Andrews Academy
Product · 3D viewer and editor Free

AP Viewer PLUS

Free to view and measure. Pay only for PLUS.

Free desktop application to open STL, PLY and OBJ meshes, with geodesic measurements, wireframe, cutting, grid and PDF reports — at no cost, forever. You only subscribe if you use the PLUS features: model creation, comparison, alignment, mesh editing, booleans and advanced cuts — with a 30-day free trial.

Windows 10/11 · .exe ~140 MB v1.5.2 — downloads

Developed by Dr. Andrews Porto · Viewing is free forever

AP Viewer PLUS logo
Free forever

View, measure and document at no cost

All of this works for free, with no usage limit and no credit card — just download and open your files.

STL · PLY · OBJIntraoral and facial, with texture
Geodesic measureAlong the mesh surface
Linear measurePlus mesh thickness
WireframeCheck the scan density
PropertiesVertices, triangles, dimensions
Cut2-point trimming
GridMillimeter reference background
ScreenshotViewport capture
PDF reportCase screenshots and measurements
Colors and opacityCustomize every mesh
PLUS features · paid

The PLUS items: from scanner to printed model

These are the advanced subscription features — all with a 30-day free trial when you sign up inside the app (no credit card). On the toolbar they carry the + badge.

Make Model PLUS

Step-by-step wizard that turns the scan into a based model (solid or hollow), interlocking tubes between arches and an embossed name — ready to print.

Compare PLUS

Align two scans by 3 points + ICP and see the difference as a color heatmap with clinical metrics (RMS and P90). Ideal for before/after and quality control.

Align PLUS

Fixed + floating: reposition one scan over another with a reliability level for the fit and export the file already in the aligned position.

Edit mesh PLUS

Line cutting, a brush to remove or keep regions and hole filling — clean and prepare the scan before using it.

Boolean PLUS

Unite or subtract solids with each other and with primitives (sphere, cone, cylinder, box) — the result is always watertight, ready for printing.

Cross-section PLUS

Position a plane with 2 clicks and open the section view with measurements in mm — just like planning software.

Cut Plane PLUS

Cut solid models with a plane using a 3D gizmo: pick the side to keep and the cut face comes out closed (subtractive boolean).

And more

Constant updates with new PLUS features, use on up to 2 machines per license and direct WhatsApp support.

Demos

See PLUS in action

Short clips of each PLUS feature, straight from the app.

Make ModelFrom scan to printable based model.
CompareAlignment + fidelity heatmap between two meshes.
AlignFixed + floating with confidence level and export.
EditingBrush and lasso to clean, close holes and build bridges.
BooleanUnion and difference between solids with a 3D gizmo.
Cut PlaneCut one or more solids with a plane, with live preview.
Cross-section2-click section view with contour measurements.
Interface

Simple and to the point

Toolbar on top, properties panel on the right, 3D area in the center. Done.

AP Viewer PLUS showing a scanned upper arch
AP Viewer opening an UpperJawScan.ply with the properties panel open.
Geodesic measurement · free

The difference between a straight line and the surface

Measuring an arch with a straight line always underestimates the real distance. Geodesic measurement solves that by following the curvature of the mesh.

What is a geodesic measurement?

It is the shortest path between two points along a curved surface. Instead of cutting through the "air" like a ruler, the software computes the path that stays glued to the mesh — it crosses the gum, wraps around the tooth, follows the palate.

It is the correct way to measure:

  • Arch perimeter (from right to left canine)
  • Real gum length between teeth
  • Preparation contours and margin lines
  • Distances on palatal and lingual surfaces

Linear isn't wrong, it's incomplete. Geodesic gives you the number that matches the clinic.

Geodesic measurement following the gum contour
Geodesic measurement — follows the gum curve.
Visual comparison: straight linear line vs curved geodesic line
Geodesic vs linear comparison between the same two points.
Wireframe view showing the polygon mesh over the teeth
Wireframe · free

See the mesh from the inside

Toggle between rendered surface and wireframe with one click. It's the fastest way to evaluate scan density, low-resolution areas and regions that need rescanning.

Combine it with adjustable opacity and you can see mesh and texture at the same time — without losing any detail.

PLUS plans

The app is free. PLUS starts at R$ 49.90/month

Sign up inside the app and try every PLUS feature free for 30 days, no credit card. Liked it? Subscribe — payment by card or Pix with automatic activation. Didn't subscribe? The app keeps working for free for viewing and measuring.

Monthly

R$ 69.90/mo

Recurring card billing — renews automatically every month. Cancel anytime.

Subscribe monthly

Semiannual

R$ 59.90/mo

R$ 359.40 every 6 months — card in up to 6 installments or Pix. Save 14%.

Subscribe semiannual
Best value · −29%

Annual

R$ 49.90/mo

R$ 598.80 per year — card in up to 12 installments or Pix. 12 worry-free months.

Subscribe annual

Secure payment via InfinitePay · instant automatic activation · e-mail receipt · up to 2 machines per license · hassle-free cancellation

Download now

Free · pay only if you use PLUS

Download and use at will: viewing and measuring are free forever. The first time you click a PLUS feature, the app offers a sign-up with a 30-day free trial — no credit card.

Download AP Viewer PLUS 1.5.2

After downloading, run the installer. Compatible with Windows 10 and 11.

About the developer

Dr. Andrews Porto — dental surgeon, master's degree in digital dentistry from Mandic, CEO of Andrews Planning. I build the tools I use in my own clinical routine.