Build a private budget tracker app that never touches your bank
Plenty of people want to track spending without handing a budgeting service the keys to their bank account. A manual budget tracker app does exactly that: you type in what you spend, and it shows where the month went. Anticode builds one that saves everything in your own browser, as in its Tallyhaus template. Here's what it needs and where manual tracking falls short.
Manual tracking: the case for and against
Typing every purchase in sounds like a chore, and it is, slightly. But many people who budget well do it on purpose: the act of recording a coffee is what makes them notice the coffee. Bank-linked apps categorise automatically and are easier to keep up, at the cost of sharing transaction data with a third party and trusting its categories. A manual tracker suits people who want privacy, who mostly spend from one account, or who are trying to change a habit rather than audit the past.
What to put in a budget tracker
- Quick add
- Amount, category and an optional note, from a button that's always visible. Today's date by default. This should take five seconds on a phone.
- Categories
- Eight to twelve is enough for most households: housing, bills, groceries, transport, eating out, health, children, fun, savings, other. Let people rename and add their own.
- Budgets per category
- A monthly limit for each, with a bar showing how much is left. Colour only as a supplement to the number, never the only signal.
- Income
- Salary and other income per month, so the summary shows what's left rather than only what's gone.
- Recurring items
- Rent, subscriptions and bills entered once and added automatically each month, with the option to skip.
- Monthly view
- Spending by category, compared with budget and with last month, plus a simple chart.
- Search and edit
- Find a past entry, fix a typo, delete a duplicate.
Choosing a budgeting method
Tell Anticode which approach you follow, because it changes the screens. A category budget tracks limits per category. A 50/30/20 split groups everything into needs, wants and savings. Zero-based budgeting assigns every unit of income to a category at the start of the month until nothing is left unassigned. Envelope-style budgeting moves money between categories when one runs over. Pick one; a tracker that tries to support all four ends up confusing.
Starting from Tallyhaus
The template gallery includes Tallyhaus, a personal finance dashboard in a dark glass style written by Anticode's model. Using a template copies it into your project with no model call and nothing off your limits. From there, change it in plain words: "switch to 50/30/20 groups", "add a recurring bills list", "show the currency as euros".
To start from nothing, describe your method and categories: "A monthly budget tracker for a couple. Shared categories, a monthly limit for each, recurring bills, quick add from the bottom of the screen, a month summary with a bar per category, CSV export. Pounds sterling." The model writes the whole tracker as one app with the charts drawn in the page.
Privacy and where the data lives
Anticode apps run in a sandbox with no network. A budget tracker built this way has no way to send your spending anywhere, and it can't connect to a bank even if you asked it to. Entries are saved in the browser on the device you use and stay there across visits. The app's own creator can't see them either.
That cuts both ways. Clearing your browser's site data deletes the history, and there's no sync between a phone and a laptop. Ask for an export to CSV, which opens in any spreadsheet, and use it as a monthly backup. An import from the same CSV format could let you move the data to another device by hand; ask for it and test it.
What it can't do
- No bank feeds or receipts scanning. There are no bank connections, and the sandbox has no camera access.
- No sharing between partners' phones. A couple using it must share one device, or each keep their own and compare.
- No live exchange rates. Spending in several currencies needs rates you enter yourself.
- Not financial advice. It adds up what you type in; it doesn't tell you what to do with your money.
- Not a product to sell. If you want to launch a budgeting app with accounts and sync, the Next.js export gives a developer a starting point with a database and sign-in, and real bank connections would then be up to them.
Questions people ask
Is a budget tracker app like this secure?
Nothing leaves your browser, so there's no server copy to leak. Anyone who can use your unlocked device and browser can open it, though, just like any other site you're signed in to.
Can I use it as an expense tracker for a small business?
For one person tracking their own spending, yes. Shared business expenses with approvals need a multi-user tool.
Can I install it on my phone?
Yes. Every published site can be installed on a phone's home screen with its own icon.