Sort planets by (Ore demand - Ore supply) / Ore supply to see which planet to upgrade next.
This is the most critical tab for early-to-mid-game players. It calculates the "payback period" for upgrading a planet's mining, cargo, or speed levels. idle planet miner spreadsheet
While the Mastersheet is a powerhouse, your strategy should shift as you progress: Sort planets by (Ore demand - Ore supply)
The most famous community tool is the (originally by Kaphor). It serves as a comprehensive "walkthrough" for early to mid-game players. idle planet miner spreadsheet