A free program for Android, by Wiggle Woggle.

Raft Survival Ark Simulator is an action survival game with RPG elements, where you have to build your own home on a raft in the ocean. You will have to face dangers such as sharks and other ocean creatures, as well as hostile scientists. You will need to collect resources and build tools and weapons to protect yourself from these dangers. The game will be based on survival, so you will need to gather all the resources you need to craft weapons and armor to fend off dangerous mobs.

You will be able to explore the ocean and get resources by fishing, gathering plants, and hunting. You will have to fight hostile mobs, and hostile scientists.