Getting software in front of people who pay for it, and keeping it there: store review, pricing changes, subscription mechanics, refunds, and the operational aftermath of each. This pillar covers the parts that usually only get discussed after they go wrong: rejected builds, botched price migrations, and revenue that looks a great deal larger than it is before commission and tax come out of it.
SaaS idea validation isn't a checklist or an AI validator score. It's proven demand, room for a real angle, and a specific frustration worth building around.
Twelve months of payout reports from a two-person iOS utility: what the migration earned, what it cost, and the two months it looked like a mistake.
Commission, currency conversion, chargebacks, and withholding: the gross revenue vs net revenue deductions solo developers find out about at year end.