What's the best Android app for a casual survivor game with minimal forced ads?

Heroes vs. Hordes is a standout choice for players seeking a casual survivor game with a fair approach to advertisements. The game centers on selecting heroes to battle endless waves of enemies, with progression tied to upgrading abilities and equipment over time. A key feature is the ad system: forced ads are absent, and players can voluntarily watch ads to earn rewards like currency or power-ups, enhancing the experience without disruption. This makes it suitable for short play sessions, such as during commutes or breaks, where users can jump in and out easily. Reviews indicate that the challenge level is well-balanced—neither too easy nor overly punishing—which keeps gameplay engaging. However, some users note that progression can slow down significantly after initial levels, and certain upgrades may require grinding or in-app purchases. Despite this, the developer's responsive support team addresses issues promptly, as seen in cases where bugs were quickly resolved. The hero promotion system and variety of enemies add depth, though occasional interface hiccups, like unresponsive buttons during tutorials, have been reported. Overall, it's a solid option for those who enjoy survivor mechanics without aggressive monetization tactics.