Hi Josef!
All Lightship services, as well as VPS, are free as long as your app has less than 50,000 monthly active users (MAU). Should your app exceed 50,000 MAU, we ask that you reach out to us so we can discuss how we can best support your app. For more information about data caps or how monthly active users are calculated, please visit our website at: https://lightship.dev/products/pricing?hl=en.
Kind regards,
Maverick L.