clearly better.
Sleep stage tracking examples
- Example nights show:
- Charge 6 sometimes detects slightly extra deep sleep
- Both show very close patterns night-to-night
- When comparing patterns over time, device differences are not meaningful.
Overall sleep score
- Fitbit Charge 6 sleep score: 79
- Fitbit Air sleep score: 79
- Labeled as “great sleep stage tracking.”
- Also stated: both are among the best devices tested.
Where they rank vs other sleep stage trackers
Top-performing brands mentioned include:
- Google/Fitbit devices (grouped)
- Apple Watch
- Aura Ring
- WHOOP strap (mentioned as #4)
- Eight Sleep Pod (mentioned as #5 overall)
Note: Eight Sleep Pod is not wearable—it’s a mattress/blanket system with independent temperature control.
Pros (as stated/clearly implied)
- Very strong sleep stage tracking
- EEG-validated performance
- Equal sleep score (79) for both devices
- Excellent heart rate tracking for cardio
- Air: 97
- Charge 6: 96
- Similar performance despite different form factors, attributed to:
- shared sensor
- firmware/software improvements
- Value potential
- Charge 6 often discounted heavily
- Inspire 3 also cited as a good deal
- Practical wearable advantage
- Fitbit Air recommended if you want to wear it on biceps for improved heart-rate accuracy
Cons / limitations mentioned
- Wrist-based heart rate is “pretty great,” but not the “very best”
- Performance improves more on biceps
- Exercise-specific struggles:
- Running: occasional deviations early; possible artifact/misalignment risk
- Biking outside: lower correlation (~0.92–0.94) due to bumps/handling
- Weightlifting: lower correlations, especially Charge 6 (~0.89) vs Air (0.93)
- Fitbit Air availability
- May have a long wait (~2 months)
Comparisons highlighted
- Fitbit Charge 6 vs Fitbit Air
- Heart rate: nearly equivalent overall; small exercise-dependent differences
- Sleep: essentially identical (deep/light/REM agreement close; both sleep score 79)
- Fitbit vs other top trackers (sleep stages)
- Fitbit/Google devices are grouped among the best alongside: Apple Watch, Aura Ring, Whoop, and Eight Sleep Pod
Unique points list (distinct mentions)
- Fitbit Air currently high demand; wait time about 2 months.
- Fitbit Air optical HR sensor claimed to be the same as in older Fitbit models (example: Charge 6).
- Charge 6 tested with Google Health app + upgraded firmware.
- Indoor cycling HR correlation: Charge 6 0.98, Air 0.99.
- Running outside HR correlation: Charge 6 0.98, Air 0.99; potential artifact from running cadence.
- Biking outside HR correlation: Charge 6 0.94, Air 0.92 (Air worse on wrist in this segment).
- Weightlifting HR correlation: Charge 6 ~0.89, Air 0.93; both struggle at high-tension moments.
- Overall cardio HR score: Air 97, Charge 6 96.
- Night heart rate tracking agrees strongly in ~40–55 BPM.
- Night HRV tracking slightly lower in high ranges, but patterns are similar.
- Sleep stage tracking uses EEG reference (ZMAX).
- Sleep stage agreement (Charge 6): deep 90%, light 78%, REM 70%.
- Sleep stage agreement (Air wrist): deep 85%, light 80%, REM 73%.
- Sleep stage score: Charge 6 = 79, Air = 79.
- Both described as among the best sleep stage trackers tested.
- Fitbit/Google devices ranked near the top versus Apple Watch, Aura Ring, Whoop, and Eight Sleep Pod.
- Eight Sleep Pod is a non-wearable mattress/blanket system with independent temperature control; noted as very effective but super expensive.
- Recommendation: Fitbit Air best if you want to wear it on biceps for improved heart rate accuracy and convenience.
- Recommendation: if you want cheap great sleep stages, Air or Charge 6; also older sensor models like Inspire 3 / Charge 4/5 likely similar.
- Inspire 3 deal mentioned around $50–$60 (varies by sale).
Speakers/views
- Single main speaker (“Rob”) presents and interprets all testing results and recommendations.
- No other speakers credited in the provided subtitles.