Guides
Independent research on fitness wearables and the data they produce — what each platform measures, how its metrics are derived, and how to read your own training honestly.
Everything here is compiled from vendor documentation, published research and stated arithmetic. How we research →
Free tools
Apps & integrations
Hevy + WHOOP: do they connect?
No native integration, and the reason is structural rather than an oversight. How to run both in parallel.
Hevy integrations: what connects to what
A capability matrix for every major pair — who syncs, who exports, and who needs manual work.
WHOOP vs Hevy for strength training
Two different jobs. Which one you need depends on whether you want a logger or a readiness signal.
Using the WHOOP AI Coach
What the coaching features actually do, who they're for, and where the limits are.
Reading your own training data
Improve your strength using data
The five-rule framework: log completely, derive one number, read in blocks, separate volume from strength.
Tracking strength progression on WHOOP
What Strength Trainer records, what it leaves to you, and the derived number that makes progression visible.
Build an estimated 1RM trend
Turn logged sets into a progression line. Includes formula choice and accuracy limits.
Peak Load vs 1RM vs Top Set Output
Four records that look similar and mean very different things. Which one to trust.
Spot a lifting plateau
A numeric definition, the three things that mimic one, and what to try in order.
Does WHOOP recovery predict your lifts?
The effect sizes are smaller than the marketing implies. What the evidence supports.
Sleep consistency and your training data
Which sleep metrics are actionable, and why your stage percentages are decoration.
Google Health & Fitbit data
Google removed the Fitbit web dashboard in May 2026. This cluster covers what replaced it, where your data can go, and how to rebuild the scores you lost.
Google Health data: portals, scores and AI
What changed in 2026 and when, where your Fitbit data can go on iPhone versus Android, and the seven-day token trap every self-hosted tool hits.
Recreating WHOOP on Google Fitbit
The API inputs, the published scoring methods, and where a Fitbit reimplementation stops short.
Google Health alternatives: 7 dashboards
Seven tools that read your Fitbit data, compared on cost, hosting and data path — plus a decision tree, and what none of them can do.
Getting your Fitbit data into ChatGPT
Four routes that work in 2026. The right one depends entirely on whether you own an iPhone or an Android.
Fitbit Air: every feature explained
The sensors the new screenless tracker carries, what it cannot measure, and which features sit behind Premium.
Fitbit Air vs WHOOP
The hardware and subscription comparison — background worth having if you are deciding whether you need a recovery score at all.
Wearables compared
WHOOP strain vs other wearables
How WHOOP's 0–21 strain score compares with Fitbit Cardio Load, Garmin Training Load, Apple and Polar — and why the numbers don't transfer.
Sleep and recovery wearables without a subscription
Most sleep trackers work with no monthly fee. The full cost breakdown of what's free, what's gated, and the two that charge.
Best fitness tracker for recovery 2026
WHOOP, Oura, Garmin, Apple Watch and Fitbit compared on what they measure and where each falls short.
New WHOOP features in 2026
The 2026 feature releases, and which of them change anything for a strength athlete.
Top 5 reasons to buy the Fitbit Air
The case for a screenless, subscription-light tracker.
Top 5 reasons to stay with WHOOP
The counter-case, for lifters who already rely on a recovery signal.
The 2026 wearable landscape
Where the category is heading: screenless bands, rings, and the end of the smartwatch for some people.
Retired guides
Ten earlier guides have been removed: six described a product that no longer exists, and four drew almost no readers. If you landed on one from an old link, this page explains what happened.