Can I build a Shopify app without a developer?
Yes. Either a no-code app builder, where you assemble it yourself and pay monthly, or a done-for-you studio like TicApp, where the app is built for you and you approve the design. Neither needs you to write code.
The real question is not whether you can, but who does the work when something is wrong. A no-code tool hands you a support ticket. A studio hands you a person.
You can see what the done-for-you route produces before speaking to anybody — the builder on this site assembles a working sketch from the sections we have already shipped.