To develop a product, the charge is based on the function of the product. The more complicated, the more expensive. After all, the development time is long and the cost is high. Generally, it is just a small demonstration program, which should be within several thousand dollars, involving catering or e-commerce, which is more than ten thousand dollars. Hundreds of thousands, really.
Here, by the way, the components of small programs will give users who want to do small programs a little psychological bottom. There are two ways to develop small programs:
The first one is purely static, that is, it does not involve back-end data storage and interaction. To put it simply, what can't be changed after the page is written is the static page, which is relatively simple and inexpensive.
The second is dynamic, with a background, which can publish and modify information. The back-end data storage and calculation are more complicated, and all the charges are of course more expensive, because it involves later updating and maintenance, which requires money.
To sum up, when looking for a company to develop a small program, it should be noted that it is necessary to first find out whether the function you want to do is complicated, and then look at the developer's answer. If your function is complex and needs to be customized, but the charge is very small, most of you are a liar.