How to get a grant for an application?

Question

Android

Good afternoon. there is a project, the idea is fire, the application is already at the final stage of development, there is even a website. But we spent almost the entire budget on a quality product, now we are thinking about how to promote it, we need money for advertising and exhibitions, we don’t have such money at the moment, we came to the idea that we need a grant for innovative business solutions. Maybe there are permanent state or some company funds? Or maybe ideas where to get money for promotion? We thought about attracting investors, but we are afraid that we will have to give away too much.

UPD: An application for the hotel and restaurant business, there are already customers, a client flow too, the relevance of the project is confirmed by software dealers. The problem is that we want to develop faster, due to a full-scale advertising campaign and an increase in staff. We also need integration with various automation systems, the development of many additional modules, Libra alone has $5,000 certification. In this regard, it is necessary to attract funding

UPD2: I will be glad if you share your experience and links to international and Russian grant platforms. I will also be grateful to those who will give advice on working with investors and links to platforms where you can look for investors

Answer 1

https://www.iidf.ru/
but in general now you are saying something like this: you did it beautifully and, as it seems to us, it is useful to someone
, but most likely it only seems to you

Answer 2

How is it that the application "fire" at the final stage of development does not have a single paid client?
Or is it just that you don't need it?

Answer 3

Take an investor and that’s all, if you have four users in the application, at the moment you will give the investor two users, this is very little