CrimLib Справочник следователя is a free educational reference application available for Android. Developed by CrimLib.info, the app provides a wealth of information on the tactical-technical features of investigative searches, algorithms for describing objects in investigation protocols, a list of objects, tasks and typical questions for forensic examinations, standard question systems for interrogations, methodological recommendations for investigating crimes of various categories, problematic issues in qualifying different types of crimes, templates and examples for filling out basic procedural documents, and a compass and system for registering geographical coordinates to orient oneself at incident sites located beyond the boundaries of populated areas.

The app requires a one-time download of the database via Wi-Fi or mobile network on first use. Most of the illustrative material and texts in the app were created and updated specifically for it, and comply with the norms of Russian legislation. The app also provides quick access to the CrimLib.info website, an encyclopedia and library of criminology and criminal procedure. Furthermore, the app has a search system for basic terms and sections, and bookmarking feature to quickly return to the necessary material.

Overall, CrimLib Справочник следователя is an excellent assistant for practicing investigators and interrogators, as well as for anyone interested in mastering this profession.