WhatsApp alternative Signal tops free app charts on Apple's App Store in India It has also topped Apple’s App Store charts in Austria, France, Finland, Germany, Hong Kong, and Switzerland. January 09, 2021 / 02:33 PM IST Messaging platform Signal saw a surge in downloads this week after WhatsApp made a modification to its privacy policy. On Saturday morning, Signal tweeted that it had topped the list of free apps on Apple’s App Store in India. Following an endorsement by the world’s richest man Elon Musk, the messaging app saw a massive uptake in downloads. Due to the surge, Signal’s servers were unable to handle the influx and verification codes were delayed. However, that issue seems to be resolved.