The "Въезд в РФ - Проверка по Базам" app is a free travel and navigation application available on Android. The app is developed by Официальные системы and aims to provide users with an online verification of their entry ban into the Russian Federation.

The app checks the Federal Migration Service (FMS), the Ministry of Internal Affairs (MIA), and the Federal Bailiff Service (FBS) databases to determine if there are any restrictions on the user's entry into Russia. Users must provide their full name, document number and series, and select their nationality to initiate the verification process. The app provides a preliminary response for free, with a detailed and accurate report available for a fee.

It's worth noting that the preliminary response from the FMS is only informative, and a full report requires payment to access the official migration database of the Russian Federation. The app is available in multiple languages for ease of use.