It depends on what you mean by the word "developer".
Yes, I created that app by myself as well as other Bitcoin LN enabled apps like www.qfg.io . But I don't write code, I use APIs, no-code platforms and the likes to bring them to life.
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What no code platforms do you recommend?
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It depends a lot on your app needs. Best one for me is Bubble, super powerful. Just they still don't have native mobile app export. But they will eventually.
Adalo for mobile apps, and also way easier to learn.
I teach how to create this bitcoin LN enabled apps, and also can do dev work if anyone needs.
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