[tusharmath]

Yes, that is the best time to build a GraphQL API. It will save you many hours later. Like it or not, eventually if you are building a mobile app, you will move to GraphQL eventually. It's a massive pain to do it when you have everything running. GraphQL will save you from embarrassing errors on the client and improve performance for sure. My recommendation is — Build API and expose them using REST or GRPC. Use a solution like https://tailcall.run/ to create a GraphQL facade on top of it for your clients to consume.

[GiorgioG]

At least put a disclaimer that it's YOUR SaaS you're recommending.

[tusharmath]

It's open source and free. Use it if you like what it offers.

Disclaimer: I am not promoting it, I am just stating facts :)

[GiorgioG]

Which facts are you stating? Nothing but opinions and promoting your own solution.