Calculators and reference tables that answer one question each. Every tool carries the date its underlying data was last verified against the primary source.
A filterable table of App Store and Google Play guideline numbers with the rejection language commonly quoted against each, a plain-language cause, and a link to the current guideline text. Checked against the published guidelines periodically.
Enter gross monthly revenue, pick a platform and a tax jurisdiction, and see commission and estimated income tax separated out line by line, with the published commission tiers and a stated effective tax rate per jurisdiction.
Tools are listed here only once they work. Planned tools are not given placeholder pages, and articles do not link to a tool before it exists.