Miguel's Design and Product Portfolio

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Letsun

Letsun is a side project I designed and built to help short term rental hosts track profits, expenses, and property performance. As someone who owns a rental property myself, I struggled to find a simple and affordable tool tailored to individual hosts. Most existing platforms were either too expensive or overloaded with features built for larger property managers. That frustration led me to create Letsun, solving my own problem first, and designing a product that could help thousands of other hosts do the same.

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Problem

Most existing property management and finance tools are either too expensive for individual hosts or overloaded with features designed for large property managers. For hosts managing one or a few properties, tracking true profitability is often fragmented across spreadsheets, booking platforms, and banking apps.

Solution

I created Letsun as a simple web-app focused on the metrics that matter most, like income, expenses, occupancy, and ROI. By stripping away unnecessary complexity and designing an intuitive experience, Letsun gives hosts a clear view of their property performance in one place.

The initial idea

The initial idea was a simple dashboard where users can add income, expenses, set recurring expenses and import from Excel files and add contributors to specific properties.

Persona 1 - Me (literally)

Miguel da Costa, 33, Senior Product Designer
Miguel and his partner own a rental property as an investment in Portugal. They manage bookings through an agency and track expenses manually across their phones, banking apps, and notes, making it difficult to understand true monthly profit/loss.

Pain points

Financial data is spread across multiple tools (and currencies…)
Existing property tools are too expensive or too complex
Keeping records organised for tax season is time-consuming

Goals

Track income and expenses in one place
Understand real monthly profit after fees and costs
Share property and collaborate

Persona 1 - Me (literally)

Pain points

Financial data is spread across multiple tools (and currencies…)
Existing property tools are too expensive or too complex
Keeping records organised for tax season is time-consuming

Goals

Track income and expenses in one place
Understand real monthly profit after fees and costs
Share property and collaborate

Persona 2 - Retired property owner

Adam Powell, 67, Retired
David owns three holiday rentals in Spain as part of his retirement income. He wants a simple way to monitor revenue, recurring costs, and property performance without dealing with complicated software.

Pain points

Finds existing tools too complex
Relies on spreadsheets or handwritten notes
Wants a simple, clear dashboard

Goals

Track passive income easily
Monitor costs and profitability
Compare property performance over time

Persona 2 - Retired property owner

Pain points

Finds existing tools too complex
Relies on spreadsheets or handwritten notes
Wants a simple, clear dashboard

Goals

Track passive income easily
Monitor costs and profitability
Compare property performance over time

A fragmented workflow

Short-term rental hosts rely on multiple disconnected tools to manage their business. Booking platforms for revenue, bank accounts for payouts, spreadsheets for expenses, and notes or messaging apps for maintenance. This fragmented setup makes it difficult to understand true profitability and stay on top of property performance.

Adding income

Users can quickly log income by selecting a property, entering the booking amount, date, and source of revenue. The flow is designed to be simple and fast, making it easy to keep records up to date and maintain an accurate view of monthly revenue.

Adding expenses

Users can easily track one-off or recurring expenses by assigning them to a property, choosing a category, and entering the amount and date.

Marketing website

I also designed and built the Letsun marketing website to clearly communicate the product’s value and convert visitors into users. The site focuses on feature discovery, trust signals, and frictionless onboarding.