y ▁amongst ▁some ▁former ▁users ▁of ▁the ▁i Player ▁Radio ▁app , ▁who ▁claim ▁that ▁the ▁functionality ▁does ▁not ▁have ▁the ▁same ▁features ▁as ▁before , ▁and ▁that ▁the ▁new ▁app ▁is ▁not ▁supported ▁for ▁older ▁versions ▁of ▁smart ph ones . ▁Some ▁broad sheet ▁newsp apers ▁have ▁claimed ▁that ▁these ▁changes ▁dis pro port ion ately ▁affect ▁older ▁listen ers , ▁particularly ▁those ▁who ▁listen ▁to ▁speech ▁and ▁comedy ▁content ▁on ▁Radio ▁ 4 ▁ ▁Development ▁ ▁BBC ▁S ounds ▁on ▁the ▁web ▁was ▁built ▁from ▁the ▁ground ▁up ▁in ▁the ▁Node . js , ▁React , ▁Red ux , ▁and ▁Express . js ▁programming ▁languages . ▁The ▁mobile ▁applications ▁were ▁written ▁in ▁Swift ▁for ▁iOS , ▁and ▁in ▁K otlin ▁for ▁Android . ▁Again ▁these ▁were ▁written ▁from ▁the ▁ground ▁up . ▁The ▁apps ▁were ▁released ▁on ▁ 2 6 ▁June ▁ 2 0 1 8 , ▁before ▁the ▁website ▁had ▁any ▁S ounds ▁brand ing , ▁in ▁order ▁to ▁gain ▁early ▁feedback . ▁ ▁App ▁features ▁include ▁the ▁ability ▁to ▁look ▁up ▁station ▁sched ules , ▁download ▁and ▁share ▁media , ▁re wind ▁live ▁radio , ▁and ▁listen ▁in - car ▁via ▁either ▁Android ▁Auto ▁or ▁Apple ▁Car Play . ▁ ▁Both ▁the ▁website ▁and ▁the ▁apps ▁are ▁served ▁with ▁data ▁from ▁a ▁single ▁set ▁of ▁APIs ▁called ▁Radio ▁and ▁Music ▁Services , ▁or ▁R MS , ▁micro services ▁built ▁in ▁the ▁Scala ▁programming ▁language . ▁This ▁single ▁source ▁of ▁data ▁rep laces ▁a ▁large ▁number ▁of ▁different ▁services ▁that