Sign off the job, even with no signal.
Basements, plant rooms, lift shafts, rural farms, half-built sites — the places engineers work are exactly the places with no bars on the phone. 1 Sign keeps working anyway: the whole sign-off is saved on the device and uploads itself the instant a connection comes back.
Saved on the device
Fill in the sheet, capture the signature, snap the photos — with zero signal. It's all stored safely on the phone or tablet, not lost.
Capture signaturesUploads itself later
The moment signal returns, queued sign-offs send in the background and land in your control panel — no tapping "retry", nothing to remember.
Instant deliveryInstalls like an app
Add 1 Sign to the home screen and it opens full-screen like a native app — no app store, no updates, works on iPhone and Android.
Mobile sign-offWorks offline, done properly
Nothing kills a tidy paperwork process faster than "I'll do it when I get signal". By then the customer's gone, the details are fuzzy and the job sheet is a note in someone's pocket. 1 Sign removes the dependency on a connection entirely: the engineer completes and signs off the job on the spot, exactly as they would with full bars, and the device holds onto everything — form details, the customer's signature, and the before & after photos.
When the van pulls out of the dead zone, or the phone reconnects to wifi back at the unit, the queued sign-offs upload on their own. On Android they can even send while the app is closed; on iPhone they send the moment the app is reopened. Each one is protected against accidental double-uploads, so a flaky connection never creates duplicate certificates. Your dashboard shows exactly how many are still waiting to send.
No card required · works on any phone or tablet · already use 1 Sign? Log in
More of 1 Sign
Everything works together — signature to certificate in one flow.