Sim Contact Tool-Export/Import

Samsung Smart Switch Mobile allows transferring contacts, photos, music, messages and other data between Galaxy devices, as well as from other Android and iOS devices, but often requires Wi-Fi connection and suffers from compatibility issues and instability.

An app for parallel reading of books in two languages (original + translation) with built-in translator, dictionary, and voice playback support for learning foreign languages through natural reading.

Free offline navigation and place search app using OpenStreetMap maps without internet connection, featuring turn-by-turn voice navigation, route recording, and support for walking, cycling, and driving routes.

An app for creating and managing reminders with voice input support, location-based reminders, and offline functionality, but with unreliable notifications and frequent issues after updates.

HabitKit is a habit-tracking app that displays daily progress as grid charts and supports reminders, calendars, and data export/import, but limited by a 4-habit free tier, cloud sync unavailability, and payment issues for Russian users.

KeePassDX is a local password manager for Android supporting KeePass formats, biometric authentication and TOTP/HOTP, without requiring internet connection or cloud synchronization.

Offline password manager with AES-256 encryption, enabling secure storage of passwords, cards and logins on your device without internet access and without ads.

An app for recording GPS tracks with offline maps, supporting GPX/KML/KMZ import/export, route building, and altitude and speed data analysis. Primarily used by hikers and hunters for navigation in the field without internet access.