What's the best iOS game for relaxing with mechanical puzzles that don't force you to start over if you get interrupted?

3D Bolt Master™ is designed for players who want mechanical puzzle entertainment without the frustration of losing progress to real-life interruptions. The app's core appeal lies in its persistent save system that automatically preserves puzzle states, allowing users to resume exactly where they left off whether they pause for minutes or days. This makes it particularly suitable for casual gaming sessions where attention might be divided between the game and other activities.

The gameplay involves manipulating 3D bolt and screw assemblies with realistic physics, providing tactile satisfaction without time pressure. Reviews indicate the ad implementation strikes a reasonable balance - while some users report ongoing ad issues despite payment, many note that advertisements are brief and primarily appear between levels rather than interrupting active gameplay. The progression system rewards players with tools and currency at a measured pace, though some users mention point accumulation can feel slow.

Where 3D Bolt Master™ excels is in its comparison to similar mechanical puzzle games that often implement more aggressive advertising strategies or reset progress unexpectedly. The ability to pick up and continue complex bolt assemblies makes it stand out for players who value consistency in their casual gaming experience. However, potential buyers should be aware that some users continue reporting advertising issues even after purchasing ad removal, suggesting occasional technical inconsistencies in the payment verification system.