Guides
Explore your food, sleep and recovery history
Start with a useful record of meals and the readings your wearable already collects. These guides explain logging, sources and questions you can explore over time.
New to the connection? Start with Apple Watch and Apple Health, or read about WHOOP.
- Build a food-and-sleep history with Apple Watch or WHOOP
A practical 21-day meal logging routine with Apple Health or WHOOP, setup steps, a free printable checklist, and a guide for running clubs.
5 min read - How accurate is Apple Watch calorie burn? Check your own watch
Wrist-based calorie estimates can be far off. A 4-week method to measure your real daily energy use from your food log and weight trend, then correct your watch.
6 min read - Do late dinners hurt your sleep and HRV? A 3-week test
How to check whether eating close to bedtime affects your sleep, HRV and recovery, using your own WHOOP or Apple Watch data instead of general advice.
6 min read - Photo calorie tracking: how accurate is it, and how to make it better
AI photo food logging is fast but can't see hidden oils or how deep a bowl is. Where photo estimates go wrong, and habits that fix most of the error.
5 min read - How to see what your food does to your WHOOP recovery
WHOOP measures recovery, HRV and sleep but doesn't know what you ate. How to get a clearer read on meals, meal timing and alcohol against your own WHOOP numbers.
5 min read