PartPeek
PartPeek showing a STEP assembly, every part in its own colour

PartPeek

Open the CAD file. Measure it. Get the drawing.

A CAD viewer for Android. It opens STEP, IGES, STL, glTF and more, measures like your desktop CAD, and makes the 2D drawings for you.

Works offlineNo accountNo trackingPro is one-time

Coming soon to Google Play

This is a real STEP file. Drag it. Then scroll.

Why it exists

We open other people's CAD files all day. At the desk, in the workshop, in the car park. The phone was never good at it. So we built the viewer we needed.

PartPeek opens the file you got by mail, lets you measure it the way your desktop CAD does, and turns it into 2D drawings while you watch.

  • ForEngineers and buyers who get STEP files by mail and need an answer before they are back at the desk.
  • ForWorkshops that need one dimension now, or a drawing of a part that never had one.
  • ForAnyone who wants twenty drawings without spending a day on them.

The model on this page is as1, a public sample from the CAx Implementor Forum. Every image on this page comes from the app.

Automatic 2D drawings

From a STEP file to a set of drawings. In a minute.

Automatic drawing of the plate: top, front and side view, hole pattern with 6x diameter 10 on two pitch circles of 30, overall dimensions 150 by 20, isometric, title block
Assembly sheet: isometric view and a parts list with item, part, quantity and page
Page 1 of 4: the assembly, with the parts list and the page of every part.
Part drawing of the l-bracket with three views and dimensions
Page 3 of 4: the bracket. Nuts and bolts are recognised as standard parts and get no sheet.

Tap Drawing. PartPeek reads the geometry, picks the views, places the dimensions and the holes, fills the title block and writes a PDF. The four sheets on this page came out of a phone, unedited.

  1. 01

    Views that make sense

    Front, top and side in first-angle projection, plus an isometric. Thin parts get their thickness as a note, turned parts their diameters.

  2. 02

    Holes, counted

    Hole diameters with their count, pitch circles, angles and positions from a zero edge.

  3. 03

    Assemblies too

    An assembly sheet with balloons and a bill of materials, then one sheet per part. Pick parts, sub-assemblies and weldments in the drawing set.

  4. 04

    PDF, and DXF for your CAD Pro

    Save or share the PDF. With Pro the sheets carry your own title block instead of the watermark, and you can export DXF, move or hide a dimension, add a measured one, or put weld symbols on a weld sheet.

Four sheets, under three seconds, on a mid-range phone.Measured on the assembly on this page, a drawing set of four pages: layout and PDF took 2.9 s on a OnePlus Nord. Every sheet still says "Auto-generated, check before use"; Pro can turn that line off.

The drawing screen in the app: the generated sheet on the phone with page controls
The moment a drawing set is ready: the app says Drawing ready with an Open button while the model stays on screen

Measure, cut, pick

The things you actually do with a model.

Measuring in PartPeek: dimension lines with dX, dY and dZ between two picked points on the assembly

01Measure Free

Measure like in your CAD

Tap a vertex, an edge or a face; a second tap measures between the two. Snapping filters for each, a preview before you commit.

  • Distance with dX, dY and dZ, drawn as dimension lines on the model
  • Angles, diameters, hole to hole from the centres, the minimum or the maximum
  • The list keeps your last five measurements. Pro keeps them all, next to the file, and writes them out.
A horizontal section through the assembly at Z 38 mm: the brackets cut open, the cut faces hatched, the plate and the nuts below the plane

02Section Free

Cut it open

A section along an axis or through an edge you pick, hatched per part. Slide it through the model, flip it, keep it with the file.

  • Through a slanted or round edge: centre, minimum or maximum
  • Bolts stay bolts: each cut part keeps its own cap
The parts panel: 18 parts, the l-bracket sub-assembly folded, the plate selected in amber, an eye per row to hide it

03Parts Free

Pick the level you mean

Hold a finger on a part and choose the level: the part, its sub-assembly or the whole thing. Flick to select or deselect without leaving the model.

  • Colour by part, so a flat grey import becomes readable
  • Hide, isolate, and keep selection groups for later. Short hints appear once, where they apply.
  • Identical parts count as one in the drawing set

Files

Open what you get. Export what they need.

Opens

STEPIGESBREPSTL3MFOBJglTFGLBPLYDXF 2D

From Files, mail, a chat or any share sheet. STEP, IGES and BREP are read with Open CASCADE Technology, the open source kernel many CAD tools build on. Big assemblies load coarse first and refine while memory allows.

Exports Pro

STEPIGESBREPSTL3MFOBJglTFGLBPLYPDFDXF

Convert a model to the format the next person needs, with coarse, normal or fine meshing, and every result read back and checked before it is handed over. Drawings go out as PDF, and with Pro as DXF.

On a tablet

Room for the list next to the model.

On a tablet or a folded-open phone the measurements and the selection groups sit beside the view instead of over it. The same file, the same gestures, more space.

PartPeek on a tablet: a 180 mm dimension on the plate and the list of three measurements open beside the model, with an Export button

Free and Pro

Viewing and measuring are free. Forever.

Pro is a one-time purchase in Google Play. You pay once, and the Pro features that land later are yours too.

Free Stays free

  • Open every format above, offline
  • Turn, zoom, view cube, colour by part, hide and isolate
  • Measure with snapping, dimension lines, angles, diameters and hole to hole
  • Sections, kept with the file
  • Selection groups and assembly levels
  • Automatic drawings of a part or an assembly as PDF, with a small "PartPeek Free" mark on the sheet

No time limit, no file limit, no ads, no account.

Pro Pay once

  • Drawings without the watermark, and your own title block: logo, company, drawn and checked by, revision, drawing number
  • DXF drawings for your CAD, and small edits on the sheet: move or hide a dimension, add a measured one or a note, weld symbols
  • The drawing set: pick parts and sub-assemblies, get the assembly drawing with balloons and bill of materials, one PDF per part, the BOM as Excel or CSV
  • The measurement list without limit, saved next to the model and written out as text, Markdown, CSV, Excel or Word
  • Mass, volume and surface area, with your own density
  • Export the model as STEP, IGES, BREP, STL, 3MF, OBJ, glTF, GLB or PLY

One-time purchase in Google Play. The price is on the store page.

What we are thinking about Not promises

  • The same kernel and drawings on a desk computer
  • More ways to adjust a sheet without leaving the app

We only announce a feature when it is finished.

Who makes it

Built by an engineer who needed it.

PartPeek is made by BRAVO, a one-person company in Belgium. The person who writes it spends his days opening customer models, measuring them and putting them on drawings, at the office and on the road. The app does what that work needs and nothing else.

It makes use of facilities provided by the Open CASCADE Technology software (LGPL 2.1 with the Open CASCADE exception). The licence texts and how to replace the library are in the app under Settings.

Privacy

Your files stay on your phone.

The app has no permission to use the network. No server, no account, no ads, no analytics, no crash reporting. Your model is read and drawn on the phone; what you make is kept in a small file next to it. The only thing that talks to the outside world is Google Play, for the Pro purchase.

  • Android only. No iPhone version.
  • Not a CAD editor: it reads models, measures and draws them. To change geometry you still need your CAD.
  • Details in the privacy policy.

Questions

Asked before

How exact are the measurements?

STEP, IGES and BREP are read as exact geometry by Open CASCADE and then meshed for the screen. Measurements snap to the vertices, edges and faces of that geometry; the numbers are those of the model, shown in the unit you choose.

Can I trust the automatic drawing?

Check it, like any drawing. It is generated from the geometry, so the dimensions are right, but the choice of views and the placement are automatic. Every sheet carries the line "Auto-generated, check before use" for that reason; Pro can switch it off.

Does the app upload my files?

No. PartPeek has no network permission at all. Nothing leaves the phone unless you share a file yourself.

Where do my measurements and sections go?

Into a small text file next to the model, with the same name and the extension .partpeek. Open the model again and they are back. In the free app the measurement list is kept in the app only and holds the last five.

What happens to Pro on a new phone?

Pro is linked to your Google account. Install PartPeek on the new phone with the same account and it comes back by itself. If not, open the menu, tap PartPeek Pro, then Restore purchase.

Is there a version for Windows or Mac?

Not yet. The phone and tablet version comes first. Mail us if a desk version matters to you; it helps us decide.

PartPeek

For Android. Free, with a one-time Pro.

Coming soon to Google Play

Questions first?

Mail [email protected]. We read every mail, in English or Dutch.

Support and FAQPrivacy policy

Made by BRAVO in Belgium.