Field service technician app: schedule, job photos and customer sign-off on the phone

A field service technician app puts each tech's schedule for the day on their phone, along with the details of every visit and a place to log the job: before and after photos, parts used, notes and the customer's signature at the end. The office sees all of it as it happens instead of waiting for the paperwork to come back.

It fits any business that sends people out to customers' homes or sites: HVAC service, electricians, plumbing and gas, alarm and camera installers, appliance repair, garage doors and gates, pest control, pool service. The trade changes; a technician's day looks pretty similar.

The problem isn't the tech, it's what gets lost on the way

In most of these businesses the work itself gets done right. What breaks is the information going back and forth. The tech gets the address in a voice note, scribbles down which part they used, takes photos that end up in their personal camera roll and has the customer sign a paper form that later gets soaked in the van.

Then at the end of the month, when it's time to invoice, or when a customer says “nobody showed up” or “that was already broken”, the digging starts: chats, photos, paper. And if the tech has since left the company, whatever they knew left with them.

One service call, start to finish

Here's what a visit looks like when everything goes through the same place:

• Morning: the tech opens the app and sees today's visits in order, with address, phone number, the customer's equipment and what was done last time.
• On the way: one tap sends the customer a WhatsApp or text message saying the tech is on the way. Fewer unanswered doorbells.
• On arrival: photos of the equipment before touching anything. They're saved to the job, not to the tech's phone gallery.
• During the job: the tech logs what they did and the parts they used, picking from a list instead of typing from memory.
• At the end: after photos and the customer's signature with a finger on the screen. The customer gets a summary as a link.
• Back at the office: the job shows up as done, with everything needed to invoice or book the next visit.

Photos and signatures protect you

Photos with a date and time, saved to each job, settle a lot of arguments before they start. If a customer complains, you open the visit and see what the equipment looked like when the tech arrived and how it was left. If someone at the office has to answer a question, they don't need to call the technician to ask.

The signature does a different job: the customer confirms they saw the finished work. Along with the photos and the parts list, you get a tidy record of every call. For the tech it's peace of mind too, because their work is documented.

What does the office get out of it?

Whoever runs dispatch stops chasing techs by phone. One screen shows which visits are pending, which are underway and which are done. When an emergency call comes in, they can see who's closest and who has already wrapped up.

What comes after gets sorted too. Each finished job can create its invoice order, and equipment that needs regular checkups gets scheduled on its own. If your business runs maintenance contracts, I covered that in preventive maintenance software. If what you need is to organize shop or plant jobs, see work order management software.

Build it so techs actually use it

A technician app fails if it's slower than paper. So I design for someone wearing gloves, in a hurry and sometimes with weak signal: big buttons, few screens, lists to pick from instead of typing, and the camera one tap away.

It doesn't have to come from an app store either. It can open from a link and be saved to the home screen; I explained the trade-offs in web app vs app store app. And if you also sell what you later install, like gates and garage doors, the Estructuras 3D blog has a piece on a 3D gate and door configurator, so the customer picks the model before the tech ever shows up.

How we'd get started

I start by walking through a working day with you, even over a video call: how requests come in, how they're assigned, what gets written down and where. From there I build a first version with the essentials, two or three techs try it out, and we adjust before rolling it out to everyone.

I work remotely from Buenos Aires, Argentina (UTC−3), so for US companies we share most of the working day. Every project is quoted on its own. You can see what else I do on the services page.

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