Dazzly is a free-to-use coloring book app for iPhone that lets you create unique and dazzling art with the help of diamonds, rubies, and sapphires. The app features a vast collection of over 7000 images to color, ranging from mandalas, animals, and jewels, to much more.

Using the Color by Number feature, you can match the real handpicked diamonds and gems with their corresponding numbers to create hundreds of beautiful artworks. The app is family-friendly and offers content that helps to reduce stress and anxiety. You can also use your finished art as a unique wallpaper or share them with your friends and family on social media.

Dazzly Premium offers a subscription-based service that provides additional features, including unlimited access to all 7000+ Dazzly pictures, daily updates, and the "Choose your own Colors" mode. The subscription costs $9.99 USD per week for the weekly plan, with other options available as well.

Overall, Dazzly is a great app for those who want to relax and create something beautiful at the same time. The app is easy to use, and the vast collection of images ensures that there is something for everyone.