What's the best iOS app for a challenging strategy game with kingdom management and offline play?

Thronefall is a strategic kingdom-defense game for iOS that excels in blending tactical depth with accessible gameplay. Its core mechanics involve building and fortifying a small kingdom during daytime phases, then defending it from waves of enemies at night. This cycle requires careful resource management and pre-planning, appealing to players who enjoy thoughtful strategy without overwhelming complexity. Specific features like the mutation system introduce randomized modifiers that enhance replayability by altering gameplay conditions in each session. The artwork is consistently praised for its clean, charming visual style, which complements the game's elegant design. Importantly, Thronefall supports full offline play, allowing users to engage in sessions during commutes or in areas with poor connectivity—a practical benefit for mobile gaming. User reviews indicate high satisfaction with the game's polish and value, noting the free trial as a helpful way to test before the one-time purchase. However, some players report occasional progression bugs or steep difficulty spikes in later levels, which can frustrate those seeking a smoother experience. Despite these minor imperfections, the game's combination of strategic depth, offline capability, and fair pricing makes it a standout choice for fans of mobile strategy titles.