Hëlth

Copies Apple Health data from one iPhone to another. On the phone that has the data, Send reads Health into one .healthcopy file; AirDrop it; on the other phone, Receive writes it into Health, skipping anything that's already there. Nothing goes over the network: the app has no networking code at all, no analytics and no third-party code. helthtransfer.com has the help and the privacy policy. The Xcode project still uses the working name, HealthCopy.

When the phone with the data can't have the app, Receive takes the export the Health app itself makes instead (profile > Export All Health Data): export.zip, the unzipped folder, or export.xml. The home screen shows both ways. HealthCopy/Import/AppleExport.swift reads it and turns it into a .healthcopy file on the phone, then the copy runs as usual, matching what's already there to the second (the export has no sub-second times, six-digit values and no UUIDs).

• scripts/build.sh builds for the simulator and prints only diagnostics.
• scripts/roundtrip.sh runs the whole flow across the "HC Source" and "HC Target" simulators (a UI test answers Health's permission screen) and compares the target with the source file record by record (scripts/compare).
• scripts/apple-roundtrip.sh export.zip truth.healthcopy does the same for Apple's export: the HealthAppExport UI test makes a real export.zip with the simulator's Health app, Send makes the truth from the same phone, and scripts/applecompare checks the target against it.
• scripts/appleexport converts an export on the Mac with the app's own code; scripts/gen/enums.py regenerates AppleNames.swift from the SDK's HealthKit headers.
• scripts/upload.sh <build> archives and uploads to App Store Connect for TestFlight.
• store/ has the App Store listing (listing.md) and what the store art is made from: store/capture.sh takes the raw screens from the simulators, and store/compose.sh renders the screenshots (iPhone and iPhone Duo), the header and search art and their videos (not in git). The website is its own repo.

What can't be copied is Apple's rule, not this app's: apps can't write Exercise, Stand or Move minutes, heart rhythm notifications, walking steadiness or asymmetry, wrist temperature, AFib history, breathing disturbances or the cycle deviation alerts, and every copied record shows Hëlth as its source (the original device is kept).