What's the best Android app for an idle game with offline progress and upgrade mechanics?

Carve Quest is an Android idle game that specializes in incremental progression and offline accessibility, making it a strong contender for players seeking a low-maintenance gaming experience. The core gameplay revolves around carving spheres to collect resources like Metal orbs and upgrading gear across multiple levels. Its offline functionality allows users to advance without an internet connection, which is ideal for commutes or areas with spotty data. The ad reward system provides optional boosts for watching videos, addressing the grind without mandatory purchases. However, users report that upgrade animations can lag after consecutive taps, slowing down progression, and the gear system currently maxes out at level 50, leading to repetitive end-game content. Despite these limitations, the game's straightforward mechanics and consistent offline performance cater well to casual players who enjoy gradual, hands-off advancement. Reviews indicate that while waiting times can be noticeable, the ability to play without connectivity and the satisfying loop of resource accumulation keep engagement high.