Nobody warns vibe coders about this part. You can ship an app in a weekend. You can also break 6 laws in that same weekend without knowing it. Here's what to check before you launch: 1.) Kids If signup doesn't ask for age and a child under 13 joins, COPPA fines can reach $53K per child. 2.) Fonts Loading Google Fonts from Google's servers sends visitor IPs to Google. A Munich court ordered a site to pay one visitor €100 for this under GDPR. 3.) Session replay Recording what users type without consent can count as wiretapping under California's CIPA, at up to $5K per violation. 4.) Launch emails No unsubscribe link or postal address breaks CAN-SPAM, at up to $53K per email. 5.) Subscriptions If renewal terms aren't right next to the button, California can treat renewals as unconditional gifts you have to refund. 6.) User uploads Without a registered DMCA agent, which costs $6, you lose safe harbor. Statutory damages can reach $150K per willfully infringed work. None of these cost much to fix. All of them cost a lot to ignore. Paste this into Claude before launch: "Check my app for: missing age gate, externally loaded fonts, session replay without consent, marketing emails without unsubscribe and address, renewal terms not beside the subscribe button and no DMCA agent. Fix what you can and list what I need to do myself." Not legal advice. Talk to a lawyer for your situation.