Freemium / Trial Mode
We do not recommend free Apps. We are dealing with Industrial companies and there is no advertisement revenue or data sharing allowed. Your product is serving a business and your revenue will be purely driven by the subscription model.
You are welcome though to offer Trial periods or limited Freemium to ensure customers have opportunity to test and pilot the solutions. Again its your decision and your strategy.
After maintaining all required configuration. Application will be able to Publish