@Iliana Oudom, congrats! How exciting to get your first property. Let the wealth fun start!
There are several ways to go about apps. There's professional software and then landlord software, which sounds like your preference.
Some tidbits:
Cost: There's generally two types: transactional vs. monthly membership. For one unit, I'd look at the transactional types.
User Limits: With landlord software, it's generally capped at 1. And you should never share access to your account because it connects to your bank. However, if you have a partner or use somebody to help manage (i.e. co-manage) then this would need to be determined before selecting which platform.
Features: Apps are generally built with the same core 3rd party apps for rent payments, screening reports, etc. The user experience may be the biggest difference but some offer more accounting power. Users either love or hate that extra accounting power, some say it complicates the experience and not needed.
Peer Apps: Your tenants will prefer Venmo or Zelle; vast majority do. It's easiest for them. Stick to your guns and require them to use your desired landlord software for payments. Venmo/Zelle don't know what rent is, just what payments are. Compared to landlord software which does know what is rent, when it's due, if/when to add late fees, if/when to send automatic email reminders, etc.
As you see, I'm a nerd about this stuff. Happy to answer any questions!