*e−mail: h.hrynyk@nltu.edu.ua Received: 19 July 2023; Available online: 20 October 2023 Open access ©2023 The Author(s). http://creativecommons.org/licenses/by/4.0 sylwan 167 (6): 384−396, June 2023 https://doi.org/10.26202/sylwan.2023038 Journal homepage: https://sylwan−journal.pl The SmallForest mobile app was developed for both Android and iPhone operating systems which allows universal use for information exchange within one generalized database. Depending on the account level, users have a specific set of routines, tools and applications for defined activities, namely those that correspond to their account level such as ‘ACTIVE’, ‘OBSERVER’, ‘USER’ or ‘ESTIMATOR’ (excluding the basic version which has limited access to the exchange of attribute and graphical information). The information exchange sys− tem between users of the SmallForest app is provided for the users with account levels ‘OBSERVER’, ‘USER’ and ‘ESTIMATOR’. The information transmission is performed through an intermediate server which provides temporary storage of messages until they are received by the user. As a rule, the provision of the appropriate account level and authorization is carried out by the mobile app administrator after consultation with the authorized persons of the state forestry enterprise. It is prohibited to obtain authorization for a specific access level arbitrarily. It is also possible to view information about authorized users and their access levels. The mobile app is based on a universal database where data exchange and processing is per− formed in accordance with specified and regulated rules and forms. Standardized forms for data input or exchange do not allow the input of unformatted or improperly written information. In addition, the mobile app allows the use of specific routines to input attribute and graphical information, or make changes to existing one. The SmallForest mobile application enables the user to process standardized attribute and vector data, and to perform additional calculations as well. The possibilities of editing the source data related to the forest plot depend on the user access level. This access level is provided by the application manager in agreement with the ABSTRACT CORRESPONDENCE/COMMENTARY SmallForest mobile app: availability, functionality and use Ihor Aleksiiuk (1) , Heorhiy Hrynyk (2, 6)* , Tetiana Dyak (3) , Olena Hrynyk (4, 7) , Andriy Zadorozhnyy (5) (1) State Enterprises ‘Ukrderzhlisproyekt', Troitska 22−24, 08−205b Irpin, Ukraine (2) Department of Dendrometry and Forest Management, Educational and Research Institute of Forestry and Park Management, Ukrainian National Forestry University, Gen. Chuprynki 103, 79−057 Lviv, Ukraine (3) Department of Applied Linguistics, Lviv Polytechnic National University, Mytropolyta Andreia 5, 79−013 Lviv, Ukraine (4) Department of Botany, Dendrology and Non−wood Forest Resources, Educational and Research Institute of Forestry and Park Management, Ukrainian National Forestry University, Gen. Chuprynki 103, 79−057 Lviv, Ukraine (5) Department of Forestry, Geography Faculty, Uzhhorod National University, Universytetska 14, 88−000 Uzhhorod, Ukraine (6) Department of Natural Forest, Forest Research Institute, Park Dyrekcyjny 6, 17−230 Białowieża, Poland (7) Department of Ecology, Forest Research Institute, Braci Leśnej 3, 05−090 Raszyn, Poland ?? *;