The most useful feature is to keep track of tasks I have pending with different apps or people via email which can be accessed from anywhere at any given moment through my smartphone (android).The ability to assign due dates has also been very helpful in managing projects as it allows me to set deadlines accordingly. Sometimes there are errors when logging into some websites while using this app so make sure you check if everything works properly before giving an update about its useability issues. It's quite simple yet effective way to manage all ongoing activities across multiple platforms including social media sites like Facebook etc., As well as other applications such as emails/calendars among others.