Seven transparent tools · Reviewed September 19, 2026
Fell & Sell Tools & Calculators
Record real shop outcomes, compare deconstruction value or plan an upgrade. Enter your observations and inspect every assumption; none of these tools claims access to hidden game formulas.
Ver. 1.4.3 baseline + September 18 public update
Profit calculator
Model revenue, sell-through, gross profit, inventory left behind, and break-even units using only the costs and prices you enter.
Open tool 02Inventory decisionSell or keep
Balance cash pressure, crafting need, equipment value, replacement difficulty, duplicates, and uncertainty in one transparent score.
Open tool 03Go-or-bank checkDungeon risk planner
Combine health, healing, haul value, biome depth, route confidence, and exit knowledge into a conservative run checkpoint.
Open tool 04Floor allocationShop layout planner
Translate commercial, storage, comfort, combat, and movement priorities into a 100-point floor-plan brief and first action.
Open tool 05Your observed pricesPrice test log
Record sold and refused prices locally, keeping item, build and shop context separate. See observed bands and sample limits.
Open tool 06Materials versus goldDeconstruct or sell
Compare the item’s sale value with quantities and material values you enter, while keeping personal crafting need visible.
Open tool 07Sessions to pay backShop upgrade ROI
Estimate upgrade payback from your cost and extra profit per session, then compare lower and higher lift scenarios.
Open toolBuilt for honest uncertainty
These tools turn player-entered values into arithmetic or visible editorial weights. Unknown drop rates, customer coefficients, item prices, and hidden stats are never supplied behind the scenes.