In mid-June 2026, BATorrent released version 4.0, a lightweight BitTorrent client developed with C++, Qt 6, and libtorrent-rasterbar. The source code is available on GitHub under the MIT license, with builds for Windows, Linux, and macOS. Key features include support for magnet links, resumable downloads, sequential downloading, customizable file priorities, and an automatic RSS download feature. The client prioritizes user privacy with no telemetry or analytics, and the only outgoing request is a release check on GitHub. The user interface includes three themes, a real-time speed graph, a detailed tabbed panel, drag-and-drop support, and multilingual options. Privacy features include a PT mode for anonymous connections and a one-click Tor proxy setup. Notifications are integrated with Telegram and Discord, and key improvements in versions 4.0 and 4.1 include an interactive tour, automatic launch after updates, refined protection against automatic updates, and the ability to add torrents via URL.