This app allows you to project any image from your device or camera onto a surface for drawing or tracing. It offers customization options for fonts and colors, and can even capture web pages. Tutorials are available to help users get the most out of its features.
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June 20, 2026
New scene background feature! Now you can adjust the scene background of the image to achieve a perfect projection. Additionally, tutorial videos are now available at calcaapp.com to guide you step by step. Thank you very much for your support and feedback!
MoreOne year without ads
$149.99
Permanent License
Premium features and no ads
Calca app allows you to transfer any image from your device or captured with your camera onto a surface, acting as a camera lucida or projector. This facilitates drawing, tracing, and artistic creations on paper, walls, or other surfaces.
Key features include image projection for drawing, camera lucida functionality, a 3D effect option, customizable fonts with over 1550 choices, web page capture, and support for multiple languages. Users can also customize colors for inspiration.
The app is currently free for all users, offering access to all features at no cost. However, there are plans for future options that may require points or an active subscription for full, unlocked access.
The app requires permission to access your device's camera to view and project images. While specific operating system versions are not detailed, it is designed for mobile devices that can capture images and display them.
To achieve the best results, it is recommended to use recommended supports to hold your device steady, choose a color you like, ensure good lighting, and consider using relaxing music. The app also emphasizes that practice is required, and demonstration videos are available on their website.
