My Whiteboard software doesn't work well on mobile devices. Are there more mobile-friendly options available?

FreeForm is a free collaborative whiteboard app for Mac, iPad, and iPhone. To brainstorm and plan projects, sketch, import other media, and place shapes and text boxes. Exchange boards with up to 100 individuals to work together in real time.

Physics Wallah uses Note 3 Whiteboard for teaching purposes.

The work done in Microsoft Whiteboard can be exported to OneDrive, after which it automatically saves the work done or changes made.

To improve the learning experience, teachers can use the feature of pulling images, stickers, shapes, and content from other documents which make learning for students' fun.

The paid versions have no restrictions on any tools or features you might want to use for your work. However, Microsoft Whiteboard and Jamboard by Google are free tools that provide you with every feature without any purchases.