Hey @Talal, another developer asked a very similar question a few months back and there’s some good discussion in that thread here: Launched new app how can i find customers.
Our guide on marketing your app covers organic strategies that are well suited to a small budget.
The go-to-market success guide is a good complement for the higher-level picture, and Built for Shopify is worth aiming for as a longer-term visibility play once you hit 50+ net installs and 5+ reviews. On the ad cost side, our advertising FAQ breaks down minimum budgets and bid mechanics so you can see whether there’s a lower-spend approach worth trying.
You may also want to check out some of our marketing courses in the Shopify academy. These are tailored to merchants, but the lessons can apply to marketing apps as well.
Hope that helps.