Open this link in Safari. Use Share (sometimes inside Page Menu), then Add to Home Screen and Add. If offered, turn on Open as Web App. Open the shortcut online once and wait for Offline ready.
Open this link in Chrome. Use its menu, then Add to home screen or Install app when offered. Menu labels vary. Wait for Offline ready before going offline.
Use the included self-contained HTML file, this browser link, or install from your browser when offered. Initial online access is required for this hosted edition.
Personal records are saved in this browser on this device. They are not inside the HTML file and do not sync automatically. Download JSON backups regularly, especially before changing browsers, clearing browser data or updating. Backup files contain readable personal notes; keep them private.