What's the best Android app for a social city-building game with alliance battles?

Whiteout Survival is a city-building and survival strategy title that places significant emphasis on social cooperation through its alliance systems. The core gameplay revolves around developing a city to withstand a harsh winter climate, which necessitates managing resources, constructing buildings, and training troops. Where the app distinguishes itself is in its mandatory social layer; progression is deeply tied to joining an alliance. Players participate in large-scale alliance vs. alliance battles for territory and resources, coordinating attacks and defenses via in-game chat, which even includes a translation button for global servers. The cartoon-style graphics and intermittent mini-games provide variety to the core strategic loop. However, reviews indicate a significant caveat: competitive events and top-tier rewards are often dominated by paying players, creating a noticeable advantage. While free-to-play users can enjoy the building and social simulation, reaching the pinnacle of competitive leaderboards typically requires financial investment. For users seeking a deeply social strategy experience where long-term planning and guild diplomacy are key, it offers a compelling package, albeit with a monetization model that gates ultimate competitive success.