Job management apps that actually work offline —
for the basement, the plant room and the new-build with no mast yet.
“Works offline” is the most abused phrase in trade software. Sometimes it means the whole app runs on the phone and syncs later. Sometimes it means a cached page that will not let you save. This guide sorts the two, using the vendors’ own statements, and gives you a test that takes two minutes.
Written by the founder — a UK Gas Safe registered & NICEIC engineer. Published 9 September 2026.
Full disclosure: Quick Lead is our product, so read this with that in mind — this is our website, not a neutral directory. What we promise instead of neutrality: every price and feature claim about another product was checked against that vendor’s own website in September 2026, sources are linked, and we say plainly when a rival is the better pick. Spot an error? [email protected].
The three things “works offline” can mean
Level 1 — read-only. You can see today’s jobs because the app cached them. You cannot create, edit or save anything. Useful for finding the address; useless for doing the work.
Level 2 — create and edit, then sync. You can open a job, fill and sign a certificate, write an invoice, and it all sits in a queue on the phone until signal returns, then uploads. This is what a tradesperson means by offline. Quick Lead, Gas Engineer Software and Powered Now each state this on their own sites.
Level 3 — everything. Does not exist for anything that involves email, payments or AI, because those need the internet by definition. Any vendor claiming it is describing Level 2 with marketing on top.
What each vendor says about offline, in its own words
Checked September 2026 (help-centre statements July–September 2026). “No clear statement” means we could not find a definite claim either way on the vendor’s site — not that the app fails.
| App | Offline claim | Where it says so | Certificates offline |
|---|---|---|---|
| Quick Lead | ✓ Full create/edit/sign, syncs later | Pricing and trade pages | ✓ all 10 types |
| Gas Engineer Software | ✓ Offline-capable apps | Features / integrations pages | ✓ |
| Powered Now | ✓ Offline working | Features pages | ✓ Professional tier and up |
| Tradify | ✗ “Dependent on a live internet connection” | Tradify Help Centre | ✗ |
| ServiceM8, Workever, Joblogic, Commusoft | No clear statement found | — | Test it |
Sources: Tradify Help Centre — Does Tradify work offline · gasengineersoftware.co.uk · powerednow.com · Quick Lead: quicklead.app/pricing. If a vendor’s statement has changed, tell us at [email protected] and we will update this table.
The airplane-mode test
Run this on every app you trial, including ours. It settles the question better than any feature list.
- With signal: log in, open the app once, open one job and one blank certificate so the app has had a chance to store what it needs.
- Switch on airplane mode. Wi-Fi off too.
- Open the app from the home screen icon, not from a browser tab. Does it open at all? (Level 0 fails here.)
- Create a new job and start a certificate. Fill three fields and draw a signature. (Level 1 fails here.)
- Save it. Force-close the app. Reopen it. Is your work still there? (Cached-page apps fail here.)
- Switch airplane mode off and wait a minute. Log in on a laptop. Has the job and certificate arrived, with the signature? (Broken sync fails here, and it is the most expensive failure of all because you find out weeks later.)
- Bonus: repeat step 4 with a half-finished certificate you started online. Some apps handle new records offline but not edits to existing ones.
Where UK tradespeople actually lose signal
Boiler cupboards in basement flats. Plant rooms in the middle of a block with concrete on all six sides. Under-floor voids. Loft spaces with foil-backed insulation. New-build estates before the mast goes live. Farms. Steel-framed commercial units. Multi-storey car parks. The far end of a long Victorian terrace on the wrong network.
None of these are edge cases — between them they are a normal week for a gas engineer or electrician. Software that only works with signal is not software that works for a tradesperson; it is software that works for the office, which is who most of it was designed for.
This is why we built Quick Lead offline-first, and why we recommend the airplane-mode test even on our own trial. If it fails for you, we would rather you found out on day two than on a job.
Offline questions
The cheapest way to decide: run it on real jobs
Quick Lead’s trial is 14 days of the full Pro plan — certificates included — with no card. Forward it one real lead email and see what comes back.
Start your free 14-day trial →No card needed · Cancel anytime · Questions? [email protected]
Related guides
Eight tools priced side by side, the per-user trap explained, and a two-year cost table for a one-person business that might add an apprentice. CP12 software compared (2026)
Five Landlord Gas Safety Record apps for a one-person gas business: what they cost, what they include, and what the law actually requires of the record. Is Tradify worth it for a sole trader?
When £34–£44 per user is money well spent, when it is not, and the three questions that decide it for a one-person business. Quick Lead for gas engineers
Offline CP12 on the phone, synced when the signal comes back. Quick Lead for electricians
Offline EICR, EIC and Minor Works.
Product names mentioned on this page are trademarks of their respective owners. Quick Lead is an independent product and is not affiliated with or endorsed by any of them. Third-party details were checked in September 2026 against each vendor’s own website and may change — tell us at [email protected] if anything is out of date.