Drawing register software for UK steel fabricatorsYour office drawings. Automatically up to date on site.

You add their mobile numbers on the Team page — type them, paste a list or drop in a CSV. Each person installs the app, enters their number and gets a code by text. After that the phone can unlock with Face ID or a fingerprint. A number you have not added is refused, so nobody outside your team can get in. Office colleagues are added by work email and get a temporary password to sign in with.

Subscribe takes you to Stripe. Your company name, billing details and email go in once, there. The moment the payment is confirmed, your login details are emailed to that address: your email is your username, with a temporary password that you replace with your own the first time in. Then you add your site team by their mobile numbers. We see every new company and can switch one off, but nothing waits on us.

They are kept, not deleted. When a newer revision is filed, the register marks it current and moves the old one into history with a note of what replaced it. Opened afterwards — in the office, on a site phone, or inside the ZIP export — the old sheet carries a red SUPERSEDED stamp across every page naming the replacing revision and the date it landed. The stored original is never altered.

No — and no software can do that. Once a file has been saved to a phone, forwarded or printed, it is a separate copy and cannot be stamped, changed or withdrawn afterwards. What Drawing Inbox does is keep every phone on your team on the current set, tell site the moment a revision lands, and stamp the old sheet whenever it is opened or exported from Drawing Inbox itself.

An older revision, or a file already on the register, never replaces the current one. It is filed into history as it stands, the current revision is left exactly where it was, and the office is told why. A page whose number, revision or job cannot be read waits for a person — nothing is guessed.

Drawings already opened on that phone stay readable, and the phone shows when it last heard from the office. A revision filed while a phone has no signal reaches it when the signal comes back — nothing can deliver a drawing to a device that is not connected, so we would rather say so than dress it up.

No. The office PC only has to be on while somebody is dropping drawings in. From that moment the server holds the register and keeps every phone on your team up to date, whether the office PC is on or off.

Yes, from the app: it hands the actual file — the PDF or the DWG — to whatever your phone uses to share. It is a copy, like any file you send, and it does not update itself. Drawing Inbox never sends links to drawings.

PDF drawings, DWG and DXF, and IFC models. PDFs open in the browser on any phone, IFC opens in the 3D viewer, and DWG and DXF download or forward as the real file. Models are compressed at rest, so an IFC takes far less of your storage than it does on your server.

Every job, drawing and file belongs to one company, and every request is checked against the company the signed-in person belongs to. A site worker can only read; they cannot file, rename or delete. Drawings travel over HTTPS and are held on servers in the EU.

The reader reads the title block itself, and on drawings from Tekla, AutoCAD or Revit that settles nearly every sheet. The odd sheet it cannot settle gets an assisted read of its title block, through a third-party reading service, Anthropic, and that data is not used to train models. You see what it read before anything files. DWG, DXF and IFC are never sent. They are part of the subscription; there is no count to watch.

Remove them on the Teams page. Every phone they signed in on stops receiving anything the same second — even one that unlocks with Face ID, because the server refuses it. A new phone always has to verify by text first.

iPhone and Android. Until the App Store and Google Play listings are live, open app.drawinginbox.com on the phone and add it to the home screen: it runs as an app, with alerts on Android and on iPhones running iOS 16.4 or later. Signing in works the same way either way.

Cancel any month, with effect from the end of the paid period. You then have 30 days to export everything — the register as CSV and each job as a ZIP — after which it is deleted, as the privacy policy sets out.

No. Approval carries on wherever it happens today — the engineer, the client, the main contractor's portal. Drawing Inbox starts once the approved drawing lands, and keeps everyone building from the one that won. The register is an organisational aid; the issued drawing is still the drawing.

Filing carries on. Past 20 GB the box says so plainly and nothing is lost. If you are regularly over, we will talk about it.