What is the difference between Android TV and smart TV?

Related questions

1. Which smart TV uses Android?
2. Is there a charge for watching on demand?
3. What does it mean to watch something on demand?
4. Can I watch HD channels on a regular TV?
5. What are the free channels on TV?
6. Is ITV hub free?
7. What are the benefits of Android TV?
8. Can you watch Freeview through WIFI?
9. How do I get subtitles on Freeview?
10. What does SBS channel mean?

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16. #smart
17. #counterparts