Install Family Guardian
Use the Android APK, install the iPhone PWA from Safari, or build the native iOS IPA from GitHub Actions and sideload it with a free Apple ID.
Android
Download and sideload the APK from this server.
Download APK
iPhone PWA
Open https://138.124.184.182.nip.io/app in Safari, sign in, then Share -> Add to Home Screen. GPS works while the PWA is open.
Open iPhone web app
Native iOS sideload
Download FamilyGuardian-unsigned.ipa from the GitHub Actions workflow, then sign/install it on Windows with Sideloadly or AltStore.