# What are the differences between OdaMfcApp and ODA Viewer?

 1. [FAQ](/ja/faq)
2. »
3. [Examples](/faq/examples)

- OdaMfcApp can use the various rendering devices (WinGDI, Silicon Graphics OpenGL®®, Microsoft® DirectX®, Bitmap, GLES2). ODA Viewer uses OpenGL.
- OdaMfcApp can enable or disable the graphics cache (Tools->Options->Use GS model). ODA Viewer can't disable this option.