Kangru

Blood type info is never around exactly when you need it. Kangru organizes your loved ones' blood types, computes donation compatibility and turns sharing into a single tap — while your data stays on your device. HIGHLIGHTS • Contacts list: Save family and friends with their blood types — your family, your spouse's family and others, organized in one list. • Donation compatibility: Who can donate to you and whom you can donate to — automatic across all 8 ABO/Rh groups. • Emergency mode: Pick the blood type, find a nearby hospital; a help message is ready in seconds. • Emergency alerts: Get notified instantly when someone in your list urgently needs blood. Phone numbers are never sent in the clear — they are irreversibly hashed. • Share lists via QR: Share your list with a QR code; if the recipient approves, people are added to their own list. • Nearby sharing: Exchange blood-type cards with nearby Kangru phones — no internet required. • Widget set: Home screen and lock screen widgets keep your blood type one glance away. • Badges: Unlock levels from Droplet to Kangru Legend as your network grows. • Face ID lock & encrypted backups: Lock the app with Face ID; backups are AES-GCM encrypted. PRIVACY FIRST Kangru has no servers of its own. Blood types and your contact list are stored only on your phone; sharing starts only when you choose. Emergency alerts travel through Apple's iCloud infrastructure. IMPORTANT NOTE Compatibility information in Kangru is based on general ABO/Rh rules and is for informational purposes only; it is not medical advice. Always consult healthcare professionals before any blood donation or transfusion.