Important: these are apps, not a Trakt-style web service
Trakt provides a web platform, a public API, and a large community that other apps plug into. SeriesGuide, Showly, and Tonkatsu Box are apps you install on your devices, with no equivalent social network or shared API ecosystem.
Important: Showly relies on Trakt
Showly is open source under GPL-3.0, but its repository belongs to the Trakt organization and it integrates tightly with Trakt.tv to sync your history across devices. It is therefore not an independent replacement, because you still use a Trakt account.
Platforms
SeriesGuide is an Android app and does not run on iOS. Showly runs on Android and on iOS since January 2025. Tonkatsu Box is a Flutter app for Windows, Linux, macOS, and Android, and it tracks not only TV and movies but also games, anime, manga, and books.
License details
SeriesGuide is GPL-3.0-or-later, with some parts such as its API library under Apache-2.0. Showly is GPL-3.0, and Tonkatsu Box is MIT.
Maintenance status
All three projects were updated within days of this update. Showly's latest release was 3.61.0 on September 30, 2026, and Tonkatsu Box published v0.45.0 on October 3, 2026, but it is still a young, fast-moving project with version numbers below 1.0.