How do you promote your apps or projects?

The #showdev tag is one option in this community, but it really depends on what you're doing, and you still need to give people a reason for reading (perhaps talking about the building process)

I think the general plan should be to gradually build up a userbase and gain users through word of mouth—even if the process is really slow early on. I've learned that "launches" are a fools errand. Ongoing continuous improvements you can point to have had a much better result on my projects. It takes a lot of patience and self-awareness.

I've had some success with Product Hunt and sharing on Twitter. Hacker News is also a good place but again, hit or a miss.

I have learned that going long term is sometimes the best solution over trying to crack it ones. Keep writing about it, the problems it solves and you should see good results soon (of course, some trial and error will be needed. But once you know what works for your audience, it more of a question of refining the approach)

The application market now has billions of diverse applications. And it is very important that there is a correct and effective approach to this matter. I can advise the app-promotion service. They work with Android and iOS operating systems. They use a variety of services to optimize the application store.
They promote Android and iOS applications according to your wishes and possibilities. If you do not have a lot of funds at the initial stage - this is not a problem. They have many services that will suit you depending on your capabilities and desires. Thanks to their advertising approaches, you can see the result in a few days.