The school that I work for uses KAHOOT for lots of activities. You can make review games that they can use to improve their scores. They also love to have fun while learning. Kids can also make their own BLOOKET to share with the class as a project.
I also enjoy using Kahoot! and am glad when I see it on the sub plans for the day. I will have to explore BLOOKET. I like to have a few ideas in my back pocket for the sub assignment where I might be without sub plans or not enough provided material.
I have loved using Kahoot with my first grade students! They are so engaged and interested when we play a Kahoot game. I love the feature of having them practice the questions they answer incorrectly after the game as well.