The best #tools are the original tools that come with the social network itself:
Instagram app for Instagram Twitter app for twitter Facebook app for Facebook Frankly saying, other tools are too general and won’t address a specific product that YOU are building. Therefore, you should search by yourself, via hashtags that are suitable for your products, and see which Influencers get the best engagement, which ones have a real cult of followers that would be interested in your product or brand.
Good luck brand and Influencer heroes! – #DearMishuDad (Influencer contract template is here: https://www.amazon.com/dp/B084SP1R7G)