Your Apple Watch knows something about last Tuesday that you don’t.
Maybe your heart rate spiked 40% above baseline during a 2pm meeting. Maybe you had
your deepest sleep in weeks—right after an evening walk. Maybe there’s a pattern
between your Thursday fatigue and your Wednesday habits.
The data exists. It’s been quietly accumulating for years. But the Health app
just… shows you graphs.
Mosaic is an iOS app that came from wanting to actually understand what my Apple Watch has been recording all this time.
What it does:
Mosaic watches your biometrics and surfaces moments worth noticing—not medical
alerts, but invitations to be curious about your own patterns:
• Hot Blocks & Calm Blocks — periods when your heart rate ran notably high or low
compared to your baseline
• Move Days & Sedentary Streaks — activity patterns that stand out from your norm
• Deep Recharge & Fragmented Nights — sleep sessions that were unusually restorative
or disrupted
• Smooth Landings — when a calm evening led to quality sleep (so you can repeat it)
• Compound Load — when physical exertion stacked with poor sleep, signaling your
body needs recovery
The Explorer:
This is the feature I built for myself. Tap any episode and see the full picture:
your heart rate chart with the moment highlighted, what was on your calendar, where
you were, and how it connects to surrounding days. It’s the context that transforms
data points into actual understanding.
Trends & Correlations:
Beyond single moments, Mosaic tracks multi-day patterns. Is your resting heart rate
creeping up? Is your HRV declining? Are your sleep disruptions correlated with
late-night screen time? It surfaces these quietly, without alarm—just observation.
The spirit:
This isn’t a health monitoring app. It’s a health curiosity app. Everything runs
entirely on-device—no cloud, no account, no data leaving your phone. Just your own
patterns, surfaced for your own discovery.
If you’ve ever scrolled through Apple Health wondering what story your data is
trying to tell you, this is my answer to that question.