Free Builds Playbook: Ship Android Apps on $0 CI

Build, test, sign and publish Android apps without paying for build minutes, keep your code private, and get updates onto every phone automatically.

• The public-builder / private-code setup, step by step
• The version-number trap that silently breaks updates, and the fix
• Your own auto-updating app library and permanent signing keys
• 5 ready-to-edit workflow templates

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