Is it mandatory to have the «Reserve+» application on your smartphone during martial law in Ukraine?

Amid the ongoing martial law in Ukraine and the widespread mobilization, the question of whether it is obligatory to install and use the «Reserve+» mobile application becomes increasingly relevant.
Official authorities and officials often emphasize that having this application on a smartphone can significantly facilitate interactions between reservists and relevant military structures.
Legal experts, including Alexandra Kapitula from the law firm «Murenko, Kuryavy and Partners», clarify that Ukrainian legislation does not explicitly require conscripts or reservists to install this app.
Nonetheless, practice shows that some authorities insist on its presence, as it allows for quick and efficient updating of military registration data, submitting deferment requests, or changing registration addresses directly through the app.
This approach helps reduce the time needed for communication with the military registration and enlistment offices (TЦК) and saves from lengthy paperwork, simplifying the process of data management and interaction.
The law provides users with the ability to find out whether they are registered, access their personal data in electronic cabinets, and correct inaccuracies.
However, the expert stresses that the legislation does not impose a mandatory requirement for reservists or recruits to have such digital accounts or applications, though using these tools greatly streamlines duties and ensures faster access to crucial information, which is especially important during active mobilization.