The M3D Viewer!

Transform your smartphone into an immersive 3D viewing experience with MS3D Glasses. Designed to work seamlessly with both iPhone and Android devices, these innovative optics let you explore 3D content, videos, and photos through the MS3D ChaCha app. The thoughtful design keeps your thumbs free to control playback and skip ads while wearing them. When you're done, the glasses fold flat against your phone for pocket-friendly storage, and they double as a versatile mobile stand. Whether you're diving into 3D entertainment or capturing your own content, MS3D Glasses bring a new dimension to mobile viewing.

Fits most phones.  It has a firmer fit than most phone attachments.  Great for the Xreal Beam Pro cameras!

Works on phones with widths of 2 1/2 inch (67mm) to 3 1/2 inch (86mm) wide. If the image appears too wide on your phone don't forget to use i3dsteroid (Apple IOS) or 3DSteroid (Android) to properly size the image.