An account is how Rosaria remembers you from one device to the next. It is free, it needs only an email address, and it carries the parts of the app that are kept rather than only shown.
Sign in on a second device and all of it is already there. The account is the thread that holds those parts together; there is nothing else to set up.
Praying the Rosary with the written text, the order of which is on the how to pray the Rosary page, needs no account. Neither does reading the whole Douay-Rheims Bible, the day's mysteries, the liturgical calendar or the daily readings. All of it works signed out, exactly as before. The account adds the parts that are kept; it takes nothing away from the rest.
Sign in once with an email address, and the app stays signed in on that device until you sign out. A guest is always welcome: the parts that need an account ask for one, and the rest of Rosaria works as it did. Nothing is required to begin.
Nothing. The account is free, there is no subscription, no advertising and nothing to buy. Rosaria is a small tool for prayer, and the account exists only to carry your own settings and your own reading between your own devices.
The account keeps the things listed above, and little else. There is no feed and nothing is sold on. The privacy policy, reachable from the app's own Settings screen, names what is stored and why, in plain words.
No. You can pray and read without one for as long as you like. An account is for keeping your streak, your settings and the parts that are saved.
An email address. There is no password to invent and no card of any kind.
Yes. That is the point of the account. Sign in on both and the streak, the settings and the saved passages travel with you.
One free account carries your streak, your settings, the spoken Rosary, your Bible groups and your saved verses from device to device. Praying and reading need no account at all.