In short: Software Based QoS targeted at non-hardware savvy people who want to multitask on their crap internet connection better.
Which is easier for the uninitiated: Purchasing and setting up a DD-WRT router and implementing custom QOS rules or installing an application and changing numbers in a box next to an application name?
Which is easier to perform/less interruptive on the fly for a power user: opening an application GUI and changing a number in a box, or logging into a router, changes QoS rules and probably restarting it?
Older thread about this: https://forum.glasswire.com/t/feature-request-application-speed-limiting-bandwith-management/1718/4
Sorry for the necropost, almost 3 years later this is still a feature i'd like to see implemented in the free/paid version