It is an app designed to help Plumbers access quick and efficient billing channels. 

See prototype

Role: UX Designer

Tools: Figma

Timeline: November 2021

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A plumber is an adventurer who traces leaky pipes to their source.

- Arthur Baer


We had a small family business in the plumbing industry. Most of the work they did were subcontracts under bigger companies, and these companies always took their time to settle their bill. As part of my UX Design course, I chose this challenge prompt as it was a way for me to help other plumbers combat this issue to ensure they get paid.

This is a Case Study.

I was the sole designer on the project and my responsibilities included research, user interviews, wireframing, prototyping, usability tests. We could take our time with the course but there was deadlines, and some key achievements listed below:

The Problem

Scope: Plumbers want to make use of quick and efficient client billing channels.

I conducted a brainstorming workshop with the team to uncover pains felt by individuals. It was revealed that:

  • Individuals in various industries were looking for a similar app.

  • Individuals preferred a simple process and interface

  • Individuals want an all in one solution.

Product Strategy

Goal: Help plumbers, or any service provider, manage their clients and appointments while providing client billing services.

From these findings, we decided as a product to identify key business goals:

As a starting point, we each did some market research on competitors to investigate the current offerings in the market and take inspiration from particular features that we liked about each app.

I then conducted a 15 minute sketching session to encourage different variations on the vision of the solution.

User Personas

I identified the user personas and rendered the following:

Persona 1

Persona 1

Persona 2

Persona 2

Defining the MVP

Based on the sketching sessions, it was revealed that there were commonalties in the product vision. We identified the following key user stories:

  • Create a task.

  • Share invoices and receipts.

  • Schedule an appointment.

  • Track work history.

Lofi screens

In order for the engineers to begin on the architecture, I mocked up the main screens for the MVP based off the sketches and came up with the following screens:

  • Get started

  • Register profile

  • Home

  • Create a task

  • Share invoice and receipts

  • Schedule

User Pain Points



Struggling to navigate through app functionalities



Not understanding the different functions in the billing app.



There is a struggle to move from estimate to invoice, to appointment.


With the clock ticking, I quickly did some mockups of the basic user journey before going over it with the desired styling. I opted for a refreshing gradient look and the simplicity of the UI.

I then created for the developers a clickable prototype in Figma.

Get started screen

In the first version of this platform, there was no get started screen. It was industry standard to incorporate a screen that simply showcased the logo and encourage users to get started.

Home screen

Register screen

Users would fill in a simple sign up form to create a new account.

Home screen


Users are able to navigate between their task lists, schedule and invoices.

Home screen

Task definition screen

Users able to define the details around their tasks

Home screen

Home with a task

Users are able to share the invoice through various platforms.

Home screen


Users are able to view the history of their tasks as well as have an overview of when they are scheduled for.

Home screen


As this was a course project, I am not yet able to take these designs into development stage to make it an end-to-end project. However, I captured all the artefacts that was produced through each stage of the design process.

See slidedeck

See prototype below:

Results and takeaways

The app could change the way small businesses work, by providing means to integrate to different platforms as well.

I learned that simplicity is key, accessibility drives engagement, affordability will enable more people to use it. Last but not least, personal experience will determine whether the product will timeless.

Some things I would do differently:

  • I want to simplify the flow of the process so that it can make room for more functions to increase productivity.

  • I need to introduce a simpler user interface to incline more people to make use of the app for fast and efficient client billing.

  • The user flow needs to be made intuitive to encourage an easier navigation.