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Sync settings

Choose what your account keeps in step on every device where you are signed in.

  • My tools

    Always synced: the tools on your board, their order and size.

  • The windows open on your start page, including what you typed in them.

  • Every note in the notepad – on the notepad page, on your board and in windows.

  • Every list of website shortcuts – on the shortcuts page, on your board and in windows.

  • Every grid in the cover grid maker – on its page, on your board and in windows.

  • Every list of bookmarked organisations in the OIN lookup – on its page, on your board and in windows.

  • Keeps your pipeline and saved recipes on all your devices. Your files are never synced – only the steps and settings.

Turning something off removes it from your account straight away. Your devices keep their own copy.

Notifications

Tools that can tell you about something new while a Synsi tab is open, even when you are in another tab or app. Choose them for this browser.

This browser cannot show notifications from websites.
Notifications are blocked for this site. Allow them in your browser’s site settings (the icon left of the address), then switch them on here.

  • Says “New message” while a Synsi tab is open – never who wrote it or what.

Your choice is stored in this browser only. Notifications never show personal content such as a message or a number. They work while a Synsi tab is open; closed tabs get none.

Browse all tools →

Credit Card Interest Calculator

Estimate credit card interest and remaining balance over a selected number of months.

My tools →
%
months

Estimated first-month interest

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Interest over projection

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Estimated remaining balance

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Months simulated

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Uses APR divided by 365 with 30 days of daily compounding each month, then applies the payment. Issuers can use different billing-cycle and balance methods; excludes new purchases and fees.

Runs in your browser – your data never leaves your device Also available via our free API

How to use the Credit Card Interest Calculator

  1. 1 Enter the values requested by the calculator.
  2. 2 Review the result and the assumptions shown with it.

How this calculator works

Estimate credit card interest and remaining balance over a selected number of months.

Assumptions and limitations

Uses APR divided by 365 with 30 days of daily compounding each month, then applies the payment. Issuers can use different billing-cycle and balance methods; excludes new purchases and fees.

Further reading: Consumer Financial Protection Bureau: Daily periodic rate.

Frequently asked questions

How is this estimate calculated?

Estimate credit card interest and remaining balance over a selected number of months.

What should I keep in mind?

Uses APR divided by 365 with 30 days of daily compounding each month, then applies the payment. Issuers can use different billing-cycle and balance methods; excludes new purchases and fees.

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