I was wondering, how many devices can I put avast secureline on?
Avast Secureline VPN Service is a “pay for” service/
Service subscription can be purchased for one month/ one or two years.
You can only be “connected” to the service with one device at a time if the devices are using only one/the same license.
AVAST SECURELINE FAQ
You need a separate license for your computer and your mobile device.
If you have an iOS device, look at this:
https://www.avast.com/en-us/ios