Sensors are great at the physical stuff — steps, sleep, heart rate. They're useless at telling you why you felt off all afternoon, or that you barely drank water. That's the gap Sanna's daily check-ins fill. A few taps for water, mood, and a quick journal give your AI coach the human context that a wristband can't measure.
Water: the easiest lever to miss
Hydration quietly shapes energy, focus, and how you feel after a workout — and it's one of the simplest things to fix once you're actually tracking it. Logging your water in Sanna takes a second and turns "I think I drank enough" into something your coach can factor into the day's guidance.
Mood: the signal your watch can't read
Two identical days on paper can feel completely different. Logging your mood gives Sanna the piece no sensor captures — how you actually felt. Over time, patterns surface: maybe your mood dips on short-sleep days, or lifts after you move. Naming it is the first step to acting on it.
Journaling: context in your own words
A quick journal entry — a stressful meeting, a great run, a rough night — gives your coach the story behind the numbers. When you later ask why a week felt hard, the answer isn't just "HRV was low"; it's connected to what was actually going on in your life.
Why check-ins make the coaching better
Your health score tells you what your body did. Check-ins tell Sanna how it felt and why. Together they let the AI coach give guidance that fits your real day instead of generic advice — "you're under-slept and dehydrated, keep it light today" lands differently than a number alone.
And it stays private
Your journal, mood, and the rest of your health data never leave your device — Apple Health data is processed locally on your phone. It's the same privacy principle behind Secure AI: the insight is yours, and it stays that way.
Give your coach the full picture
Sanna pairs your Apple Health data with quick check-ins for water, mood, and journaling — so its guidance fits how you actually feel. Private by design.
Sanna is a wellness and accountability tool, not a medical device, and its guidance is not medical advice. Talk to a healthcare professional about any health concerns.