What's the best Android app for tower defense with a wide variety of upgradeable towers and strategic depth?

Battle Strategy is a tower defense game that excels in offering a broad selection of upgradeable towers and deep strategic elements. Players can access various towers, such as archer, cannon, and mage types, each with distinct abilities and upgrade trees. This variety allows for tailored defense setups, like using slow towers to control enemy movement while deploying high-damage units for elimination. In real-world scenarios, users might face waves of diverse enemies, requiring adaptive strategies—for instance, combining area-of-effect towers with single-target specialists to handle mixed threats. Reviews indicate that the strategic depth, coupled with multiple game modes like campaign and survival, provides lasting appeal without feeling repetitive. However, some users report that certain levels can be punishing if strategies aren't optimized, which might deter casual players. The app's balance between tower diversity and tactical planning is a standout, though occasional performance hiccups on lower-end devices have been noted. Regular updates from Zygle Games address bugs and add content, reinforcing its value for strategy enthusiasts seeking a customizable and challenging experience.