Monster Trainer: Idle RPG

This idle RPG features a cute, simple art style and is playable in short, easily interruptible sessions, making it suitable for quick play on the go. While progression is idle and generally fair, many desirable benefits and event prizes are locked behind significant paywalls, pushing it towards a pay-to-win model. It's best suited for players who enjoy casual progression and don't mind the monetization, or those looking for a low-demand game to pass the time.