What's the best Android app for a casual underwater action game with satisfying character progression?

Hungry Shark Evolution is a longstanding Android title from Ubisoft Entertainment that pits players as a shark navigating vibrant underwater worlds. The core appeal lies in its progression loop: starting as a modest reef shark, users consume fish, humans, and other objects to grow, unlock larger species like the megalodon, and upgrade abilities with items such as laser beams or jetpacks. Missions and daily challenges provide structured goals, preventing aimlessness, while varied environments from coral reefs to Arctic waters keep exploration fresh. For casual play, the intuitive tilt-and-tap controls make it accessible, and the gradual unlocking of content offers a sense of achievement without demanding constant attention. However, reviews indicate that progression can slow at higher levels due to gem scarcity and expensive upgrades, which some find frustrating. Additionally, the mobile version receives more frequent updates and features compared to TV ports, as noted in user feedback. Despite these hiccups, the game's regular content additions, including new sharks and events, help maintain longevity. It's a solid choice for players seeking a lighthearted action game with tangible growth mechanics, though patience is advised for free-to-play users navigating the economy.