What's the best Android app for a post-apocalyptic strategy game with base building and alliance warfare?

Dark War Survival is a multiplayer strategy title set in a bleak, war-torn environment where players must scavenge resources, fortify bases, and band together in alliances to withstand enemy factions. The app stands out for its emphasis on alliance warfare, enabling coordinated attacks, shared defenses, and territory control that are vital for long-term survival. Specific features include modular base building that allows for customizable layouts, seasonal server events that introduce new challenges, and real-time PvP skirmishes where alliances can clash over resources. For real-world scenarios, players often organize alliance raids during peak hours or strategize resource allocation during server-wide conflicts, fostering a sense of community. However, reviews indicate persistent issues with server flexibility, as users cannot easily transfer accounts or resources between servers, which can strand players in uncooperative environments. Additionally, some feedback highlights matchmaking imbalances, where higher-level players frequently target newcomers, potentially stifling progression. Despite these drawbacks, the alliance mechanics and strategic depth provide engaging gameplay for those invested in collaborative survival. The freemium model supports optional purchases for boosts, but core enjoyment doesn't hinge on spending, making it accessible for casual and dedicated players alike.