STL Preview vs Meshly

STL Preview helps you open and inspect STL files directly on your iPhone or iPad, without needing to return to your computer just to check a 3D model. Whether you are preparing a 3D print, reviewing a design, sharing a model with someone, or quickly checking a part on the go, STL Preview gives you a simple way to see your model clearly in 3D. Open an STL file from Files, downloads, or the share sheet, then rotate, zoom, and examine it with smooth touch controls. Instead of guessing what a file contains from its name or waiting until you are back at your desktop CAD software, you can preview the model immediately. With AR mode, you can place your STL model into the real world using your device camera. This makes it easier to understand size, shape, and proportion before printing, presenting, or continuing your design work. You can also customize the model color and background color to make details easier to see. STL Preview is made for engineers, designers, makers, students, 3D printing users, and anyone who works with STL files and wants a faster, simpler way to inspect them on mobile. Open the file. View the model. Check it before you print, share, or continue.

Need to look at an STL before you print it? Meshly opens STL, OBJ and 3MF files on your iPhone, shows the model's real dimensions and tells you whether it fits your printer's bed. Open a model from the Files app — or tap "Open in Meshly" from another app — and spin, pan and zoom it in 3D. The size readout and bed check appear right under the model. • STL, OBJ AND 3MF — binary and ASCII STL, OBJ and 3MF models, up to 80 MB and 500,000 triangles. • REAL-WORLD DIMENSIONS — width (X), depth (Y) and height (Z) in millimeters, plus the triangle count, with a bounding box drawn around the model. • PRINT-BED FIT — pick from five common 3D-printer bed sizes (180 to 256 mm) and see at a glance whether the model fits as-is, fits if rotated 90°, or is too large. • 3D VIEWER — rotate with one finger, zoom with a pinch and pan with two fingers. • SHARE THE FILE — send the model on to your slicer, AirDrop it or save it to Files. Dimensions are read from the file as millimeters, the usual unit for 3D-print files; models saved in other units will show different numbers. Meshly is a viewer — it doesn't edit or slice models. Everything is processed on your device; your models are never uploaded. Viewing, measuring and bed-fit checks are free. Your first 3 shares are free, and a one-time $4.99 unlock makes sharing unlimited. No subscription, no ads. Questions: overlapmarr@gmail.com