Imithi emikhulu yomthi wom-oki yaseKhalifoniya iye yagawulwa ngamakhulu amawaka sisifo esanikelwa ingxelo okokuqala ngowe-1995 saza sabizwa ngokuba “kukufa ngequbuliso komthi.” Ukufumana umbono obanzi ngesi sifo, izazinzulu zase-UC Berkeley zenze i-app ye-smartphone yabakhweli kunye nabanye abathandi bendalo ukuba baxele imithi abayifumene yoyiswe kukufa ngequbuliso kwe-oki.
Ngolwazi oluthe vetshe malunga ne-app, into eyenzayo kunye nendlela yokuyifumana, tyelela OakMapper.org.