Summary of ChatGPT's Anwer:
To run your application for 20 hours a day for free:
- Heroku: Free tier sleeps after inactivity, with 550 hours/month. You'll need to manage uptime carefully.
- Glitch: Free tier sleeps after 5 minutes of inactivity but can be kept running with external pings.
- Repl.it: Allows continuous execution within free resource limits.
- GitHub Codespaces: Suitable for small tasks, but limited free usage, designed more for development.
- Google Cloud Platform (GCP): Free tier includes a small VM (f1-micro), good for continuous low-computation tasks.
- AWS Free Tier: EC2 micro instance can run continuously, but track usage to avoid charges.
Best options for continuous uptime: AWS or GCP. For lightweight apps: Glitch or Repl.it.