What does it cost to turn a spreadsheet into an app?
With PaprPlain it is ₹599$7 a month for one person, ₹1,999$22 for a business of up to ten, and ₹5,999$64 with nobody counted at all — and that is for the whole business rather than per head. Every plan is the same complete product; the bigger ones simply let more people in. There is no separate build fee: you send the file, it comes back as a working workspace, and that setup is included. Seven days are free to start, and there is no card form anywhere in the product.
Why not per person
Paying per head quietly stops you adding the counter staff. Put everybody on it. Seven days free, then a call with your own file. See the plans.