Use current inputs
This page is a written budget worksheet. Use your current cash balance, a reserve you choose, and the price shown in the live shop. The interactive decision tool is available from Tools in the navigation.
Spendable cash = max(0, cash − reserve). If the shop price is greater than zero, the affordable purchase count is floor(spendable cash ÷ price). Remaining spendable cash = spendable cash − count × price. These are ordinary budget formulas, not game reward formulas.
Keep the estimate meaningful
- Use values in the same currency.
- Use a nonnegative reserve and a strictly positive price.
- For one drill purchase, compare spendable cash with its actual price rather than assuming repeat purchases.
- Recheck after a purchase or price change; do not add hypothetical offline income to the current balance.
Choose a useful purchase
Upgrade decision tool
Filter by the part of the egg-to-Farm loop holding you back.
Open the toolDrill purchase guide
Read the shop's cost and effect, then test the same digging task.
Compare drill upgrades