iCost is iOS-only and has no export. Can my data still move?

Yes. iCost has no usable export right now, so use screenshots instead: capture the transaction screens, have ChatGPT turn them into a CSV with fixed columns, then upload it below to preview.

What does the CSV from ChatGPT look like?

Six fixed columns: date, category, amount, description, currency and kind, with kind set to expense or income. There's an example below, and Futari recognises the file from those columns when you upload it.

iCost has in-app purchases. What about Futari?

Today the core ledger in Futari is free and ad-free, and import costs nothing.

My partner is on Android — can we still share it?

Yes. Futari is a cross-platform PWA — iOS, Android and the browser — so two people on different phones share one ledger.

Futari

← Back to Futari

繁中简中EN日本語

ICOST → FUTARI

Your iCost data can come with you

iCost is iOS-only — want to log across phones as two? A screenshot + ChatGPT turns your records into a CSV to move into Futari.

Why Futari

Two people, across platforms
iCost is iOS-only; Futari runs on iOS, Android and the web, so it doesn’t matter what phone your partner uses.
Shared costs, sorted per entry
Mark who paid and how it's split on each entry, and the balance stays current; no separate spreadsheet needed.
Free on every platform
iCost has in-app purchases. In Futari the core ledger is free and ad-free, whether you use iOS, Android or a browser.

You can start without moving anything

Bring the old records over whenever you feel like it — the importer waits in settings once you sign in. Today’s first entry is a fine place to begin.

Create a Futari account

Moving from iCost in three steps

On your iPhone, open iCost and screenshot the transactions you want to move (full how-to below).
Hand the screenshots from your iPhone to ChatGPT to turn into a CSV; a copy-ready prompt is below.
Upload the CSV here and preview it, then create an account to finish; your partner can join from an iPhone or an Android phone.

No CSV export? Use screenshotsFour steps, with a stop at ChatGPT along the way.

If your old app has no CSV export, you can screenshot your records and have ChatGPT turn them into a CSV to upload. The free ChatGPT plan works.

In your old app, scroll your transaction list and take phone screenshots (5–10 is a good range to cover the period you want to move).
Open ChatGPT, upload all the screenshots at once, and paste the prompt below.
Copy the whole ```csv code block ChatGPT returns and save it as xxx.csv in any plain-text editor.
Come back here, upload that csv, preview it, and create an account to finish the import.

Prompt to paste into ChatGPT

You are my bookkeeping data assistant. I will upload screenshots from a budgeting app. Please turn every transaction shown into CSV format.

Requirements:
- The first CSV row is the header: date,category,amount,description,currency,kind
- Use YYYY-MM-DD for date; if a screenshot only shows month/day (e.g. 5/30), assume the current year
- Use a positive integer for amount (no minus sign, no decimals); if it was shown as an expense or in red / with a minus sign, set kind to "expense"; if it was income or in green, set kind to "income"
- Keep the original category text from the screenshot (Chinese or English, as-is)
- Keep the merchant name or note text in description; leave it blank if there is none
- Use an ISO 4217 three-letter code for currency (TWD / USD / JPY / CNY…); default to TWD if the screenshot does not show one
- If the same transaction (same date + amount + description) appears across multiple screenshots, keep only one
- Output the CSV inside a single ```csv code block only, with no explanatory text before or after

I will upload the screenshots once you confirm.

The CSV will look like this

date,category,amount,description,currency,kind
2026-05-30,Food,150,Starbucks,TWD,expense
2026-05-30,Salary,50000,May,TWD,income

Non-TWD rows import at their raw number first; you can adjust the conversion per row after import. The prompt asks ChatGPT to keep just one copy of any entry that appears twice (same date + amount + description); Futari doesn't remove duplicates on import, so import each file only once.

No rush — you can import the CSV from settings any time after you sign in.

Drop your CSV here, or pick a file

Choose CSV

.CSVParsed in your browser. Nothing is uploaded.

Preview runs in your browser. Nothing leaves your device.

Futari vs iCost

	Futari	iCost
Shared ledger for two	Default mode	Built for one
Ways to split costs	Multiple modes	None
Cross-platform	iOS / Android / Web	iOS only
Completely free	Forever	In-app purchases
Data export	CSV: expenses, income, settlements	No export

Frequently asked

iCost is iOS-only and has no export. Can my data still move?: Yes. iCost has no usable export right now, so use screenshots instead: capture the transaction screens, have ChatGPT turn them into a CSV with fixed columns, then upload it below to preview.
What does the CSV from ChatGPT look like?: Six fixed columns: date, category, amount, description, currency and kind, with kind set to expense or income. There's an example below, and Futari recognises the file from those columns when you upload it.
iCost has in-app purchases. What about Futari?: Today the core ledger in Futari is free and ad-free, and import costs nothing.
My partner is on Android — can we still share it?: Yes. Futari is a cross-platform PWA — iOS, Android and the browser — so two people on different phones share one ledger.

Coming from another app?

Why this is safe to do

Open only to you two
Only your two accounts can open the ledger. Connections are encrypted over HTTPS, and sensitive details are stored encrypted.
Yours to take back
Export your expenses, income and settlements as CSV any time. Moving here doesn't lock you in.
Free for the long haul
The core ledger stays free. We do not run ads or sell data.