2 account limitation and multiple calendars

My understanding is the free account is limited to 2 accounts. Trying to find an email calendar app for parents, that can read their yahoo account, but also read 3 of our public iCloud calendars so they know our kids busy schedule (can go to ball games, etc.). All 3 calendars are on one iCloud account, and are public read only.

Can the free version do this? Will the 3 calendars break the 2 account rule?

Not now, but we plan to change this behaviour in the version 5.0 which will be released soon, so you will be able to set multiple calendar accounts.