Drop it — Beltr. Connect it — Beltr. Sing it — Beltr.
Hit notes you’ve never hit.
Turn any track you own into karaoke on your TV — synced lyrics, phones as mics and remotes. Buy once. No subscription. Nothing leaves your machine.
$19.99 Launch price
One-time purchase · no subscription, ever
5 songs free · no signup · no card
Works offline · Mac, Windows, Linux
14-day refund · built by one developer
The magic
This is exactly what Beltr does to any song you own — on your own machine, in a minute or two, with nothing uploaded.
“Beltr” — original theme song
5 songs free · no card · Mac, Windows & Linux · big installer — the whole engine ships inside, nothing uploads
Almost no work
No converting. No hunting down karaoke files. No typing out lyrics. Point Beltr at the music you already own and it handles the rest by itself — here's the actual app doing it.
01 · Setup
Setup asks one real question: where's your music? Beltr checks the usual places — your Music folder, an Apple Music library, a folder of karaoke discs — and shows you what it found. One tap connects it.
Nothing gets copied, converted, or moved. Your files stay exactly where they are.
02 · Your library
Every song in that folder is now sitting in Beltr, searchable by artist, album and genre. There's no separate karaoke catalog to buy from and nothing to prepare in advance.
When someone asks for a song, you find it and hit one button. That's the whole interaction.
03 · The work
Beltr strips the vocals, pulls the synced lyrics, maps the pitch and reads the key — on your own machine, one song at a time, entirely on its own. You get named stages instead of a spinner.
And it hands the song over early: the moment it's singable it says so, and finishes the polish in the background.
04 · Showtime
Press Play and Beltr opens the big screen, starts a room and puts a code and QR on the TV. Phones join by scanning it — no app to install, no pairing, no accounts.
And you don't wait for any of this the first time: Beltr arrives with a song already prepared, so you can sing before you've imported a thing.
No card · no signup · Mac, Windows & Linux
One library
AI-made tracks and CDG karaoke discs in the same library. Export the whole thing to any karaoke machine.
Drop in MP3+G or CDG zips. They sit next to your AI tracks, marked so you can tell them apart — and the filter bar lets you pull up just the discs, just the HD tracks, or everything at once.
Export to MP3+G. Burn it, USB it, drop it on the hardware karaoke in the basement.
Every screen in sync
Lyrics light up the TV while everyone steers from their phone: queue songs, fade the vocals, fire off reactions. All in sync, instantly.
The features
01 · Any song
Drop any MP3 you own and Beltr starts on it by itself — no second button, no upload, no cloud. A minute or two later it's a karaoke track. Your whole library, karaoke-ready.
02 · The big screen
Word-by-word synced lyrics glow on your TV, with a countdown into every line and a cinematic spotlight on the words. The living room becomes the stage.
Today you reach the TV over HDMI, casting, or its built-in browser. Native TV apps are live on both stores: Apple TV on the App Store and Android TV & Google TV on Google Play. Install Beltr right on the television and join your karaoke night with a single tap.
03 · Everyone plays
Scan a QR code to join in seconds. Queue songs, fade the vocals, fire off reactions, and watch your score climb. Everyone runs the night from their own phone. And with the free Beltr Remote app, on the App Store and Google Play, your phone is the microphone too.
04 · Live scoring
A live pitch bar shows the note you're reaching for, and your score climbs line by line. Pass the mic around and let the leaderboard decide who really carried the chorus.
Practice room
When the crowd goes home, Beltr is how you actually get better. Pull up any song on your own and drill the part that keeps tripping you, with nobody watching.
Drop any song to 50% speed with no chipmunk effect, so you can finally hear the run before you have to sing it.
Set A, set B, and the tricky eight bars repeat until they're muscle memory.
Beltr tracks your weak lines across every attempt and keeps it to itself. Nothing ever touches the party leaderboard.
Reveal Reel
Beltr quietly records your performance while you sing. The moment you finish, scan the code on the TV and the clip is on your phone in crisp vertical video, ready to post or text to the group. Made right on your machine, shared only when you tap.
Your performance films itself in shareable vertical video. No second phone, no setup, no scramble to hit record.
Finish the song and a code lights up the TV. Scan it and the take is in your hand, ready to send.
The clip is made and kept on your own machine. Nothing uploads anywhere. It travels only when you choose to send it.
On by default, off in a tap. Keep the whole song or just the last 20 or 60 seconds.
Everything included
No add-ons, no upsells, no monthly anything. Every feature is in the box the day you download it.
Open Beltr and the Beltr anthem is already loaded two ways — an AI-separated HD version and a classic CD+G karaoke disc — so you can sing before you import a thing.
AI strips the vocals from any MP3 you own, right on your computer. Nothing uploads.
Synced lyrics light up the TV in perfect time, with a countdown into every line.
Everyone scans a QR and runs the night: queue songs, fade vocals, fire reactions — or sing right into the phone with the free iPhone & Android app.
A pitch bar shows the note to hit, and your score climbs line by line.
Beltr films your performance and hands you a vertical clip to post. Made on your machine, shared only when you tap.
Slow it down, loop the hard part, and track your weak spots in private.
Shift any song up or down six semitones to land it in your range.
Import CDG karaoke discs and export to any hardware karaoke machine.
Your music never leaves your computer. No account, no cloud, ever.
Cinematic looks that put the words under a stage light.
Play the real music video behind the lyrics, in sync.
Mini-games fill the breaks between songs and keep the room warm.
One-time purchase. No subscription, no expiry, no nagging.
No subscription
The most popular subscription karaoke app runs $9.99 a month, every month. Beltr is $19.99 once, then never again. Why isn't it a subscription — and why this cheap? Because Beltr runs entirely on your own computer: there's no cloud server for me to rent and no per-song bill to pass on to you, the two costs subscription karaoke apps charge every month to cover. One developer, sold once, yours to keep. It pays for itself in about two months, then it's free for life.
| Beltr | Subscriptions | Free lyric videos | |
|---|---|---|---|
| Monthly cost | $0 forever | $7–10/mo | Free, with ads |
| Your own music | Any MP3 you own | Their catalog | Hit or miss |
| Works with karaoke machines | Yes — MP3+G in & out | No | No |
| Works offline | Yes | No | No |
| Phone remotes | Any phone | Some | No |
| Live scoring | Yes | Some | No |
| Price | $19.99 once | $80–120/yr | Free (limited) |
“Just paid for another month of KaraFun… I'm VERY interested in your app. Keep going!”
— r/karaoke“Paid for the app this morning. Love being able to send hype to the screen during a performance — that's been on my list for a long time. I can see value in this!”
— r/karaokeHelp shape the future of Beltr
New features, fixes, and half-baked ideas get hashed out in the Discord first. Drop in, tell us what’s missing, and help shape where Beltr goes next.
Get Beltr
Five songs free to start. Pay once when you're hooked. $19.99, forever.
Installers are 700 MB–1 GB depending on platform: the entire AI engine ships inside. Nothing uploads, nothing runs in the cloud.
Windows without the Store? Download the .exe installer · SmartScreen may ask once — here’s what to expect
$19.99 — one-time, forever
5 free songs included. No subscription, ever. A year of subscription karaoke runs $80–120. Beltr is $19.99 once.
Two ways you can't lose: try it free on 5 of your own songs — no card, no time limit. Buy it and change your mind? Full refund within 14 days — just email support@beltr.app. No forms, no questions.
Secure checkout via Lemon Squeezy — instant license key by email. One key covers 2 devices.
Built by one person — CasaVargas LLC. No servers, no investors, no subscription — that's why it's a one-time price.
Now on every screen
The stage on your TV, the mic in every hand, the engine on your desktop. The TV and phone apps are free companions — the Beltr desktop app is the one $19.99 purchase that powers them all.
On your TV
Synced lyrics, the pitch highway, live scoring, album art and CD+G — rendered crisp on the biggest screen in the house.
In every hand
A wireless microphone and a full remote in everyone’s pocket. Sing into it, queue from it, watch your score climb on the TV.
On your computer
Your Mac, PC or Linux machine does the heavy lifting — vocal separation, lyrics, the whole library. Buy once, runs offline.
Included free with Beltr
Beltr Remote turns the phone already in your hand into the wireless microphone: sing into it, hear your voice through the room speakers, and watch your score climb on the TV. The free companion to Beltr, now on iPhone and Android.
Scan to get the app
FAQ
Beltr is a one-time $19.99 karaoke app for Mac, Windows, and Linux that turns any song you own into a karaoke track — vocals removed on-device with AI, synced lyrics on your TV, and phones as wireless remotes.
Add any MP3, FLAC, or WAV from your library and Beltr starts on it automatically: its on-device AI separates the vocals from the instrumental — a minute or two for a typical song, quicker on a recent Apple Silicon Mac and longer on an older CPU-only PC — then syncs the lyrics to the music. Beltr also opens with a song already prepared, so you can sing before you import anything.
No. Beltr is a one-time purchase of $19.99 with a free 5-song trial. No subscription, no accounts, and lifetime updates are included.
Just a computer and a TV or projector for the lyrics (HDMI or casting). Guests' phones become the microphones and remotes by scanning a QR code — no extra hardware required.
