Whether you want to record a class, business meeting, concert or anything else, apps that turn our smartphones and tablets into versatile audio recording devices just keep getting better and better. Here are three of the best to consider: Voice Record Pro is a simple yet robust recording app that allows for recordings of unlimited length. It records in a variety of formats, including MP3. You can even bookmark important sections of recordings for quick and easy reference. Recordings can be uploaded to Google Drive, Dropbox, OneDrive, Box, and Soundcloud. Voice Record Pro is for iOS only and free, though for $3 you can get it without ads. Audio Memos is…