The government has not made it compulsory for the public to use mobile device apps that scan Quick Response (QR) codes for registration when entering any business premises, says Datuk Seri Ismail Sabri Yaakob.br br The Senior Minister (Security) said that on Wednesday when asked about premises that forced the public to download and use such apps before they were allowed in.br br Ismail however added that its use was encouraged for convenience and it’s not compulsory.