In short
CoinBox has no accounts: no name, email or password is needed. Your transactions, accounts, budgets and other records are stored on your iPhone.
Data leaves your device only when you use AI features yourself — voice or text expense entry and the AI spending audit.
The app has no ads and no advertising trackers. We don’t sell your data or share it for advertising.
Data on your device
Everything you enter in CoinBox is stored on your iPhone. CoinBox does not sync your data to our server. If you back up your iPhone to iCloud or a computer, the app’s data may be included in that backup.
Backups, Excel and CSV files are created by you and saved wherever you choose.
AI features
When you add an expense by voice or text, the phrase and your category names are sent to our server to recognize the amount, category and currency.
The AI spending audit runs only with your consent and sends an aggregated summary of your spending, not your full list of transactions, accounts or balances.
Requests are processed using OpenAI models. We don’t pass your name, email or contacts along with them, and we don’t store the content of your requests.
Other network requests
The app loads exchange rates, investment prices and service logos from public sources and our server. Only currency codes, tickers or web addresses are sent.
Feedback
If you contact us via “Ask a question” in Settings, we receive your message, the email you enter and basic technical details about the app and device. We use them only to reply.
If you write through the website form, we receive your message, the email you enter and the page language; it reaches us through an email delivery service. We use this only to reply.
This website
coinbox.dev has no analytics, ads or third-party scripts. If you pick a language by hand, the site saves a “lang” cookie containing only the language code, so it opens in that language next time.
To protect the contact form from spam, the server keeps a hash of your IP address in memory for up to a day. Like any web server, it may keep technical request logs (IP address, browser) for security and troubleshooting.
Deleting your data
You can erase all records in Settings → “Delete all data”. Deleting the app also removes its data from your device.
Changes and contact
If this policy changes, we will update this page. For any questions, use the website form or “Ask a question” in CoinBox Settings.