Both of my apps, Tiny Piano & Tiny Guitar, use the same business model. Free + Ads, then IAP to remove ads and unlock more content. It works great for indie dev

Both of my apps, Tiny Piano & Tiny Guitar, use the same business model. Free + Ads, then IAP to remove ads and unlock more content. It works great for indie developers because I don't have a big marketing budget to convince a user to spend $0.99 on my app before they've even tried it.