In your wallet,all the paper cards, into a single app. Payment · balance · history unified.

E-money × member-card operator — Built a new next-generation wallet platform that consolidates merchant member cards, e-money balances, and credit payments into one app, delivered on iOS/Android simultaneously with Flutter.

Hundreds of thousands

Registered-card scale

Multi-store support

Instant

Balance / history sync

Push-notification linkage

Flutter

iOS / Android simultaneous development

Single codebase

Challenge

Before

Paper member cards, separate credit-card apps, and balances visible only on store terminals fragmented the user experience and the store's sales opportunities.

Carrying paper member cards for each store
Bulging wallet / loss risk
Balance check requires a store terminal
Unknown before you visit
A separate credit-card app needed to pay
Hassle of switching apps at checkout
Usage history scattered across cards
Budgeting is hard

Solution

After

All member cards, e-money balances, and credit payments unified in one app. Simultaneous development with Flutter, a robust payment foundation on PHP-Yii, and a “know before you spend” experience via real-time balance updates.

cardkeeper.example.jp

Home screen — main card balance + all merchant member cards, used in one tap

TECH Flutter BLoC PHP (Yii2) MySQL Redis

11 months

7 -person team

3 Product integration

Considering adopting this at your company? → info@amela.vn