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3D Model Viewer vs fstl-e: catalog facts
3D Model Viewer	fstl-e
Free Free and open source under the MIT licence.	Free Free and open source under the MIT licence.
Android	Linux
Opens OBJ, STL and DAE files Readable source code useful for learning OpenGL	Opens STL files quickly Configurable background
Deliberately basic feature set Viewing only, no editing	Viewer only, no editing Small fork maintained by one developer
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.