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RhymeFlux
Leszna Górna, Poland
What it is
RhymeFlux is a rap songwriting app that displays rhyme, syllable, and flow cues while users write. Live rhyme highlighting matches words by sound in US, UK, Australian, and Canadian English, while a syllable counter and Beat Grid help identify bars that run long within a section. Its AI co-writer offers writing and rewrite suggestions in Trap, Drill, Lyrical, and Melodic styles. Users can attach recorded takes to individual lyric lines; paid plans allow up to 10 takes per line. The beat player loops YouTube beats or plays user-provided MP3, WAV, or M4A files. Writing works offline on every plan, with changes syncing after reconnection. The maker says lyrics are not used to train AI models and are not sold or shared. Lyrics are stored locally first, and cloud-synced content is encrypted in transit and at rest. When the co-writer is used, up to the previous eight lines of the current song go to Google's Gemini API for suggestions. The free plan is free, billed forever, and limits users to one active song with three sections and 15 AI Credits every 30 days. Paid options include $15 a month or $99 a year.
For and against
For
- Rhyme highlighting supports four English varieties.
- Beat Grid flags bars that run long.
- Offline writing is available on every plan.
- Record takes can be attached to lyric lines.
- Lyrics are not used to train AI models, according to the maker.
Against
- Rhyme highlighting is designed for English only.
- Free plan limits users to one active song.
- Free plan highlights only the first 12 bars of the first section.
- Using the co-writer sends up to eight prior lines to Gemini.
The verdict
RhymeFlux combines writing cues, line recordings, and beat playback, with offline access across plans. Its free plan is limited, and rhyme highlighting is intended for English.
Who it suits
RhymeFlux suits rap writers who want rhyme, syllable, and beat-length cues while drafting, along with line-level recordings. It is designed for English-language rhyme work and supports offline writing.
Plans and prices
Free
1 active song (3 sections) · 15 AI Credits every 30 days · rhyme highlighting on first 12 bars of first section
Read 7 Oct 2026 · rhymeflux.com
Monthly Plan
Unlimited projects and songs · 800 AI Credits every 30 days · up to 10 recording takes per line
Read 7 Oct 2026 · rhymeflux.com
Annual Plan
Unlimited projects and songs · 800 AI Credits every 30 days · up to 10 recording takes per line
Read 7 Oct 2026 · rhymeflux.com
Lifetime Plan
Unlimited projects and songs · 800 AI Credits every 30 days · up to 10 recording takes per line · access for life of product
Read 7 Oct 2026 · rhymeflux.com
On the record
- AI co-writer
- The AI co-writer offers writing and rewrite suggestions in Trap, Drill, Lyrical, and Melodic styles.rhymeflux.com · read 7 Oct 2026
- AI data processing
- When the co-writer is used, up to the previous eight lines of the current song are sent to Google's Gemini API to generate suggestions.rhymeflux.com · read 7 Oct 2026
- Beat player
- The built-in beat player can loop YouTube beats or play user-supplied MP3, WAV, or M4A files.rhymeflux.com · read 7 Oct 2026
- Integrations
- The beat player supports YouTube beats and user-provided MP3, WAV, and M4A audio files.rhymeflux.com · read 7 Oct 2026
- Language limit
- Rhyme highlighting is designed for English and the maker says it will not accurately catch rhymes in Spanish, French, or other languages.rhymeflux.com · read 7 Oct 2026
- Maker and location
- The About page identifies Luke Mounthill as founder and producer, and the privacy policy gives an operating address in Leszna Górna, Poland.rhymeflux.com · read 7 Oct 2026
- Offline use
- RhymeFlux supports offline writing on every plan, with changes syncing when the device reconnects.rhymeflux.com · read 7 Oct 2026
- Privacy
- The maker says lyrics are not used to train AI models and are not sold or shared.rhymeflux.com · read 7 Oct 2026
- Product
- RhymeFlux is a rap songwriting app that displays rhymes, syllables, and flow while users type.rhymeflux.com · read 7 Oct 2026
- Recording
- Users can record takes attached to individual lyric lines, and Pro supports up to 10 takes per line.rhymeflux.com · read 7 Oct 2026
- Rhyme matching
- Its live rhyme highlighting matches words by sound and supports US, UK, Australian, and Canadian English.rhymeflux.com · read 7 Oct 2026
- Storage and encryption
- Lyrics are stored locally first, and enabled cloud-synced content is encrypted in transit and at rest.rhymeflux.com · read 7 Oct 2026
- Support
- The privacy policy lists [email protected] for privacy questions and data requests.rhymeflux.com · read 7 Oct 2026
- Syllable tools
- A live syllable counter and Beat Grid flag bars that run long relative to the rest of a section.rhymeflux.com · read 7 Oct 2026
