ExTr banner
Select the timezone and currency while opening the app for the very first time. This can be changed later.
The home screen of the app showing the current day expense.
On clicking the + logo at the right bottom we can add expense to our list with the amount and description about object.
List of items are shown that are added throughout the day. The items and their amount can be edited.
List of items/expenses within the current week. week can be selected using calendar.
List of items/expenses within the current month. Month can be selected using calendar.
A sidebar for easy access to analytics, settings, support and pro(coming soon).
Analytics page for analyzing expenses.
Contact Us page for help and reaching out for suggestions.
Settings page for selecting Theme, Mode, Timezone, Currency, Widget settings(coming soon), and to Reset App Data.
Pro Page to access pro subscription (coming soon).
Dark mode
Sapphire theme
Emerald theme
Sapphire theme in dark mode
Emerald theme in dark mode

ExTr - A Minimalist Expense Tracking App

Inspiration

We were inspired by a viral tweet about an expense tracking app that focused on daily, weekly, and monthly expense summaries. The tweet received a lot of engagement, which clearly showed that people are actively looking for a simple, minimalistic way to manage their daily spending. This helped us realize the real need for a clean and focused personal finance tool and that’s how ExTr was born.

What it does

ExTr is a minimalist expense tracking app that helps users log and monitor their expenses on a daily, weekly, and monthly basis. Users can enter the item name and amount, and the app automatically categorizes and sums them up by day, week, and month.

Features include:

Viewing a running list of all added expenses
Jumping to a specific date to review past expenses
Switching between themes and fonts for personalization

Our focus was on making a functional app with only the most essential features for everyday users.

How we built it

We built ExTr using React Native and Expo for cross-platform development. The UI is clean and responsive, leveraging modern design principles to keep things minimal yet intuitive. We used local state management and date utilities to organize expense data into day/week/month categories efficiently.

Challenges we ran into

Designing the user interface to be truly minimalist while still retaining essential functionality
Managing date-based filtering and grouping without over-complicating the logic
Ensuring performance and responsiveness when viewing or jumping to specific dates
Balancing features vs simplicity resisting the urge to overbuild

Accomplishments that we're proud of

Built a fully working MVP with real-time expense tracking in a minimalist interface
Smooth functionality to filter and jump to any date
Stayed true to the principle of "less is more"
Implemented a theming system to enhance user experience

What we learned

User-focused design: It's important to deeply consider what users actually need, not just what we can build
React Native + Expo is powerful for quick, cross-platform development
Simplicity is hard it takes thoughtful decisions to keep a product minimal

What's next for ExTr

Add user accounts and authentication for personalized and cloud-based tracking
Implement analytics and charts to help users understand their spending habits
Introduce a subscription-based model for syncing, backups, and insights
Explore AI suggestions for budgeting and expense optimization
Publish ExTr on app stores with a privacy-first and minimalist approach