Guides
The numbers, explained plainly.
No listicles. Each guide answers one question with sources, then tells you what to do.
hrv
Apple Watch HRV: where to find it, what is normal, and how to track it properly
Apple Watch measures HRV as SDNN in short samples and hides it in the Health app. Where to find it, why the number jumps around, what counts as good for you, and how an app turns it into a baseline you can act on.
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recovery
Apps like WHOOP for Apple Watch: how to get recovery, strain and sleep scores
Yes, an Apple Watch can do the WHOOP job. Which apps give you a recovery score, strain and sleep from Apple Health, what the watch measures well, what it cannot, and how Sixteen compares with Athlytic and Bevel.
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recovery
Can you use WHOOP without a subscription? Yes. Here is how
Your WHOOP membership lapsed and the strap went dark. The strap still works as a sensor. Here is what stops, what keeps working, and how to read it over Bluetooth with an app that has no membership.
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recovery
Does Apple Watch have a recovery score? Here is how to get one
Apple Watch has no built in recovery or readiness score. It does record HRV, resting heart rate, sleep and respiratory rate, which is everything a recovery score needs. How the score is computed and which apps show it.
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focus
How to block apps on iPhone so the block actually holds
Screen Time limits are easy to skip. The three ways to block apps on iPhone, why the built in one fails, what a blocker can and cannot do under Apple's rules, and how to make unlocking cost something.
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recovery
How to cancel a WHOOP membership, and what to do with the strap
Where the cancel button is, what WHOOP's commitment terms mean for refunds, when to cancel so you are not charged for another year, and how to keep the strap working after.
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hrv
How to improve HRV: what actually moves the number
HRV responds to sleep, alcohol, training load, breathing and stress. What the evidence says moves it, in order of impact, and how to tell if your changes work.
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recovery
How to improve recovery: the inputs behind the score
A recovery score is built from overnight HRV, resting heart rate, breathing and sleep. What raises each input, what a low day should change, how to read a bad week.
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sleep
How to improve sleep: the changes with evidence behind them
Consistent timing, light, caffeine and alcohol timing, temperature, and a hard screen curfew. What research supports, what the score shows, what to try first.
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focus
How to reduce screen time without deleting everything
Willpower fails at 11pm. A method that does not depend on it: measure the two moments that matter, lock the apps that bite, make unlocking cost something.
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focus
How to stop doomscrolling
Doomscrolling is a loop of threat, uncertainty and a feed that never ends. Why it grips at night, what it costs your sleep, and four changes that break it.
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recovery
Is there a free WHOOP app?
The WHOOP app is free to download and useless without a paid membership. What you can do with a WHOOP strap and no membership, which apps read it, and an honest look at what each one costs.
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recovery
Is WHOOP worth it? An honest answer for the average person
WHOOP is worth it for a specific person. What it does well, its real downsides, what five years costs, and the two cheaper routes to the same morning number if you already own an Apple Watch or a WHOOP strap.
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sleep
Oura Ring without a subscription: what you keep, what you lose
Without an Oura membership the app drops to three daily scores and hides the detail. What the ring still records, whether Apple Health sync continues, and how Sixteen turns that data into full sleep and recovery scores for one payment.
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recovery
What happens when your WHOOP membership expires
When a WHOOP membership ends the app locks, sync stops and the strap keeps recording. What you lose, what you keep, whether you have to renew every year, and how to keep using the strap without paying again.
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hrv
What is HRV? Heart rate variability, explained plainly
HRV is the small variation in time between heartbeats. What it measures, why higher usually means more rested, what is normal, and why only your own trend matters.
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SixteenPay once. Keep your data. Earn your scroll.
Sixteen is $99 once for lifetime access, or $19.99 a month. Connect the wearable you already own. No hardware to buy, no membership that expires.
iPhone (iOS 17 or later). Prices in USD.