In Russia, people use all sorts of apps but there are still top apps that are installed literally on every phone here.
First of all, the most used apps are definitely social media apps. Vkontakte is the most frequently used messenger in Russia, however, Telegram has been gaining popularity over the past couple of years.
Moreover, a few months ago, the app Telegram reached its peak of downloads among Russians due to banning of other social platforms and easy access to the various information about the ongoing war.
In addition, VPNs became indispensable apps for a couple of last months. VPN is used to bypass regional restrictions on using some other apps, so Russians install them, for example, in order to access Instagram and Facebook. However, it is hard to name most common VPNs. The Russian authorities ban some of them practically every day, so people often have to delete banned apps and find new ones.