Install zapzap, a desktop whatsapp client on ubuntu linux

zapzap is a desktop whatsapp client built for linux, and available to be installed via flathub. To install zapzap in ubuntu and its derivatives:

Install flatpak

$ sudo apt update && sudo apt install flatpak -y

Add flathub repo

$ flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo

Install zapzap using flatpak

$ sudo flatpak install flathub com.rtosta.zapzap

Once installed, launch zapzap. You will be presented with something like below

Follow the steps in the above picture, which are

You should now be able to use your whatsapp in zapzap