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How to Make a Budget App Without Coding
How to make a budget app: the features to build first, which budgeting method to use, bank sync costs, store rules for finance apps, and copy-paste prompts.
Nafis Amiri
Co-Founder of CatDoes
To make a budget app, pick one budgeting method and build five screens around it: this month's budget, add transaction, transactions, reports and settings. Give each user a private login so their data syncs. Start with manual entry and CSV import, then add bank sync. With CatDoes, you describe it in plain English and get it on iPhone and Android.
Below are the exact prompts to build one, a zero-based budget app we'll call Kitty, step by step. You'll also see which features belong in version one, what bank sync costs, the App Store and Google Play rules finance apps run into, and what a launch costs.
TL;DR: Decide on a budgeting method first (zero-based, envelope, 50/30/20 or paycheck planning), because it shapes the database. Version one needs sign-up, a monthly budget by category, fast transaction entry, a transaction list, reports, recurring bills, CSV import and in-app account deletion. Skip bank sync until people ask for it. Building and publishing with CatDoes Starter costs $724 in the first year including both store fees, against a $90,780 average app project on Clutch.
Table of Contents
Are You Building a Budget App for Yourself or to Sell?
What Features Does a Budget App Need?
Which Budgeting Method Should Your App Use?
The Data Model Behind a Budget App
How to Make a Budget App With CatDoes, Step by Step
Should Your Budget App Connect to Bank Accounts?
App Store and Google Play Rules for Finance Apps
How Much Does It Cost to Make a Budget App?
Frequently Asked Questions
Start With Last Month's Spending
Are You Building a Budget App for Yourself or to Sell?
Answer this first, because it changes what you build and how you publish it. A budget app for yourself only has to fit your own rules. A budget app you sell has to fit strangers, pass store review and compete on price.
If it's for you, the reason is usually that nothing on the market fits. In a Reddit thread on r/budgetingforbeginners, one person who built their own said the apps they tried "wanted my bank login, showed ads, or felt like they were monetizing my data," and spreadsheets "felt too messy and exhausting." If that sounds like you, build it. If it doesn't, an existing app costs less (see the cost section).
If you want to sell it, the demand is real. FINRA Foundation's 2024 National Financial Capability Study found 42% of US adults use websites or apps for financial tasks such as budgeting, rising to 56% of 18- to 34-year-olds. And Mint, one of the best-known free budget apps, is gone: Intuit shut it down in early 2024 and moved its users to Credit Karma. YNAB charges $109 a year, so a budget app built for one group, say freelancers or couples, has room to charge too. Still choosing between ideas? See our mobile app ideas worth building in 2026.
What Features Does a Budget App Need?
A budget app needs eight features in version one: sign-up with private data, a monthly budget by category, fast transaction entry, a transaction list, reports, recurring bills, CSV import and export, and account deletion. Everything else can wait for users to ask.
Feature | What it does | When |
|---|---|---|
Sign-up and private data | Each user sees only their own budget, synced across phones | Version 1 |
Monthly budget by category | Budgeted, spent and remaining for every category | Version 1 |
Fast transaction entry | Amount, category, date and note in a few taps | Version 1 |
Transaction list and search | Grouped by day, with edit and delete | Version 1 |
Reports | Spending by category and month over month | Version 1 |
Recurring bills and reminders | Rent, phone and subscriptions added on their due date | Version 1 |
CSV import and export | Brings in history from a bank export and lets users take their data out | Version 1 |
Account deletion and privacy policy | Required by Apple and Google Play for any app with sign-up | Version 1 |
Savings goals | A target and a date, with the monthly amount needed | Later |
Shared budgets | Partners or a household on one budget | Later |
Bank sync | Pulls transactions in automatically through a bank data provider | Later |
AI categorization and receipt scanning | Suggests a category, reads totals from a receipt photo | Later |
CSV import comes before bank sync on purpose. It gets months of history into the app in one go, works with any bank that offers an export, and doesn't ask anyone for a bank password. That's the trade the people in that Reddit thread wanted.
Speed of entry matters more than any chart. If adding a coffee takes longer than ten seconds, people stop logging, and a budget app with missing transactions is worse than none. Put the amount field first and open the number pad straight away.
Which Budgeting Method Should Your App Use?
Pick one budgeting method before you build, because it decides what your database stores. YNAB and EveryDollar are built on zero-based budgeting, and Goodbudget is built on envelopes.
Method | The rule | What the app has to store |
|---|---|---|
Zero-based | Assign every dollar of income to a category until nothing is left to assign | An assigned amount per category per month, plus a running "left to assign" total |
Envelope | Fill envelopes when you're paid and spend only what's inside each one | An envelope balance that carries over, and transfers between envelopes |
50/30/20 | 50% of income to needs, 30% to wants, 20% to savings | A need, want or saving tag on every category, and income per month |
Paycheck planning | Cover every bill due before the next payday from the current paycheck | Pay dates and bill due dates, so the app can match them |
YNAB describes its version in one line: "Give every dollar a job." Kitty, the example app in the walkthrough below, uses zero-based budgeting with rollover, so money left in a category carries into next month. You can support a second method later, but launching with two doubles the screens you have to get right.
The Data Model Behind a Budget App
A zero-based budget app runs on five tables. Knowing them helps you check the plan an AI app builder writes, or brief a developer, without guessing.
Table | Main fields | Why it exists |
|---|---|---|
Profiles | Currency, the day the month starts | Not everyone's month starts on the 1st. Many people budget from payday |
Categories | Name, group, sort order, archived | Archive instead of deleting, so old transactions keep their category |
Monthly budgets | Category, month, assigned amount | One row per category per month makes rollover and history simple |
Transactions | Amount, date, income or expense, category, note, source | "Source" (manual, CSV or bank) lets you spot and skip duplicates on import |
Recurring bills | Amount, category, due day, next date, reminder on or off | The app creates the transaction on the due date and sends the reminder |
Three rules keep the numbers right. Store money as whole cents, not decimals, so totals never drift by a cent. Calculate "spent" and "remaining" from transactions instead of saving them, so they can't fall out of sync. Tag every row with the user's ID, and have the database refuse to return rows that belong to someone else.
How to Make a Budget App With CatDoes, Step by Step
Here's how to build Kitty with CatDoes, from the first prompt to the app running on your phone. Each step has the message to send and what to check before moving on. If you've never built an app without code, our guide to building a mobile app without coding covers the basics first.
Step 1: Plan the app before building anything
Switch the effort selector to High (it needs a balance above 100 credits; on the Free plan, stay on Medium) and send a plan request. Starting with "Don't build anything yet" puts CatDoes in plan mode: it writes the plan and waits for your go-ahead. That matters because, in the docs' words, "Changing a plan is free. Changing built work costs credits." Send this prompt, changing the name and categories to your own:
"Don't build anything yet. I want a personal budget app for iPhone and Android called Kitty. It uses zero-based budgeting: each month I assign all my income to categories until 'Left to assign' is $0. Screens: 1. Sign up and log in with email. 2. This Month: income, Left to assign, and every category with budgeted, spent and remaining. A progress bar per category turns red when I overspend. 3. Add Transaction: amount first with a number pad, then expense or income, category, date and an optional note. Adding one should take under 10 seconds. 4. Transactions: grouped by day, with search, and swipe to edit or delete. 5. Reports: a donut chart of this month's spending by category and a bar chart of the last 6 months. 6. Settings: currency, the day my month starts, manage categories, export to CSV, a link to the privacy policy, and Delete my account. Start with these categories: Rent, Groceries, Transport, Bills, Eating Out, Fun, Savings. Unspent money in a category rolls over to next month. Store everything in CatDoes Cloud so each user only ever sees their own data. Calm, clean design: green when on track, red when overspent. Show me the plan: screens, data model and anything you'd change."
Read the plan before you approve it. Check the tables against the five in the data model above, and look for the two rules that matter most: money stored as whole cents, and each user locked to their own rows. If anything is missing, say so now, while changes are still free.
Step 2: Build it and check the live preview
Switch to Medium and reply "Looks good, build it." That's the split CatDoes' docs recommend: High or Max to plan, Low or Medium to build. The preview updates in the browser while the agent works.
When it's done, set an income and a few category budgets, then add 8 to 10 sample transactions. Overspend one category on purpose. You're checking three things: the bar turns red, "Left to assign" goes down as you budget, and the donut chart matches the transaction list.
If something is wrong, describe what you see, not how to fix it. "Groceries shows $0 spent but I added two grocery expenses" gets a better fix than a guess at the code.
Step 3: Check the database in CatDoes Cloud
Open the Cloud tab to see the tables CatDoes created. CatDoes Cloud is included on every plan and covers the database, logins, file storage and edge functions, so you don't set up a separate backend.
Then sign up with a second test account and confirm it can't see the first account's transactions. This is the one check you shouldn't skip in a finance app.
Step 4: Add recurring bills and CSV import
Add features one message at a time, so each change is easy to check and easy to roll back. CatDoes saves a checkpoint for every message, and "Rewind to here" takes the app back to before any of them. Database changes in Cloud aren't reverted that way, so check those yourself. Then send these two follow-ups, one at a time:
"Add recurring bills. I set rent, phone and subscriptions once, and they're added as transactions on their due date every month. Send me a reminder notification the day before."
"Add CSV import so I can upload my bank's export, map the columns to date, amount and description, and pick a category for each row before saving."
Test the import with a real export from your own bank, not a file you typed up. Banks disagree on date formats and on whether spending is a negative number, and that's where imports break.
Step 5: Test it on your phone
Click "Preview on mobile" and scan the QR code. The app opens in Expo Go on your iPhone or Android phone, so you can log real spending for a few days before anyone else sees it.
Use it one-handed, the way people actually log a coffee. If the number pad doesn't open on its own or the save button sits out of thumb reach, ask for the change now.
Step 6: Run the review check and publish
Before you submit, run "Check If Your App Is Ready for Review." It checks the app against App Store and Google Play guidelines and returns a verdict, blocking issues and warnings. It's optional and uses credits.
Fix the blocking issues first, then read the warnings against the store rules section below. Publishing to the stores needs the Starter plan or above. For iOS, you can ask the agent to submit the app to the App Store, then choose TestFlight or a public release in App Store Connect. For Android, you download the build and upload it to Google Play yourself. Store builds take 10 to 30 minutes.
Should Your Budget App Connect to Bank Accounts?
Not in version one, for most budget apps. Bank sync means a monthly fee per connected account and a backend to hold your API secret, and it puts the app in a tougher spot in App Store review. Manual entry plus CSV import works with every bank on day one. Our advice: ship without it, and add it when users ask.
When users do ask for it, these are the options as of October 2026:
Option | What it costs | Good to know |
|---|---|---|
Manual entry | Free | Works with any bank and shares nothing. Users have to log every expense |
CSV import | Free | Months of history at once, but no live updates |
Plaid Transactions | Sandbox is free. Trial plans include up to 10 free Items in production, then a monthly fee per connected Item | Trial is for US and Canada teams created on or after April 15, 2026. Up to 24 months of history |
Teller | Free for independent developers and prototypes, including 100 live connections. Paid transactions cost $0.30 per enrollment per month | Developer API with published per-use prices |
SimpleFIN Bridge | The user pays $1.50 a month or $15 a year | Users connect their own banks and give your app a token. The open-source Actual Budget uses it |
GoCardless Bank Account Data | New signups are currently disabled | Covers EU and UK banks. Actual Budget's docs also list it as closed to new accounts |
Plaid's pricing page still mentions its old Limited Production plan, but its billing docs say Trial plans replaced it for new teams. Check both before you plan costs around it.
Whichever provider you pick, the API secret must never ship inside the app, where anyone can pull it out. In CatDoes, save it in the Cloud tab's Secrets and ask the agent to call the bank API from an edge function. If you paste keys in chat, use Secure Input, which the docs say is "encrypted end-to-end and never visible to the AI."
App Store and Google Play Rules for Finance Apps
Budget apps run into four store rules that other apps mostly don't: who is allowed to submit, account deletion, privacy disclosures, and Google Play's financial features declaration. The top-ranking guides for this search skip them.
Apple: who can submit a finance app
Apple's App Review Guidelines (updated October 16, 2026) say in 5.1.1(ix) that apps "in highly regulated fields (such as banking and financial services...) or that require sensitive user information should be submitted by a legal entity that provides the services, and not by an individual developer." Guideline 3.2.1(viii) adds that apps "used for financial trading, investing, or money management should be submitted by the financial institution."
Apple doesn't say where a budget tracker falls. Our reading: a manual budget app that never holds or moves money is the lowest-risk case. Bank sync makes it more exposed because the app now handles bank data. If you add bank sync or plan to sell the app, enroll as an organization instead of an individual. Our Apple Developer account setup guide covers the D-U-N-S number that organization enrollment needs.
Both stores: account deletion and a privacy policy
Apple's guideline 5.1.1(v) is direct: "If your app supports account creation, you must also offer account deletion within the app." Google Play requires an in-app path to delete the account and its data, plus a web link where users can request deletion. Apple also requires a privacy policy link both in App Store Connect and inside the app. Build all three into Settings from the start, as the Kitty prompt does.
Google Play: the financial features declaration
Every app on Google Play has to complete the Financial features declaration in Play Console. Google is explicit: "Even developers with apps that do not offer any financial features must complete this form." Since October 30, 2025, Google has blocked updates to apps whose developers haven't filled it in. There's no "budgeting" category in the form, so read the options and pick the one that matches what your app does.
Two more Google rules catch first-time publishers. Personal developer accounts created after November 13, 2023 must run a closed test with at least 12 testers for 14 days before going to production. The account costs a one-time $25. Apple's developer program is $99 a year.
How Much Does It Cost to Make a Budget App?
A budget app costs $724 for the first year when you build and publish it with CatDoes, or $628 with yearly billing. Hiring out is far more expensive: Clutch reports most app projects land between $10,000 and $49,999, with an average of $90,780 and about 11 months of work.
Item | Cost |
|---|---|
CatDoes Starter (needed to publish to the App Store and Google Play) | $50 a month, or $42 a month billed yearly |
Apple Developer Program | $99 a year |
Google Play developer account | $25 once |
Bank sync (optional) | Depends on the provider (see the table above) |
First year, without bank sync | $724 monthly billing, $628 yearly billing |
Starter includes 200 credits a month. How far they go depends on how many changes you ask for, which is why fixing the plan before building pays off. If you run out, extra credits cost $30 per 100.
If you only want a budget for yourself, be honest about the comparison. YNAB costs $109 a year, Monarch Core $99.99 and EveryDollar Premium $79.99, and all three are finished products. Building your own pays off when none of them fits how you budget, or when you plan to sell the app. The same cost logic applies to creating an app for your business.
Frequently Asked Questions
How much does it cost to create a budget app?
With an AI app builder, about $724 in the first year: CatDoes Starter at $50 a month, Apple's $99 yearly fee and Google Play's $25 one-time fee. An agency costs far more. Clutch puts the average app project at $90,780, and most land between $10,000 and $49,999.
Can I make a budget app for free?
You can start for free. CatDoes' Free plan gives 15 one-time credits and publishes to the web with a CatDoes badge. How far those credits go depends on how much you ask for. Publishing to the App Store and Google Play needs the Starter plan and both developer accounts.
Do I need to know how to code to make a budget app?
No. With CatDoes you describe the screens and rules in plain English, and the agent writes the app, sets up the database and logins, and fixes errors when you describe them. Knowing the data model above still helps, because it lets you check that the plan the agent writes stores your numbers correctly.
How long does it take to make a budget app?
It depends on how many features you add and how long you test. Agency projects typically run about 11 months, according to Clutch. With CatDoes, store builds take 10 to 30 minutes. If you have a new personal Google Play account, add 14 days for the required closed test with 12 testers before the app can go live.
Is YNAB really worth it?
YNAB costs $14.99 a month or $109 a year, with a 34-day free trial. It's worth it if you'll follow zero-based budgeting and check in every few days. If you won't, a free option like Goodbudget's free plan (20 envelopes, one account) or a spreadsheet will do the job.
What are the best budget apps out there?
Well-known options include YNAB ($109 a year, zero-based), Monarch (Core at $99.99 a year) and EveryDollar (free, or $79.99 a year for Premium with bank connections). Goodbudget has a free envelope plan. Actual Budget is free, open source and stores your data locally first.
How can I create a budget?
Add up last month's take-home pay, then list fixed bills like rent and insurance. Give the rest to categories such as groceries, transport, fun and savings until income minus spending equals zero. Track every expense for a month, then adjust the categories that ran over.
Start With Last Month's Spending
To make a budget app that people keep using, start from real spending, not a feature list. Pull last month's transactions from your bank, sort them into seven or eight categories, and use those as the defaults in your prompt. Then send it to CatDoes with "Don't build anything yet" and fix the plan before you build.
Start building my budget app on CatDoes and test the first version on your own phone.
Nafis Amiri
Co-Founder of CatDoes
