Some of the 'features' listed above are flat out wrong. WhatsApp already lets you hide your last seen via a toggle in the settings. It also lets you change your theme, although the choices are quite limited. Everything else is a minor QoL improvement, but nothing that most users will use throughout the course of daily use. However, one of the most egregious claims made by the developer is as follows:
Apparently, you can just' sideload' GB WhatsApp onto your iPhone by 'downloading' the installer file. That is flat out impossible, as Apple doesn't users sideload apps on to the iPhone from...pretty much anywhere. This alone should set off alarm bells in the minds of users.
Therefore, we recommend that you stay away from GB WhatsApp or any such third-party clone that purports to 'add' or 'improve' upon existing WhatsApp features. By default, WhatsApp encrypts all messages end-to-end, ensuring that nobody other than you and the recipent can read it. You lose that privilege with these bootlegged versions and run the risk of your personal information being harvested by unscurpulous third parties.