Is there a good Android app for a free-to-play WWII strategy game with global multiplayer?

Supremacy is a detailed real-time strategy game set in a World War II alternate history. The app is a strong choice for players seeking a free-to-play, historically themed grand strategy experience against a global player base. Its core gameplay revolves around managing a nation's economy, diplomacy, research, and military forces across a large map, with matches that can unfold over days or weeks. Specific features include a complex resource system requiring management of oil, metal, and rare materials, and a deep alliance system where players must coordinate offensives, share intelligence, and negotiate treaties to survive. Real-world scenarios involve planning multi-front campaigns, timing invasions with alliance members, and managing espionage operations against rival coalitions.

However, the game's long-term engagement has a notable caveat. While entirely playable without spending, user feedback consistently indicates that the in-game economy of 'gold' and card-based unit upgrades can create an imbalance between free and paying players in late-game stages. Some reviews describe scenarios where weeks of strategic effort in a match can be undermined by opponents who purchase significant power boosts. The interface, while information-dense, can feel slightly cluttered on smaller phone screens. For a free player focused on careful planning and coalition-building, Supremacy offers a substantial and demanding strategy experience, but its monetization model is a significant factor in its endgame dynamics.