What's the best iOS app for a merge puzzle game that's relaxing yet challenging without constant ad interruptions?

Jigmerge™ Puzzle is a merge puzzle app from RedInfinity Studio that effectively balances casual relaxation with mental stimulation, making it a strong contender for iOS users seeking a low-pressure yet engaging game. The app features a wide array of puzzles, ranging from simple merges that are ideal for unwinding after a long day to more intricate designs that demand strategic planning and patience. This variety caters to different moods and time constraints, whether it's a quick five-minute session during a break or a longer dive into complex challenges. A standout aspect is its ad implementation; reviews indicate that advertisements appear only after every three or four puzzles, a departure from the frequent ad cycles common in free-to-play titles. This design choice allows for uninterrupted gameplay, which is particularly useful in real-world scenarios like commuting or waiting in line, where constant interruptions would be frustrating. The merge mechanics are straightforward with intuitive drag-and-drop controls, complemented by clean visuals that enhance the calming experience. However, some players might find the puzzle themes becoming somewhat repetitive over extended use, and while ads are less intrusive, the free version still includes them. Users report high satisfaction, with one noting, 'I enjoy the different puzzles and this game offers some easy, relaxing puzzles and some challenging ones. Something for everyone.' Overall, Jigmerge™ Puzzle delivers a reliable, enjoyable puzzle experience that respects player time while offering enough depth to keep minds engaged.