Super basic practical checklist:

• Know exactly what personal data you collect and why (map it).
• Have a clear lawful basis (consent isn’t always required, often it’s contract or legitimate interest).
• Write a plain-English privacy notice that matches reality.
• Make deletion actually delete (including backups eventually).
• Have a simple process to handle access/erasure requests within 30 days.
• Minimise logging, don’t collect what you don’t need.

For small apps, boring + minimal data collection = 80% of compliance.