Named after my dog (a very good boy), Hamilton solves a simple problem: if you own a Garmin watch AND a Withings scale AND maybe a Fitbit or Samsung device, your health data is scattered across half a dozen apps. Hamilton brings it all together into one clean dashboard.
YOUR DATA STAYS ON YOUR PHONE
Hamilton has no internet permission. Not "we promise not to send your data" — it literally cannot connect to the internet. No analytics, no tracking, no cloud sync, no account. Open the app, see your numbers, done.
Check for yourself: Hamilton requests zero network permissions. The permission list on this page is the proof. Your privacy policy is built into the app too — readable offline, because there's nothing to fetch.
WHAT HAMILTON DOES
Hamilton reads from Android Health Connect, so it works with any device or app that writes there — Garmin, Withings, Fitbit, Samsung Health, Oura, Whoop, Google Fit, Strava and many more.
Metrics at a glance:
• Steps, distance, active calories and total calories
• Weight, body fat, lean mass, body water and bone mass
• Heart rate, resting heart rate and heart rate variability (HRV)
• Sleep duration and sleep stages
• Blood oxygen (SpO2), breathing rate and skin temperature
• Floors climbed, hydration, nutrition and mindfulness minutes
BUILT FOR PEOPLE WITH MULTIPLE DEVICES
If your phone and your watch both count steps, most dashboards add them together and tell you you walked 19,000 steps. Hamilton doesn't. It picks your best single source for each day, so your totals are never double-counted.
Switched watches? Your history stays continuous — Hamilton stitches your old device's data to your new one. Or pin any metric to the app you trust most and it will only use that one.
If you've ever opened Garmin Connect to check your steps, switched to Withings for your weight, then opened a third app for nutrition — Hamilton replaces all three trips with one glance. It doesn't replace those apps; they keep syncing to Health Connect as usual. Hamilton just reads what's already there.
FEATURES
• Home dashboard with live tiles and 7-day sparklines
• Trends — chart any metric over days, weeks or months
• Overlay a second metric, and offset it by a number of days to spot lagging correlations
• History for daily breakdowns, each reading with its source
• Sleep stage breakdowns, night by night
• Nutrition macros — protein, carbs, fat, fibre and sugar
• Body composition — weight as lean vs fat mass
• Optional background refresh — Hamilton can fetch while closed so your dashboard is current when you open it. Off by default, and it posts a notification each time it runs. Still no internet: it only reads Health Connect, on your phone.
• Metric toggles, data source picker, pull to refresh, dark and light modes
PAY ONCE, OWN IT FOREVER
One payment. No subscription, no trial that expires, no losing your dashboard if you stop paying.
THE HONEST BIT
Hamilton is read-only — it never writes to or modifies your Health Connect data. And it can only show what's in Health Connect: if your device or app doesn't sync there, Hamilton can't see it. It's a private viewer, not a cloud aggregator. That's the point.
Requires Health Connect.
A NOTE FROM HAMILTON THE DOG
Woof. I don't understand what any of these numbers mean, but my human seems very excited about them. I mainly contributed by sitting on his lap while he coded this and making him get his steps in. You're welcome.
This app is not a medical device and does not diagnose, treat or prevent any condition.