Lower training load today
Your HRV is 11% above baseline but sleep efficiency dropped two nights in a row. A Zone 2 day will keep you trending up.
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Sanna turns your health data into a single daily readiness score and explains it. All processing happens on-device. Integrates directly with Apple Health on your iPhone.
Unlike most health apps, Sanna runs entirely on your iPhone. No cloud processing, no tracking, no creepy data collection. Your health data never leaves your device.
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Trend is climbing - keep weekly mileage stable.
Average
72
Resting HR
baseline 54▼
HRV (rMSSD)
baseline 61▲
Respiratory rate
baseline 14▲
SpO₂
baseline 97▼
Skin temp.
baseline 35.9▼
VO₂ max
baseline 47▲
Your HRV is 11% above baseline but sleep efficiency dropped two nights in a row. A Zone 2 day will keep you trending up.
Two short peaks during meetings, fully cleared by your evening walk. Pattern matches the last 6 Wednesdays.
On nights with >40 min of late blue light, you take 14 min longer to fall asleep on average.
Sanna · model v3.2 · processed locally