How does it cost?
We've done a fair price. You can create your app for free, you'll just have to pay the creation cost when you want to publish your app. The creation cost is 120€. It is a one time fee, not charged every month or year, only at the moment you think your app is ok and you want to publish it. Then there are hosting costs of 5€/month, no engagement, you can stop it whenever you want.