Kozi is designed to replace your media server, your download stack, and the headaches that come with both. Here's everything it does.
Making the switch
Sonarr, Radarr, Prowlarr, Jackett — gone. Kozi has a fully integrated download orchestrator that handles searching, tracking, downloading, and organizing your media from one place. New episodes are automatically tracked and downloaded. Movies are queued in a few clicks. Everything lands exactly where it should, properly named and organized.
No more juggling four separate apps with four separate config files. No more debugging why Sonarr can't talk to your download client. One app. One config. It just works.
Switching to Kozi doesn't mean starting over. Import your existing library metadata, watch history, and user accounts from Plex, Jellyfin, or Emby with a single click. You won't have to manually fix metadata on your DVD rips or set up all your users again.
Your watch progress, your users, your carefully curated metadata — it all comes with you.
Kozi automatically detects intro sequences, recaps, and end credits across your entire library — no manual tagging or third-party plugins required. When you're bingeing a series, the intro skips automatically. You've seen the title card. You know who makes the show. Let's get on with it.
Kozi can convert your whole library to a unified, universally-playable format in the background. This means instant playback on every device with no real-time transcoding required — and dramatically faster downloads when syncing media to your phone or tablet.
But that's not all. Pre-optimize also auto-generates precise subtitle files matched to your exact media files — not generic ones from the internet. And it auto-levels the volume across your entire library so you can stop having to play DJ with the remote every time you switch shows.
Set it up once. Let Kozi handle the rest while you sleep.
Kozi is not a fork of Jellyfin, Emby, or anything else. It's a ground-up build in Go — a language built for performance, concurrency, and low resource usage. That means faster scans, snappier responses, and less strain on your hardware. It's a modern architecture designed for modern home media setups.
Kozi launches with dedicated apps for Web, Android, iPhone, Apple TV, Android TV, and Amazon Fire Stick. Every app is built native for that platform — not a wrapped web view — so it feels fast, familiar, and right at home on every device.
More platforms coming soon.
Control what each user can see with fine-grained, criteria-based permissions. Restrict or grant access based on library tags, genre, content rating, release year, or any combination. Perfect for keeping kids away from content they shouldn't see — without creating a separate library.
Save your permission criteria as presets to quickly apply the same rules to other users. Set it once, apply it everywhere.
Browsing & Organization
By default, all libraries roll up into just "TV Shows" and "Movies" — keeping things clean and simple for your viewers. Behind the scenes, you can still organize with tags and separate libraries. But the people watching don't need to think about it. If you prefer the classic multi-library setup, that's fully supported too.
Automatically group related media together with smart, dynamic collections. Collections update themselves as new content is added to your library — no manual curation needed.
Organize your collections within collections. Group the Marvel Cinematic Universe under a broader "Superhero" collection, or nest your holiday specials under seasonal categories. As deep as you need.
Create custom filters based on genre, rating, year, tag, or any other criteria — then pin them to the top of your Shows or Movies pages. Create them for yourself, or share them with all your viewers. Think "Superhero Movies", "Hallmark Christmas", or "90s Sitcoms" — always one tap away.
Browse what's trending, popular, and newly released — even if you don't own it yet. Discover gives you and your viewers a way to find new content to add to the library, right from within Kozi.
Playback Experience
Keep watching while you browse other apps on mobile. Kozi supports native picture-in-picture on both iOS and Android, plus background audio playback — perfect for listening to a show while you cook, or keeping an eye on the game while you text.
Download movies and shows to your phone or tablet for offline viewing. No complicated sync setup — just tap download and go. Pre-optimized libraries make downloads faster and smaller too.
When real-time transcoding is needed, Kozi leverages your GPU for hardware-accelerated transcoding. Intel Quick Sync, NVIDIA NVENC, and AMD VCN are all supported — delivering smooth playback without pinning your CPU.
Watch trailers for any movie or show right from within Kozi. Great for deciding what to watch next, or for giving your household a quick preview before committing to something new.
Kozi's shuffle is built to avoid the "we just saw this one" syndrome. It tracks what's been played recently and weights randomness to avoid repeats, giving you a genuinely varied shuffle across your library — not the same 20 episodes on repeat.
See who's in the scene without leaving the player. Kozi overlays cast information right on top of the video — tap to see the actors in the current scene and what else they've been in.
Cast what you're watching to any Chromecast or AirPlay-compatible device in your home. Start browsing on your phone, then fling it to the big screen with one tap. Kozi supports both protocols natively — no extra apps or workarounds needed.
Intelligence & Insights
Ever looked at an actor and thought "What do I know them from?" Kozi's "Known For" shows you what an actor has been in — not just what's in your library, but their full filmography. No more opening IMDB in another tab.
Kozi learns what you and your household genuinely enjoy — and suggests what to watch next. The recommendation engine runs entirely on your hardware, in your home. Your viewing habits are never sent to a server, never used for ad targeting, and never leave your network.
See what's happening across your server at a glance. Find your biggest media files, see what's most popular (and least popular) across all viewers, track who's watching what, and spot trends over time. Great for managing storage and understanding what your household actually watches.
Kozi monitors your media files for bit rot and corruption, alerting you before a damaged file ruins movie night. Proactive health checks keep your library in top shape over the long term.
Every member of your household gets their own profile with individual watch history, personalized recommendations, and separate "Continue Watching" rows. Kids, partners, roommates — each with their own experience, all sharing the same library.
Coming Soon
These features are actively in development and will be available in upcoming releases.
Stream and record live TV directly within Kozi. Connect your tuner and enjoy live channels alongside your on-demand library — with a built-in DVR to record shows for later.
A dynamic, TV Guide-style view that lets you browse your library like a cable guide — with channels populated from your own content. It's a nostalgic, lean-back way to re-discover things in your library you'd forgotten about.
A dedicated music player and streaming app built into the Kozi ecosystem. Stream your personal music library with the same polish and reliability you get from the video side — with a beautiful, purpose-built interface for albums, playlists, and artists.
Join the waitlist and be first in line when Kozi launches — with early adopter pricing locked in.
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