The same viewer as the desktop and the browser, for Android and iOS: open a file from your phone or tablet — a STEP from a mail, an IFC from a shared folder — and see the exact geometry, on the device, with nothing uploaded anywhere. Free on the stores; and a paid edition for those who need to get things out of it.
Open and look: the seven formats, the tree, the query language, picking, a triangle budget measured on real devices so a large assembly stays fluid. Everything the browser viewer does, as an app.
Android and iOS.
The lightning in the mark is what produces the mesh; Bolt is the edition that lets it out. Export what you are looking at — STL, glTF, OBJ, Gmsh MSH — plus the tools that a phone makes awkward for free — the details will be on this page when it ships. One purchase on the store, no account.
Android and iOS. Coming after the free viewer.
Phones have a triangle budget, and the viewer respects it: the part is drawn to a budget measured on real handsets and tablets, with levels of detail chosen per part so a large assembly stays fluid instead of freezing the device. The tree, the query language and picking are the same as on the desktop; touch drives the camera.
Android phones and tablets (arm64, Vulkan), iPhone and iPad (Metal). Files come in from the share sheet, the files app, or a link; they are read and tessellated on the device.
The free viewer is on its way to Google Play and the App Store, Bolt follows; this page will carry the store links. Until then the same viewer runs in your phone's browser, and the Discord server is where each release is announced.