I haven't used social media influencers to promote an app specifically, but I know and have worked with different influencers in the past. You're greatest ROI w

I haven't used social media influencers to promote an app specifically, but I know and have worked with different influencers in the past. You're greatest ROI will most likely come from influencers that reach the specific demographic you are targeting, or one that is very similar. If you want to go this route, make sure to work with people who can show you clear metrics of their influence - I think it goes without saying, but many people with a massive amount of followers have purchased a lot of them to look more influential than than they are. A huge following with very low engagement is worthless. Anyone worth working with should be keeping track of metrics already. I would also recommend working with influencers who are personally excited about your product. I think it comes through (unless they are crazy-good at copywriting) when influencers promote stuff just because they are being paid vs when they genuinely love the product.