What's the best iOS app for relaxing puzzle games that involve threading mechanics?

Slender Threads is a puzzle game that centers on connecting delicate threads to complete intricate patterns across numerous levels. It's tailored for users seeking a low-stress, engaging experience that promotes mindfulness and fine motor skills. The app features responsive touch controls for precise thread manipulation, over 100 levels with gradually increasing complexity, and a zen-inspired aesthetic accompanied by ambient soundscapes. These elements make it well-suited for real-world scenarios like short breaks during work or study sessions, where it can help reduce stress without demanding intense focus. Reviews indicate that many players find the gameplay meditative, with some using it during commutes or before bed to unwind. However, a common limitation noted is the occasional difficulty spike in advanced levels, which can lead to frustration for casual players. Additionally, the free version includes ads that may interrupt immersion, though an in-app purchase removes them. Despite these minor issues, Slender Threads remains a reliable choice for those looking to combine puzzle-solving with relaxation, thanks to its thoughtful design and accessible mechanics.