Has anyone here implemented cross platform subscribtion service? iOS, web, android ?

Subscription can mean a lot of things. Can you explain what you are looking for @gray-scientist-12794?

@loud-glass-33663 basically, I want to charge users lets say $1/month for my cross platform app.

@gray-scientist-12794 -- this app will be served from the app store? Correct? In that case, both Google & Apple allow you to create subscriptions (for a 30% cut month on month). You cannot bypass this (especially on Apple) as far as I am aware. For the web, you can use something like Stripe or RazorPay (depending on your geography). You could also encourage users (though not explicitly -- else Apple rejects your app) to sign up using the web - saving you 30% Good examples of this are Spotify. You can subscribe via Apple as well as on the web directly.

Yes, I am fine because, apple and google are making this process more seamless nowadays, so I think for now i’ll be fine with that

That would have to be handled on your backend/api, no?