Privacy policy

Effective 11 November 2026. Applies to the Gain & Loss app for iPhone and Android.

In short: your trades stay on your phone. To get prices, the app sends only stock symbols (such as 0700.HK or AAPL) and currency pairs to our server. There are no accounts, no analytics, no advertising and no tracking.

What stays on your phone

The stock codes, quantities, dates, prices, fees and notes you enter, the last prices fetched, and your settings are stored in the app's own storage on your phone. They are never sent anywhere. Delete the app to remove them.

Getting prices

To show names and prices, the app sends our server the symbols of the stocks you hold or are looking up, and the currency pairs needed for your totals (such as USDHKD). It does not send quantities, prices you paid, dates or any identifier. Our server is a Cloudflare Worker run by the developer. It asks Yahoo Finance for the prices, keeps each price for about a minute so others asking for the same stock get it faster, and stores nothing else. As with any internet request, Cloudflare and Yahoo can see your device's IP address.

Excel export and import

An export is created on your phone and handed to the share sheet; it goes only where you send it. An import reads only the file you pick.

What we collect

We don't collect personal data. We don't sell or share anything, and the app contains no third-party analytics or advertising code.

Children

The app isn't directed at children and collects no personal data from anyone.

Changes

If this policy changes, the new version will be posted on this page with a new effective date.