Case Study

Tidy Shop

Fast offline sales tracking for busy convention booths.

Record sales, track stock, run promotions, and review each event without a bank connection or reliable internet.

Why Tidy Shop exists

The challenge

The approach

Add the products you’re bringing, set up the convention or market you are attending, then link each sale to that event.

Tap products visually, apply a promotion if needed, and record whether the customer paid with cash, transfer, or card.

Review total sales, earnings, profit when costs are added, low stock, popular products, and sales channels.

Start a session on one device, scan its QR code from another phone, and record sales together while staying offline.

A fast sales and inventory tracker for convention sellers who cannot stop to write everything down.

Built the Flutter app across sales, products, events, promotions, analytics, settings, and sync.
Designed visual sale entry for quick use while sellers are serving customers.

Modeled products, events, sales, sale items, promotions, and settings locally with Drift and SQLite.
Stored each sale and stock update in one transaction so inventory stays accurate.

Built host and terminal sessions with QR code joining, processed message tracking, and duplicate sale protection.
Added reconnect snapshots plus ZIP backup export and import for device recovery and portability.

The local data and sync rules that keep stock accurate while several people are selling.

The app records sales and inventory locally. It does not need internet, a bank account, or a payment processor to keep working.

A sale, its products, and the inventory change are stored in one transaction so stock cannot fall out of step with sales.

One device starts a local session and shares a QR code. Connected devices send sales to that host, which keeps the stock count in sync.