We Built the Tool
We Wished We Had.
Every rapper has been there. You are writing in your Notes app, trying to keep your rhyme scheme in your head, while praying you don't lose your best line.
Luke Mounthill
Founder / Producer
My name is Luke Mounthill. As a music producer at Luke Mounthill Beats, I've spent years watching incredibly talented artists struggle in the vocal booth—not because they lacked talent, but because their lyrics weren't built for the beat.
"They were using amateur tools to do a highly technical job. I got tired of seeing great songs ruined by bad notepads. So, I built RhymeFlux."
This isn't just another text editor with a dark mode. It is the first professional rap songwriting app that understands how hip-hop actually works.
The Pro Edge
Rhyme Power
Scans vowel sounds to surface multi-syllable rhymes you'd never spot on your own.
Flow Check
Counts syllables in real time and warns you when a line is too packed to fit the pocket.
Everything saves to your device the second you type. Wi-Fi dies, battery runs out, browser crashes — your bars are still safe. A lost line can cost you a hit, so the app is built to never lose one.
What I Believe In
Core principles that guide every line of code we write.
Your lyrics are yours.
I don't read, sell, or train AI on your writing. Your bars stay on your device or in your private account. Period.
Work Everywhere.
Studios, basements, or planes. RhymeFlux runs in your browser and works offline. No downloads, no installs, no excuses.
AI Helps. You Write.
The AI is a co-writer, not a ghostwriter. It helps you beat blocks and try new angles. You still make the call on every word.
Everything You Need to Write Better Bars.
A full breakdown of every tool inside RhymeFlux, from rhyme discovery to professional recording.
The Rhyme Engine
Find rhymes nobody else hears.
Generic dictionaries only catch the obvious. Our engine scans the actual sounds of your words to surface multi-syllable rhymes that standard tools miss.
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Real-Time Highlighting: Color-codes every rhyme family in your bars as you type — so "Incredible" and "Unforgettable" light up automatically.
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Sound-Based Matching: Ignores spelling and matches on vowel sounds. "Time" rhymes with "Mine," "God" with "Fraud," "veins" with "brain" — 9 hip-hop sound mergers built in.
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Internal & Slant Rhymes: Spots the mini-rhymes hiding inside your bars and the loose slant matches that rappers actually use.
The Digital Co-Writer
Break writer's block in real time.
Powered by Google's Gemini 3 Flash with custom Vibe profiles for Trap, Drill, Lyrical, and Melodic, the Co-Writer suggests punchlines and metaphors that match your scheme — never robotic, never generic.
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AI Suggestions Popup: Tap any word — a 3-column popup opens with rhymes, vibe-tuned word swaps, and multi-syllable phrase ideas.
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Generate Next Bar: On empty lines, pick a mode: Complete It (matches your scheme), Switch Up (new scheme), or Rhythm Match (mirrors syllable count).
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God Prompt: Stuck on a whole verse? Generate a 4–5 bar section in one shot, tuned to your active vibe.
The Audio Studio
Record as you write.
Stop switching apps. Record vocal takes straight onto the bar you wrote to check how they sit on the beat before you commit to a studio session.
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Per-Line Takes: Record vocal tracks directly in your browser. Pro users keep unlimited takes per line.
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Active Take Auto-Play: Mark a take as Active and it auto-plays when the line is focused — a vocal guide while you write.
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Recordings Live on the Bar: Each take stacks on the line's active version. Switch versions, takes follow.
Never Lose a Line
Solid as a physical notepad.
I built RhymeFlux so a lost line is impossible. Every keystroke saves to your device. Cloud sync runs quietly in the background. Pro users keep working for 3 full days off-grid.
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Works Offline: Write and record on a plane, train, or basement. Everything syncs the second you're back online.
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Private by Default: Your lyrics live in your private account. We don't read what you write — we only track basic stuff like when you sign in and save. No one is reading your unreleased verses.
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Auto-Save Every Keystroke: Saves to your device the second you type. Browser crashes or dead batteries cannot kill your bars.
Ready to Write Your
Best Verse?
Join the studio built for professional lyricists. Start using RhymeFlux for free today.
No credit card required.