I have developed the app "Stealth Audio Player". It is on Google Play Store. It has reached more than 58,000 organic downloads, and has reached top charts of several countries.
Several YouTubers have recommended it and articles have been published on several sites including xda (see screenshot).
I need an investor who can advertise and promote my app, and when the revenue starts to come, I will share 50% of it with the investor. We can enter into a contract to secure our interests. Bid any amount you like and I will contact you. If we have a deal I will make a new project according to our requirements.