Now in private beta

The quietest, smartest
health app on iPhone.

Sanna turns your Apple Health data into a single daily readiness score - and explains it. All processing happens on-device. No cloud, no account, no tracking. Just signal.

  • On-device

    0 bytes uploaded

  • Neural Engine

    Model v3.2

  • Sources

    14 HK streams

9:41
readiness-value
Readiness78Primed
vs. 14-day avg6
Recovery4
82/ 100
Sleep3
71/ 100
Stress load8
34/ 100

14-day readiness

Trend is climbing - keep weekly mileage stable.

Average

72

2 weeks agoToday

Vitals

Live from Apple Health

Resting HR

52bpm

baseline 54

HRV (rMSSD)

68ms

baseline 61

Resp. rate

14.2br/min

baseline 14

SpO₂

97%

baseline 97

Skin temp.

35.7°C

baseline 35.9

VO₂ max

48ml/kg

baseline 47

On-device insights

Private

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.

Stress recovered well after 18:00

Two short peaks during meetings, fully cleared by your evening walk. Pattern matches the last 6 Wednesdays.

Sleep onset slower on screen-late nights

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