TRIDENTWorks with no signal
Each morning the app loads three days of jobs onto the phone. Your team can complete forms and take photos anywhere; everything sends itself as soon as there's signal. Nobody can mark a job finished until it has all sent.
Trident Field
Stamped photos, signed RAMS, and it works with no signal.
Trident Field is the phone app for your installers, surveyors and site teams. A job can't start until the safety checks are done, and it can't be closed until the photos and forms your client's pack needs are in.
Fewer return visits for a missing photo, and nobody chasing a serial number on WhatsApp.
One missing photo can cost you the whole home
Funded retrofit is now paid on proof. TrustMark requires photos to be date and time stamped and geotagged, taken at the right stage of the install. Miss one, blur a serial number, or take it on someone's personal phone, and the home either waits for payment or needs another visit.
It gets worse when it goes wrong. Since 13 July 2026, closing a TrustMark non-compliance needs a video walkaround, and there are eight weeks to fix it.
And the typical field set-up makes it hard to get right:
- Photos sit in personal camera rolls and WhatsApp groups instead of with the job
- Paper RAMS signed (or not) in the van
- Generic job apps that don't know what a loft insulation pack needs
- Rural sites with no signal, where apps freeze halfway through a form. 4G from all four networks reaches only about 81% of the UK.
Sources: TrustMark quality assurance · GOV.UK, December 2025, citing Ofcom Connected Nations
What it does on site
- Jobs on the phone Three days loaded each morning, so no signal is needed
- RAMS signed Opened and signed on the phone
- Safety check Holds if anyone answers "stop", or there is no asbestos survey on file
- Photos and forms Taken in the app, stamped with time, place and question
- Close-off Holds if anything the client pack needs is missing or still unsent
- In the office On the right home in Trident Retrofit
Try a job on the phone
Sign the RAMS, pass the check, take the photos and close the job. Turn the signal off part way through and see what happens.
Example with made-up data. Work through the job.
Loft insulation · 14 Example Street
- 1RAMS
- 2Point-of-work check Is the loft access safe to use?
- 3Photos
- 4Close the job
What the real app does at each step
- The RAMS are opened and signed on the phone, with the name and time recorded.
- A "stop" halts the job until a named supervisor lifts it.
- Photos can only be taken in the app's own camera. Gallery photos and blank frames are refused, and nothing goes to a personal camera roll.
- With no signal, everything is saved on the phone and sent when it can be.
- The job can't be closed until every photo and form the client pack needs has been sent.
Try publishing a form
A form can't go live until it collects everything your client's pack needs. Try publishing this one before it does.
Example with made-up data. Cover the pack, then publish.
Loft insulation install form · draft v1
- Loft photo before work Photo question
- Insulation depth photo, ruler in shot Photo question
- Loft photo after work Photo question
- Hatch insulated and draught-stripped Photo question
- Installer declaration, signed Signature question
- Product certificate Office uploads it, with a chase
Run a whole home through Trident, office and phone
Photos taken in the app
Photos are taken inside the app's own camera. The time, the home, the question it answers and the GPS location are burned onto the picture. Photos from the gallery and blank frames are refused. Nothing is saved to a personal camera roll.
Safety checks before the job starts
Before work starts, the operative opens and signs the RAMS, confirms they've arrived, and completes a point-of-work safety check. No asbestos survey on file, no start. If anyone answers "stop", the job halts until a named supervisor lifts it. In hot weather, extra questions are added automatically from the Met Office forecast.
Forms built from the client pack
Your office builds and versions the forms. Trident won't let a form be published if it misses anything your client's evidence pack needs for that measure. If you have worksheet templates in another system, they can be imported as a starting point.
Everything else that happens on site
- Resident statements with a drawn signature
- Ladder, end-of-day and weekly health and safety checks
- Quality inspection visits
- Scaffold tag and strike checks
- Site variations with photos, sent straight to the office for pricing
- "Couldn't do this job" reports, so the office knows why and can rebook
- Notices pushed from the office to the crew
- A digital ID card showing each operative's qualifications
Easy to roll out
No app store. Your team opens a link and adds Trident Field to their home screen, on iPhone or Android. They sign in with a code sent by email; accounts are created by your office only. If a phone is lost, sign it out remotely and its data is wiped. There's even a practice job on a made-up home so new starters can learn without touching a real one.
Joined up with the office
Because it's part of Trident, what's captured on site lands on the right home, in the right place in the evidence, the moment it sends. Variations go to the office's pricing queue. The office sees what's done, what's waiting and what's missing without a phone call.
The other parts of Trident
Trident has three parts that share the same records. Start with the one you need.
- Trident Retrofit is the office system. It holds every home, every booking and every document, and checks each home is ready before it moves on.
- Trident Field is the phone app for the people on site. What they capture lands straight on the right home in Retrofit, so the office sees evidence the moment it's sent.
- Trident Solar is the design engine. It is the same engine that designs solar inside Retrofit, so a retrofit contractor gets solar design as part of the programme, and a solar installer can use Solar on its own.
Who it's for
Installers, surveyors, quality inspectors and site teams working on funded retrofit programmes, whether they're your own staff or your subcontractors.
Common questions
- No app store needed. It's a web app your team adds to their home screen in seconds. On iPhone, results send while the app is open, so crews open it once they're back in signal.
- It's part of Trident. Evidence lands straight on the home in Trident Retrofit, so there's no export, upload or double entry.
- Forms for any measure. Ready-made forms cover loft insulation, solar PV, ventilation and roof work, and your office can build more.
Watch a job go through the app
Thirty minutes on Teams. I'll walk a job through the app on a practice home, from the RAMS to the last photo, and you'll see the evidence arrive in the office.
If you go ahead, I build your forms from your client's evidence requirements.
Or ring me, Steven Hassall, on 07807 025270. I built Trident and I'll be the one on the call. Email works too: hello@trident-os.com.
If it isn't right for how you work, I'll tell you.