This has led to security concerns such as Zoombombing, in which individuals drop in uninvited on unsecured Zoom meetings.
Video conferencing apps such as Zoom have done particularly well, however.
Zoom was the most downloaded iOS app for the month, followed by popular video sharing app TikTok.
Zoom had another stellar month in the App Store as people worked from home during the coronavirus pandemic.
Zoom also last month acquired Keybase, a company with experience with encryption and security, to bring end-to-end encryption to Zoom meetings.