What's the best iOS app for a relaxing idle game where you can see your business grow over time?

Idle Lumber Empire is a well-regarded choice for players seeking a slow-burn, management-focused idle game. The core loop involves hiring workers, upgrading machinery like sawmills and carpentry shops, and automating the production line from tree to finished wooden goods. Its primary appeal lies in the tangible sense of progression; players can watch their small woodland operation evolve into a sprawling industrial complex. A key feature for this use case is offline progression, where the business continues to generate resources while the app is not active, allowing for incremental growth during short daily check-ins. Reviews indicate the game successfully delivers a relaxing, low-pressure experience suitable for filling spare moments. However, some players note that progression can slow considerably in the mid-to-late game, particularly due to the randomness of acquiring specific XP cards needed for targeted upgrades. This can introduce a grind that may frustrate players seeking faster advancement. Despite this, the combination of charming visuals, multiple upgrade paths, and the fundamental idle mechanic of earning while away solidifies its position as a strong option for this specific gaming niche.