The impact of coronavirus was evident across the top free list on iPhone for 2020.
Zoom ranked number one and Microsoft Teams at seven, as people turned to video conferencing technology to work from home, stay in touch with family and continue schooling.
Taking the second spot is the NHS Covid-19 app which was released late September as a tool to help alert users if they have been in close proximity with anyone who has tested positive for coronavirus.
Social networks and chat apps such as WhatsApp, Houseparty, Instagram and Snapchat also sit in the top 10, with TikTok leading the pack at third.
Driving Theory Test 4 in 1 Kit and Official DVSA Theory Test Kit were once again revealed as the top paid-for iPhone apps of 2020.
Online multiplayer social title Among Us! was named most popular free iPhone game, while Football Manager 2020 Mobile was top in the paid game category.
On iPad, Zoom also landed at number one in the free apps chart, followed by Disney+, Netflix and Amazon Prime.
Graphic editing software Procreate and note-taking app GoodNotes 5 led the top paid iPad apps.
"This year, more than ever before, some of our most creative and connected moments happened in apps," said Phil Schiller, Apple fellow.
"This was thanks to the amazing work of developers who introduced fresh, helpful app experiences throughout the year."
Alongside the most downloaded apps, Apple also revealed its own editorial picks for best apps of 2020.
Light exercise app Wakeout! was named iPhone app of the year, while iPhone game of the year went to action role player Genshin Impact.
Elsewhere, Zoom was awarded iPad app of the year and Legends of Runeterra iPad game of the year.