Is there a good iOS app for a relaxing yet challenging survival game that's okay for kids?

Raft® Survival is a mobile title centered on surviving and expanding a raft in a vast ocean. The core appeal for a family-friendly, challenging experience lies in its straightforward mechanics: players gather floating debris to build tools, purify water, cook food, and construct ever-larger floating bases. The primary antagonist is a persistent shark that attacks the raft, creating tension without graphic content. Reviews indicate the cartoonish art style and direct survival systems resonate with younger audiences, often cited as a better alternative to more complex online games. Specific features like the constant need to manage hunger and thirst provide a consistent, tangible challenge, while the incremental progression of building from a few planks to a multi-story raft offers satisfying long-term goals. Some players note that inventory space can feel restrictive in the early game, which adds to the strategic layer of resource management. The presence of optional video ads for rewards and a separate app for multiplayer are common points of feedback, with users wishing for a more integrated experience. However, the core single-player loop is generally considered well-executed and engaging for extended periods.