Mark Zuckerberg's social media site came out on top, according to a report from research company App Annie.
Facebook's other apps, Messenger, WhatsApp, and Instagram also made the top 5.
Snapchat was in fifth place, with Skype, TikTok, YouTube, and Twitter also making the top 10.
In a blog post, Adithya Venkatraman of App Annie commented:
"Communication and social media apps are consumer favorites, accounting for 7 of the top 10 apps by downloads this decade (sic)"