Mark on the map the countries and cities you visited. A simple and pleasant design, nothing more.

Tap to select the country, double tap to mark it. One tap on city to mark it. When you select the country, its name appears on the top. At the bottom, you will see the total number of visited countries and cities.
Long press - add the note about country.

The app can automatically detect when you move to a new country and sends you a reminding push-notification to mark it as visited. (You should allow background geolocation). Don't worry, it doesn’t consume too much battery because the app tracks only significant movements.

Very helpful for travellers or business people who fly a lot. Also by this app you can learn geography.