i want to create a service that periodically logs in to a 3rd party service to check if anything has changed in their account, then send a message via firebase to notify the user who's account has been changed.

can you recommend any program/hosting/server that would be ideal for this?

i prefer dart (because i built the frontend in flutter, but i'd use most any language).

i'd prefer not to pay for a dedicated server because of price, so if i could just create processes that run every hour or so, that would be ideal.