Android
APK installer with sign-in. Enable “Install unknown apps” for your browser, then open the file. The checker sits between the top bar and the import buttons.
check-wireguard.graphai.eu
Android and iPhone apps
Same 10-second checker, with native import to wireguard-data and wireguard-map.
iPhone without the App Store
Home Screen (no store, no IPA). In Safari open the checker, tap Share, then Add to Home Screen.
IPA sideload. Apple will not run an unsigned IPA. Sign this file with AltStore, Sideloadly, or Xcode using your Apple ID (7-day cert on a free account).