Growth tips for a bootstrapped tech startup (mobile app)

Hello everyone,

I'm new here... I'm the Founder of Contapp, a bootstrapped tech startup which innovates the way we digitally manage & use business cards, whilst reducing paper waste globally.

As a Solopreneur, I need to wear many hats. I completely believe in the product and our branding/marketing is great, but growth can be a challenge as we do not have £1m to blow. Our genuine app store reviews also speak volumes.

Does anyone have any tips for me to drive downloads for my mobile app?

For extra info, feel free to check out the app for free here: http://onelink.to/-contapp