Is there any option to access infinityfree database in android app using API or any other way

[ChrisPAR]

Unfortunately, nope:

Connecting to MySQL from an external application

Sometimes, you may want to connect to your MySQL database on your free hosting account using external software, like a desktop database manager (like MySQL Workbench) or an external program you wrote yourself (like an Android or iOS app). You cannot connect to a free hosting MySQL database from outside your hosting account. You can only interact with your free hosting database through PHP scripts uploaded to your free hosting account, or through our phpMyAdmin installation. The ability to con…