This app was mentioned in 4 comments, with an average of 1.00 upvote
pickcrafter I think
PickCrafter - Idle Craft Game | 4.4 rating | Free with IAP | 10,000,000+ downloads | Search manually
> Mine gems, collect Pickaxes and discover treasure filled Biomes in PickCrafter! PickCrafter is an incremental idle craft clicker game that lets you take control of a pickaxe and dig deep into the biomes 💎 Even while ...
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I really enjoy PickCrafter. It is also available on iOS and Amazon.