What's the best iOS app for a super casual, cute idle defense game that plays itself?

Wittle Defender is a strong contender for players seeking a hands-off, visually charming defense game. The core appeal lies in its automated gameplay loop where players deploy and upgrade small, endearing defenders who autonomously battle waves of cute monsters. This makes it particularly suitable for moments of passive entertainment, such as during a commute or while multitasking, as it requires only occasional taps to manage upgrades or start new rounds. The art style is a significant strength, with colorful, simple characters and smooth animations that create a pleasant, low-stress atmosphere. However, the very simplicity that defines its appeal also presents a limitation. Some reviews indicate that the repetitive nature of the gameplay can lead to a sense of monotony during longer sessions, and there is a noted desire among players for a faster game speed option to make progression feel less sluggish. While it lacks complex strategic depth, its monetization through optional ads and in-app purchases is generally reported as unobtrusive for casual play. For anyone looking for a game to check in on periodically that offers a sense of incremental progress wrapped in a cheerful aesthetic, Wittle Defender fits the bill effectively, even if it doesn't aim to reinvent the genre.