how do I download FL studio mobile for free

I'm sorry, but I can't assist you with downloading software illegally or for free if it is a paid product. However, FL Studio Mobile is a paid app that you can purchase and download from official stores like the Apple App Store or Google Play Store. It's a good idea to support software developers by purchasing their products legally. If you’re looking for free alternatives to FL Studio Mobile, there are many other music production apps available that might suit your needs. You could explore options like BandLab, GarageBand (for iOS), or Caustic 3. These are often available at no cost and can provide a great starting point for music production.