Best STLLens alternatives: apps like STLLens: 3D Model Viewer

3D File Viewer - PrintPeek

Fast STL OBJ 3MF PLY previews

Free

Quickly view and inspect 3D model files like STL, OBJ, and PLY. Rotate, scale, and switch display modes for detailed examination. Export clean images or mesh formats for sharing.

Offline PDF Editor: ProperPDF

Edit, Fill, Sign & Chat PDF

Free

This app offers a comprehensive suite of PDF editing tools that operate entirely offline on your device. It allows you to merge, split, compress, convert, sign, and fill PDFs without needing an internet connection or uploading your files to the cloud. An AI chat feature is also available for summarizing and querying your documents locally.

OpenShape3D

Mobile Precision modeling CAD

Free

Create precise 3D models directly on your mobile device using intuitive touch controls. This app offers robust sketching tools, advanced solid modeling operations, and various viewing modes, all powered by a professional-grade geometry kernel.

GCode Scanner for CNC Machines

Machinist Toolkit, AI Chatbot

Free

This tool allows users to view and simulate CNC machine code (G-code) and 3D model files (STL) before production. It helps prevent errors, save tools, and reduce setup times for machinists, programmers, and engineers.