Based on our record, Mydraft.cc seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
You might consider hiring someone to build it for you. Recently got a simple app built using Upwork, hired two guys, got two versions of the app, went with the one we liked best. We mocked up some wireframes (https://mydraft.cc/ is a good tool for that), set the basic parameters we needed it to fill, and it was way easier than I thought it'd be. Source: almost 2 years ago
Wireflow - Create beautiful flowcharts
Zen Flowchart - The simplest tool to create flowcharts
Invision - Prototyping and collaboration for design teams
Speedy Flowchart - For developers to be able to draw flowcharts, convert them into text files and add them into there code or readme quite quickly.
Pencil Project - Single-user mockup / wireframing / diagramming tool
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.