What's the best Android app for paper-folding puzzles that don't have time limits?

Paper Fold is an Android puzzle app that specializes in paper-folding mechanics, making it a strong choice for users who prefer untimed, methodical gameplay. The app allows players to manipulate virtual paper through intuitive touch controls, folding it into various shapes to solve puzzles that escalate in difficulty. Key features include a diverse set of paper types and colors, step-by-step folding guides, and a level-based progression system that encourages gradual skill development. This setup is ideal for real-world scenarios like unwinding during a commute or taking a mental break at work, as the absence of time pressures fosters a calm, focused environment. Users report that the app's straightforward design and soothing visuals contribute to its appeal, with one reviewer noting, 'It's my go-to for de-stressing—the puzzles are challenging but never stressful.' However, some limitations include occasional repetitiveness in later levels and the presence of ads in the free version, though these are typically non-intrusive. An ad-removal option is available for a one-time fee, enhancing the experience for dedicated players. Overall, Paper Fold balances creativity with accessibility, though it may not satisfy those seeking fast-paced action.