What's the best iOS game for quick, relaxing sessions that gradually increase in difficulty?

Treasure Masters is an iOS arcade game that strikes a fine balance between casual relaxation and incremental challenge, making it well-suited for unwinding during brief downtime. The core gameplay involves tapping to launch weapons like swords or spears at targets, with mechanics that are easy to grasp but deepen as players progress. Its audio design, including a calming soundtrack and satisfying sound effects, contributes to a low-stress atmosphere that users frequently praise for its ability to ease tension. Reviews indicate that the progressive difficulty keeps sessions from becoming monotonous, rewarding longer playtimes with in-game incentives that encourage replayability. However, some users report occasional performance hiccups, such as lag during critical actions like weapon throws, which can disrupt flow in longer runs. Despite this, the app's simple loop and accessible design make it a reliable pick for those seeking entertainment that doesn't demand intense focus. It's particularly effective for filling short gaps in a day, like waiting in line or during commutes, where its blend of simplicity and rising stakes holds attention without causing frustration.