---
title: "Developer website on mobile: what breaks first"
canonical: "https://en.prostor-agency.com/blog/developer-website-on-mobile"
summary: "Unit grids, floor plans, filters, heavy renders and the enquiry form on a narrow screen: what fails first, and how to check it in a single evening."
publishedAt: "2026-11-05"
---

## A phone is not the spare screen

A residential project site is usually presented to the client on a large monitor.
The layout is approved, the renders look good, the availability grid looks the way
it does in a strong project. Meanwhile the buyer is scrolling on a phone on the
metro or the sofa. The developer is looking at one site; the buyer is looking at
another.

Below is the order in which things usually break, roughly following the path a buyer
takes.

## 1. The availability grid

The floor-by-section grid was designed for a large screen. On a phone it either
shrinks into a small table whose cells a finger cannot hit, or gets cut into pieces
that lose their meaning. Formats for the plans themselves are in [interactive floor
plans](/blog/interactive-floor-plans).

The fix is not a smaller grid. On a phone people begin from parameters: how many
rooms, what budget, which floor. A list of cards with filters works better than a
table, and the grid stays as a secondary view for those who care about location.

## 2. Floor plans

A plan drawn for a printed brochure becomes a smudge on a phone: room dimensions are
unreadable and the legend is tiny. The usual remedy is pinch-zoom, but that is an
extra action every single time.

Show what a phone can actually read: a large plan, room labels with areas, and a
separate button that opens the drawing full screen. If the plan exists only as a
PDF file, it is barely used on mobile at all.

## 3. Filters

On desktop the filters sit in a column and are always visible. On a phone they tend
to cover half the screen or hide where nobody finds them. Two typical mistakes: the
filter opens, but the results cannot be seen until it closes; and the reset is
buried so a person cannot get back to the full list.

A good sign: the number of matching units is visible straight away, and the chosen
conditions appear as a row above the list, each removable with one tap.

## 4. Renders, video and 3D

This is the heaviest part of the site. Full-resolution photoreal renders, background
video, a 3D tour, a map, animation: on a good computer it all works, but on a
mid-range phone over mobile data the page either loads slowly or stutters as you
scroll.

The principle is simple: show heavy things on request. A poster frame instead of
autoplay, the tour behind a button, images sized for the screen instead of files from
the designer's archive. The beauty stays; the price is not that the visitor leaves
before the first screen. Where the time goes and what to fix first is in
[website speed and buyer drop-off](/blog/website-speed-buyer-drop-off).

## 5. The enquiry form

On a narrow screen forms break more often than expected: the phone field opens a
letter keyboard, the button slides under the keyboard, the confirmation after sending
is out of view. Each extra field costs more here than on a computer, since typing on
a phone is awkward. What to keep and how to confirm submissions actually arrive is in
[lead form conversion](/blog/lead-form-conversion).

## 6. The call button and messenger

A phone is a screen where a call takes a single tap. A number that is not a
call link is a missed chance, because the person has to copy digits. The same goes
for messengers: the button should open a chat, not a page that describes one.

One more detail: the contact option should be reachable without scrolling to the
footer. A pinned bar at the bottom of the screen solves it, provided it does not
cover content or fight with the form.

## How to check it in one evening

- Take a mid-range phone and switch wifi off.
- Walk the buyer path: find a unit within a budget, open its plan, send an enquiry.
- Note every place where you had to zoom, wait more than a few seconds or search for a button.
- Call the number on the site and send the form: confirm both actually arrive.

The list is usually short, and the first three items give most of the benefit. Our
approach to this kind of site is on the [real estate](/services/real-estate) page.