Three-Rod Depth Practice — Paid practice app for the three-rod depth test. Three rods in a white peephole: sides fixed, center moves nearer↔farther by thickness/color (no sideways motion). Exam 5 cm/s, practice 2.5 cm/s. Pass if 3-trial average ≤ 2 cm. History, graph, CSV, JA/EN. No ads or IAP. No network. Practice only—does not guarantee official results.
Doujin Print Profit — Estimate break-even and sold-out profit for doujin/zine print runs, event costs, and carryover stock. Not a POS/register. Not affiliated with any printer or event.
Booth Break-even — Enter booth fee, travel, supplies and card fees to see how many units you need to break even or reach a profit goal.
Handmade Profit Fee Calculator — Take-home after fees across marketplaces (minne, Creema, and more). Reverse-price from a goal. Sources shown. Not affiliated with any marketplace.