This is the 946th most frequent Czech word.
mobilní
The Czech word "mobilní" means "mobile" or "portable" in English.
Here, 'mobilní' is used as an adjective describing 'aplikace' (application), denoting its nature as related to mobile technology.
Tato mobilní aplikace je velmi populární.
This mobile application is very popular.
In this case, 'mobilní' again functions as an adjective, qualifying 'telefon' (phone) to denote its feature of being portable or mobile.
Mobilní telefon se stal nepostradatelnou součástí naší každodenní rutiny.
The mobile phone has become an indispensable part of our daily routine.
Here, 'mobilní' describes 'služby' (services) to indicate they are adaptable and not fixed to a single location, implying flexibility in their usage.