Skip to content
This page is also available in your language. Switch

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 →

Compound Interest Calculator

Use this compound interest calculator to see how interest on interest makes a lump sum and regular contributions grow.

My tools →
%
–
Final balance
–
Total deposited
–
Total interest

Year Total deposited Total interest Balance
Runs in your browser – your data never leaves your device Also available via our free API

How to use the Compound Interest Calculator

  1. 1 Enter the starting amount, the annual interest rate and the number of years.
  2. 2 Optionally add a monthly deposit and choose how often interest is added.
  3. 3 Read the final balance, the total interest and the year-by-year overview.

Why compound interest is so powerful

Compound growth starts slowly and then accelerates. With €10,000, €200 a month and 5% interest compounded monthly, you deposit €58,000 over 20 years – but the balance grows to well over €100,000. In the last years the interest you earn each year is larger than everything you deposit.

Time matters more than amount

Starting ten years earlier often beats depositing twice as much later, because early money has more time to compound. That is why regular saving or investing from a young age is so effective.

Compounding frequency

Daily compounding earns slightly more than monthly, monthly slightly more than yearly. The differences are small at low rates, but they add up over decades – compare the effective annual rate shown under the result.

Frequently asked questions

How do I calculate compound interest?

Use A = P × (1 + r/n)^(n·t) for a lump sum. For regular deposits, each deposit compounds from the moment it is made – the calculator does this month by month.

Is daily compounding much better than monthly?

Only slightly. At 5%, monthly compounding gives an effective rate of 5.12% and daily compounding 5.13%.

Last updated: