SpendStack
lead
engineer
Overview
SpendStack is a flexible budgeting app that lets users create and name their own spending categories—as many as they need—and log every expense to them. Unlike rigid budgeting tools that force preset categories, SpendStack gives you total control over how you organize your money. You get a truly personal view of where every dollar goes, and the app works the way you budget, not the other way around.
The app runs on a freemium model: a free tier covers essential tracking with up to 10 categories and basic logging, while a premium subscription ($4.99/mo or $39.99/yr) unlocks unlimited categories, custom reports, CSV export, and multi-device sync. Success is measured by monthly active users, free-to-paid conversion, daily stickiness, and average categories per user—validating that customizable categories solve a real problem.
Mission
Value Proposition
A no-fuss budgeting app that lets users create their own spending categories — as many as they need, named however they like — and log every expense against them. Unlike rigid apps that force preset categories, this gives users total control over how they organize their money. The result: a truly personal view of where every dollar goes, without fighting the tool.
Target Customer
Anyone who budgets but finds existing apps too rigid — freelancers with irregular expense types, hobbyists tracking niche spending (gear, supplies, events), couples managing shared and personal categories side by side, or anyone who simply wants a budget that works their way.