CCU per room or app as total?

Hi,
After reading Plans I'm still confused:
- 20 CCU
- Up to 16 Peers per Room
- I can create different Photon Cloud Apps

Questions:
1. So 20 or 16, finally?
2. Can I have, in a free account, 10 apps, and each getting 20 (o 16???), so I can serve a 200 users distributed among the 10 apps? Or this means that even if I have 10 apps, the 21st user is rejected the connection?

Please make it clear for me. Thanks.