Cairn

about

description

Cairn reads your health and fitness data from the phone's health store — Apple Health on iOS, Health Connect on Android — and saves it as plain, open-format files (Open mHealth / IEEE 1752.1 JSON) in your own Nextcloud. You stay the sole owner of your data: there is no central server and the developer stores nothing. Requirements: * Android 14 or newer. Cairn reads through Health Connect, which is part of the system only from Android 14; on Android 8-13 it is a separate Google app from the Play Store, which a Play-less device cannot install — so the app would find nothing to read. * A Nextcloud of your own is optional: without one, Cairn still reads and shows your data, it just keeps the files on the phone. Features: * Reads heart rate, steps, body weight, sleep and workouts — read-only. Cairn never writes to your health store. * Syncs the files to your own Nextcloud over WebDAV, with optional background sync. * In-app dashboard with a sleep-stage deep-dive and a BMI computed from your latest weight. * Available in English and German. Privacy: * No advertising, no analytics, no trackers, no third-party services. * Your data lives only on your device and in the Nextcloud you control — never in any developer or third-party cloud. * HTTPS only. The Nextcloud app password is stored in the operating system's secure storage and can be revoked at any time. Cairn is an aggregator and viewer, not a medical device. It makes no diagnostic or treatment claims.

publisher

78ce6faa72264387284e647ba6938995735ec8c7d5c5a65737e55130f026307d

first seen

2026-10-08T01:40:29.954267+00:00

last event

2026-10-08 01:40 UTC

install

zapstore.dev or any Zapstore-compatible client

source & build

repository

https://github.com/luminaappsdev/cairn

arch flags

android-arm64-v8a

manifest

not fetched yet

releases (kind 30063)

1 release indexed; latest 0.3.0.

assets & verification

Every app, release and asset event is schnorr-verified (NIP-01 id + signature) before it enters the catalog, and assets are content-addressed by sha256. We subscribe read-only to the catalog relay — never write to it.

0.3.0 — com.luminaapps.cairn_92.apk

sha256

f900ec487fbc50375b9022298f3854c107e4f2821e8a9f2cb10543ea4021b881

size

20.0 MB

archs

android-arm64-v8a

version code

92

apk cert sha256

b53624a0de7eef20330857f3cc0f261fce1e5eeb4c60ad42a9f9487a8daac9e0

download

com.luminaapps.cairn_92.apk

Showing the newest 1 asset descriptor; the full set is in /api/apps/78ce6faa…