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Prototype

Expense Manager

A lightweight expense-management app for accounts, transactions, allocation rules and financial summaries.

HTMLJavaScriptLocalStorage
StatusPrototype
Built forPersonal finance
Year2026
StackHTML · JavaScript · LocalStorage

Why I built it

A personal finance system needs to be quick enough for daily use while still showing where money goes and how funds are allocated.

Key features

Accounts

Cash, bank and card accounts

Transactions

Income and expense entry

Fund allocation

Savings, learning, investment

Charts

Balance and spending visualisation

Export

CSV / XLSX-compatible data

Local storage

Prototype without server

Workflow

01Record
02Categorise
03Allocate
04Review

Showcase

01Fund allocation
100
Savings25
Learning25
Investment50
02Account overview
AccountBalance
Cash3200000
Bank18400000
Card-2400000

What I learned

Building the tool clarified which parts of the workflow deserve structure and which should remain flexible.

Next iteration

Improve architecture, validation and production-readiness.

TRY THE TOOL

See the actual tool.