No, it is free to download the equiwatt app and no ongoing membership fees currently apply.
Joining the equiwatt community is free and we'll keep it that way to help build the biggest possible community of energy savers.
There is no equipment that you need to install in your home either, although users can choose to use TP-Link smart plugs to connect household appliances to equiwatt and automate the participation in equivents.
If you do not already have a TP-Link smart plug, they can be purchased here.