Yes, the Fido App is free to download and use. You must not pay money to any individual to register a Fido Account or use Fido services. Any charges linked with receiving a Fido loan will be shown to you in the Fido App.
You can download and install the app from the Google Play store or the App Store using this link: https://fido.onelink.me/mXlc/e87sbaei