Earlier quoted context omitted.
That's not true at all. It's really easy to build an MVP that complies with GDPR.
Regardless of whether the app has a cost in and of itself, the process of appointing a compliance officer and making sure that they understand their responsibilities under EU law is a necessary cost unless you happen to be developing the app yourself and already understand everything involved.
https://gdpr-info.eu/art-27-gdpr/ / https://gdpr-info.eu/art-37-gdpr/