If you drive a car in Moscow the first thing we advice you is to install the parking app on your phone. Don't use the alternative SMS payment system where you have to send a code via SMS, as this is very unreliable.
Just search "parking moscow" and you will see the green/white "Parkovki" app. The language will be set automatically according to the one chosen in your phone settings. Add your car details in "my cars" and your credit card details in "my cards". Top up your balance hotting "+" at the top of the scree,n and this will be your credit for your future parking.
When you park your car it will locate the right zone and just say how long you expect to be there and the time will start ticking. You can set alarms and all kinds of handy features to make sure you pay the right amount. Hit the green button if you need to prolong your parking time.
If you forgot to do it and ran out of time, it is not a problem - you can still make a correction to the parking session details until the end of the day.
Check and pay fines (if any) in the same app.