▁Break up ▁Not ifier ▁was ▁a ▁web ▁application ▁written ▁by ▁product ▁developer ▁and ▁programmer ▁Dan ▁Lo ew en her z ▁that ▁enabled ▁its ▁registered ▁users ▁to ▁track ▁the ▁relationship ▁status ▁of ▁their ▁Facebook ▁friends . ▁An ▁email ▁notification ▁was ▁sent ▁to ▁the ▁user ▁when ▁one ▁of ▁their ▁Facebook ▁friends ▁changed ▁their ▁relationship ▁status . ▁ ▁The ▁app ▁was ▁one ▁of ▁the ▁most ▁vir al ▁Facebook ▁app ' s ▁at ▁the ▁time ▁of ▁its ▁release . ▁It ▁was ▁mentioned ▁in ▁a ▁sk it ▁on ▁The ▁Jay ▁L eno ▁Show ▁and ▁news ▁of ▁its ▁popular ity ▁was ▁published ▁in ▁Time ▁Magazine , ▁The ▁New ▁York ▁Post , ▁C NET , ▁and ▁The ▁Glo be ▁and ▁Mail . ▁ ▁Popular ity ▁and ▁Facebook ▁controvers y ▁▁ ▁Break up ▁Not ifier ▁gathered ▁ 1 0 0 , 0 0 0 ▁users ▁in ▁less ▁than ▁ 2 4 ▁hours ▁of ▁its ▁launch ▁and ▁reached ▁a ▁user ▁base ▁of ▁more ▁than ▁ 3 , 0 0 0 , 0 0 0 ▁in ▁February ▁ 2 0 1 1 . ▁Facebook ▁then ▁blocked ▁the ▁app . ▁ ▁Lo ew en her z ▁later ▁created ▁an ▁app ▁named ▁Cr ush ▁Not ifier , ▁which ▁diff ers ▁from ▁the ▁original ▁app ▁in ▁that ▁users ▁can ▁check ▁if ▁they ▁have ▁a ▁mut ual ▁cr ush . ▁Break up ▁Not ifier ▁was ▁later ▁un block ed ▁by ▁Facebook ▁and ▁mon et ized . ▁ ▁External ▁links ▁▁ ▁Official ▁website ▁Dan ▁Lo ew en her z ▁Cr ush ▁Not ifier ▁ ▁References ▁▁ ▁Category :