I have launched A4Pad - over 12k downloads - feedback?

Hi! I have created a tool that I needed on my iPad. Somehow, the tool went viral and got over 12k downloads and positive feedback. However, I am not able to monetise- I guess I am very bad at communicating the product value. It’s not a competitor of the major productivity apps but cover averages users needs. A4pad is your digital A4 notebook — create from scratch or import photos, scans and screenshots. Everything becomes a clean, organized notebook ready to export as PDF in one tap. Blank, ruled, squared, or dotted pages. Annotate with Apple Pencil. Reorder anything. No subscription. No cloud. No account. Everything stays on your device, forever. One-time purchase. Available on the App Store.