To exercise your privileges to fly as pilot in command, you need to complete a flight review every 24 calendar months. They used to be called BFRs, or "biennial flight reviews," by the FAA. However, they removed the word "biennial", because they want to encourage pilots to train with a CFI more often than once every 2 years, which is a good idea for any GA pilot.
Price for Flight Review: 1500 SEK / 150 EUROS (done in owner aircraft)
If you don't own an aircraft but still need a flight review you can do it in my DA42. Please contact me for the exact price. Duration: 1 Day