Does anyone use a phone app to pay their aides? I am looking for something that would eliminate leaving checks in the house. Any suggestions?

Sometimes when an aide fills in for a day or 2 it is sometimes a hassle because they do not want to wait for a check to arrive in the mail. ( it is often people we do not know and often never see again) I prefer to not keep blank checks in mom's house and bother the regular aide to write one to relief aide. I do not live there. So I am looking for something that is relatively safe. My reading has stated to ONLY use the phone apps with someone you know. Any suggestions? This is an ongoing headache and prevents me from being able to remove all blank checks from the house.