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STEP (.step, .stp), IGES (.iges, .igs), BREP (.brep, .brp), STL, 3MF, OBJ (with .mtl), glTF and GLB, PLY, and 2D DXF. Open them from the Files app, from a mail or chat attachment, or through "Open with" and the share sheet of any app.

No. You pick the file, Android gives the app access to that one file. The app asks for nothing else.

That is on purpose: a big file is loaded in a coarse pass first so you can start looking at it, and refined while memory allows. The info line above the model shows the current detail level and the number of triangles.

"Colour by part" is on by default: every part gets its own colour so a flat grey import becomes readable. Switch to "Single colour" in the menu to see the file's own colours, or the plain grey.

Tap Measure. Tap a vertex, an edge or a face; a second tap measures between the two. The Vertex, Edge and Face buttons turn snapping for each on and off. A distance is drawn as dimension lines with dX, dY and dZ; two faces give an angle, a round edge gives a diameter, two holes give the distance from centre to centre, minimum or maximum.

Under Measurements, in the Measure bar. The free app keeps the last five, in the app, until you close the file. With Pro the list has no limit, is saved next to the model and can be written out as text, Markdown, CSV, Excel or Word.

Yes, in Settings. A file without a unit of its own is read as millimetres; the info line above the model changes that per file.

Tap Section, then +. Choose the axis or tap an edge to cut through it; for a slanted or round edge choose centre, minimum or maximum. Slide the cut through the model, flip it, or delete it. Sections are kept with the file.

Tap Drawing for the whole file, or select a part and tap Drawing for that part. The app reads the geometry, picks the views, places dimensions and holes, fills the title block and shows the PDF. From there you can save it, share it, or open the bill of materials.

Open it from the menu. Tap parts and sub-assemblies to put them in or out of the set; identical parts are counted together and standard parts such as bolts and nuts are left out by default. The set gives you an assembly drawing with balloons and a bill of materials, and one sheet per part. The assembly drawing and the sheets are free with the watermark; weldments, DXF, your own title block and the BOM export come with Pro.

Small edits, with Pro: move a dimension along its rail, hide it or bring it back, add a measured dimension or a note, put weld symbols on a weld sheet, fill the title block. PartPeek is not a 2D CAD: for bigger changes export the DXF and open it in your CAD.

Because it is. The dimensions come straight from the geometry, but the choice of views and the placement are automatic, so somebody should look at it before it goes to a workshop. In Pro the line can be turned off.

Yes. Opening, viewing, measuring, sections and drawings with the watermark are free, with no time limit and no file limit. Pro is a one-time purchase in Google Play. Features that are free stay free.

Pro is linked to your Google account. Sign in with the same Google account on the new phone and install PartPeek from Google Play; the app checks your purchase when it starts. If Pro does not come back, open the menu, tap PartPeek Pro, then Restore purchase.

Purchases go through Google Play, so refunds follow the Google Play rules. If something does not work as described, mail us first.

No. The app has no permission to use the network. Your model is read and drawn on the phone. See the privacy policy.

A small text file with what you made on that model: measurements (with Pro), sections, selection groups and the drawing set. Keep it with the model and it all comes back next time. You can delete it at any time; the model itself is never changed.

No. PartPeek is Android only for now. Mail us if a desk version matters to you; it helps us decide.