Build your Expense Splitter with AI in under 5 minutes

Build a Splitwise-style group expense tracker with member avatars, even-split logic, settle-up suggestions that minimize transfers, and per-group balance summaries — generated from a single prompt.

仕組み

ステップ 1

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作りたいものを自然な文章で入力してください。

ステップ 2

AIがビルド

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デプロイして公開

数分以内に専用サブドメインでプロジェクトが公開されます。

開発者を採用する代わりにAIでビルドする理由

FloopFloop従来の開発者
リリースまでの時間5分未満2〜8週間
費用$0から$5,000〜$50,000以上
メンテナンスプランに含まれる継続的な保守契約

What is a expense splitter?

An expense splitter solves the awkward end-of-trip moment when six friends try to figure out who owes whom for shared meals, gas, accommodation. Splitwise pioneered the category and remains dominant; Tricount is the European favourite; Settle Up serves a smaller crowd. The math is simple — sum per person paid, subtract per person owed, find the minimum-transfer solution that settles everyone — and the algorithms are well-published. What matters is the friction: how fast you can add an expense in the moment, how clearly you can see the running balance, and how the settle-up step works when the trip ends. Splitwise's monetization (ads, row caps on the free tier) has alienated the engineer cohort that prefers tools without ad surfaces, especially for a use case that involves personal financial data.

Common features

  • Group creation with named members and avatars
  • Quick expense entry — amount, who paid, how to split
  • Even-split, percentage-split, or shares-split modes
  • Per-member running balance and overall group totals
  • Settle-up suggestion that minimizes total transfers
  • Per-expense category and notes
  • Currency support for international trips
  • Receipt photo attachment per expense
  • Activity feed showing recent additions
  • Export to CSV for personal record

Real-world examples

Travel group

Friends on a multi-day trip. Each person adds expenses as they happen; settle-up at the end of the trip with one Venmo transfer.

Shared household

Roommates splitting rent, utilities, and groceries. Monthly settle-up cycle; per-category breakdown to see where the money goes.

Couple shared finances

Per-purchase splits that respect a 70/30 income split. Running balance reset monthly. Replaces the spreadsheet.

Why FloopFloop fits expense splitter projects

Splitwise's free tier limits the number of expenses you can add per month and the paid tier is more expensive than the trip you're tracking. The data is your own household's financial activity sitting on a third party's servers. FloopFloop lets you ship an expense splitter that doesn't cap anything, has no ads, and keeps the data on your own infrastructure. The settle-up algorithm is the same well-published math; the moment-of-truth (adding an expense fast at the dinner table) is the part you can tune for your group's actual workflow.

試してみてください

以下のプロンプトをコピーしてFloopFloopに貼り付けてお使いください。

Build a Splitwise-style group expense tracker. Multiple groups (Roommates, Weekend Trip, Office Lunch). Each group has members, each expense has a payer, an amount, and a list of people the bill splits between (default: everyone). Balance summary per member (positive = owed, negative = owes). Settle-up view shows the minimum set of transfers that zeros everyone out.

Create a roommates bill-splitting app. Rent, utilities, groceries, and shared subscriptions in one place. Each expense tagged with a category. Monthly summary of total spend per category and who's behind on their share. CSV export of the month so it can be archived after settle-up.

Design a trip expense splitter for a group vacation. Currency selector per expense (USD / EUR / GBP) with a static conversion rate table the user maintains. Per-day spend breakdown. 'Settle up' button generates the smallest list of payments needed to balance everyone out at the end of the trip.

Build an office lunch expense splitter. Recurring weekly lunch group, rotate-the-payer-by-week tracking, automatic monthly settle-up reminder, and a leaderboard of who has paid most this quarter. Print-friendly settle-up sheet for the office whiteboard.

よくある質問

How is this different from Splitwise / Tricount?
Splitwise / Tricount are SaaS apps with a free tier and paywalled features. FloopFloop generates an app you fully own — refine the splitting rules, the categories, the settle-up algorithm, anything. No row caps, no ads, your data lives in your own per-project database. Start from the template and iterate by chat.
How does the settle-up math work?
Each expense credits the payer the full amount and debits each splitter their share (with the last splitter absorbing rounding pennies so cents tie out exactly). Per-member net balance = sum of credits minus sum of debits. The settle-up view uses a greedy algorithm: largest creditor receives from largest debtor until both flatten, repeat. Produces close to the minimum number of transfers for typical group spending — refine with 'use a flow-network solver for proven-optimal transfers' if you need it.
Can splits be uneven?
The default template ships with even-split (everyone in the group pays the same share). Refine with 'add a percent-split mode where each splitter has a weight (Alice 40%, Bob 30%, Carol 30%)' for proportional splits, or 'add an exact-amounts mode where the splitter enters dollar amounts that must sum to the total' for itemized restaurant-style splits.
Where is my data stored?
The default template uses browser localStorage so the app works instantly with no signup. Refine with 'add a Postgres backend so groups sync across devices' to move to server storage — the codegen adds the schema, the API routes, and the sync logic in one round. The codegen scanner blocks every external database (Supabase, Firebase, MongoDB) so the data stays on your own per-tenant Postgres schema.
Can multiple people edit the same group from different devices?
Not in the localStorage-only default — that's per-device. For shared editing refine with 'add a per-group share URL that anyone with the link can read; add a per-group passcode that anyone with it can write'. The codegen generates the route, the access check, and the conflict-resolution logic (last-write-wins is fine for low-contention group expense editing).
Does it handle multiple currencies?
The default template treats every amount as a single currency (dollar-style formatting, integer cents internally to avoid floating-point drift). Refine with 'add a currency column per expense + a user-maintained fx-rates table so each expense displays in its native currency and the settle-up converts to the group's base currency' for a trip-with-international-stops use case.
Can I generate a settle-up email or Venmo link?
Refine with 'add a Venmo deep link (venmo://paycharge?txn=pay&recipients=USERNAME&amount=AMOUNT&note=NOTE) on every settle-up row so tapping it opens the Venmo app pre-filled'. The codegen wires the deep link and the share intent. Email refining works the same way — 'email each member the settle-up sheet via Resend' adds the route and the template.

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