An app for site managers: goodbye to WhatsApp

Coordinate your site without the WhatsApp chaos

As a site manager, your job is to keep everything moving. Every trade knows what’s theirs, problems get solved, and nobody is left waiting. And a good part of that, today, you coordinate over WhatsApp.

The site group. The group with the plumbing subcontractor. The private thread with the foreman. The group with the client. Fourteen open conversations, with you at the centre of all of them, trying to remember who said what and whether that third-floor bathroom issue ever got fixed.

The problem isn’t a lack of communication. The problem is that none of it can be followed up. A message can’t be assigned, can’t be closed, can’t be searched. And two weeks later, “did that get done?” has no clear answer.

The real bottleneck: follow-through

Coordinating a site isn’t just flagging things. It’s knowing, at any moment, what’s pending, who has it, and what’s already resolved.

In WhatsApp, that’s impossible. Alerts get buried under good-mornings and concrete photos. The important mixes with the trivial. And you end up doing the follow-up from memory, or rewriting it into an Excel sheet on Fridays.

PinMy attacks exactly that point: it turns every issue into something that gets assigned, followed, and closed — anchored to the plan, not lost in a chat.

How it changes with PinMy

Instead of sending a message to the group, you pin the issue at the exact point on the plan. A photo, a voice note, and the problem stays nailed to where it is, with its context and its date.

But what really changes your day as a coordinator is what comes next: you can assign that point to whoever it belongs to, and follow it until it’s closed.

The board that tells you what’s open and what isn’t

When you assign an issue — text, voice, photo, or video — to a colleague, it lands automatically on their Kanban board in TO DO. When they move it to DONE, the comment is marked as resolved on the plan. At a glance you see what’s to do, what’s in progress, and what’s already closed.

This replaces three things that eat your time today:

• The snagging Excel sheets rewritten every Friday.
• The “did anyone fix that bathroom thing from last week?” messages scattered across five groups.
• The defect logs reconstructed from memory six months later.

Tag whoever needs to act

Use @mentions to alert one or several people inside any comment. They get a push or email notification, depending on their settings. No forwarding the same alert to three different groups. Whoever needs to know, knows — and there’s a record that they were told.

Subcontractors join without the hassle

With guest mode, a subcontractor opens the file in the browser and replies to an issue without installing the app or creating an account. WhatsApp’s biggest advantage was that everyone already had it; here you cut that friction without losing control or traceability.

Let’s be clear about what PinMy is not

PinMy is not a construction ERP. It doesn’t handle budgets, progress certificates, Gantt charts, or time tracking. If you need that, there are all-in-one management platforms built for it.

What PinMy does — and keeps simple — is coordinating the issues and the field work anchored to the plan, pulling them out of the WhatsApp chaos. For many site managers, that’s precisely the gap that steals the most time.

What you can do today

Only features that are on the phone right now:

• Voice, photo, video, and text pins on PDF plans and site photos.
• Kanban flow: assign, follow from “to do” to “done”, and close — with @mentions and notifications.
• Voice notes transcribed in 20+ languages.
• Guest mode for subcontractors with no account.
• Resizable area highlighting and freehand drawing on the plan.
• iOS, Android, web, and a Chrome extension. Hosted in the EU, GDPR-compliant.

A record that covers you in disputes

There’s one detail that matters when there’s a disagreement: in PinMy, only the person who creates a pin can move or delete it. Nobody can quietly erase a defect that was flagged months ago. “I told you about this on 14 March” stops being your word against the contractor’s: it’s a dated pin with a voice note at the exact point.

Start with one site

You don’t have to change everything at once. Try PinMy on a single site, on the issues that today scatter across WhatsApp, and see how much time you get back when you stop chasing the status of things.

It’s free to start, no card and no setup. You can also see how WhatsApp compares with a construction site app, or how it fits the work of the site supervisors and building engineers on your team.

Try it free · Book a 20-minute demo