If you're still looking for a free activation key, consider the following options:
Have you found a legitimate way to get OfficeSuite Premium for free? Share your experience in the comments below (no illegal keys, please).
While official "free" activation keys for OfficeSuite Premium are not distributed for free by the developer, there are several legitimate ways to access the premium features or the suite itself at no cost. Official Ways to Get OfficeSuite Premium for Free
Set a calendar reminder for day 6 to cancel if you don’t want to pay. This gives you a full week of Premium access at zero cost.
: Cloud-based tools that are free to use with any Google account.