I’ve been using Logos Bible Software since 2009 and have spend a couple grand on resources. Since Logos 5 and the mobile app, I love it because of the access to all my Greek and Hebrew language tools, all my commentaries, and other resources, but also mainly because of the great annotation tools that sync across all my platforms.
Faithlife Study Bible is their free app, which usually comes with the Lexham English translation, but now they are giving away the ESV resource for free. The great part of this app, which shares the same Logos framework, is that you get the free built-in Study Bible resource along with videos and the like.
Another great feature is the ability to read along your friends with community notes and the such! I do all my annotations in Logos, which syncs with FaithLife! Here’s a quick video!