3 karte is a free Android app created by Sabiedrības Integrācijas Fonds. The app is designed to help large families in Latvia by providing them with a special ID card, known as the "3+ Family Card," which certifies that the family has three or more children. The card also allows families to receive discounts on various products and services offered by both public and private companies in Latvia.

With 3 karte, families can easily apply for the 3+ Family Card directly from their mobile device. The app guides users through the application process, which includes filling out personal information and providing documentation to verify the number of children in the family. Once approved, users can access their 3+ Family Card directly from the app and start taking advantage of the discounts offered by participating companies.

Overall, 3 karte is a helpful app for Latvian families with three or more children. By simplifying the application process for the 3+ Family Card and providing convenient access to discounts, the app makes it easier for families to save money on essential products and services.