Free · Songwriting · iPhone · iPad · Mac

Where songs get written.

A songwriter’s notebook with a producer’s brain.

Capture lyrics the instant they hit, then tag every song with BPM, key, scale, and syllable counts — so ideas stay organized and ready to record. AI only when you ask. Your lyrics stay yours.

  • iPhone · iPad · Mac
  • Free on App Store
  • BPM · key · scale
  • Syllable counter
  • AI line suggestions
Download on the App Store Download free
Free · iPhone, iPad & Mac · A Harmony Stack product
iPhoneLive
iPadLive
MacLive
FreeApp Store
App Store · free to start No subscription for the core studio BYO-key AI · your control You own your lyrics
From writers

Built for the moment the line hits.

Placeholder quotes until real App Store reviews land — structure is ready to swap.

★★★★★

“Finally a notes app that knows what BPM and syllables are. I write on the train and everything’s tagged before I hit the studio.”

Early tester Indie songwriter
★★★★★

“The AI is there when I’m stuck — but it doesn’t own the song. My key, my lines, my catalog.”

Early tester Rap / R&B writer
★★★★★

“Free and focused. No $13/month wall just to keep my verses in one place.”

Early tester Worship & pop
How it works

Spark → structure → lines → unstick.

Four steps from the idea in your head to a song you can open tomorrow.

1

Capture the spark

New song in one tap. Get the line down before it vanishes — clean editor, no clutter.

2

Tag the music

BPM, key, scale on every track so your catalog is searchable and session-ready.

3

Shape the bars

Live syllable counts help the words sit on the beat. Build verses, hooks, and bridges.

4

Unstick with AI

Optional next-line ideas with direction, style, and tone — only when you ask, with your key.

Rap & hip-hopPopCountryR&BWorshipFolkSinger-songwriter
Why Penwork

Lyrics on the left. The music in your head on the right.

Everything a writer needs to catch an idea and shape it into a song — in one focused, fast studio.

Distraction-free editor

A clean canvas for verses, hooks, and bars — nothing between you and the line.

Musical metadata

Tag each song with BPM, key, and scale. Live syllable counts help lock your flow.

AI line suggestions

Set direction, style, emphasis, and tone — then generate next-line ideas when you’re stuck.

Organize your catalog

Sort by folders, BPM, or date. Search your entire songbook instantly.

Built for speed

New song in a single tap — with undo/redo, filters, and a timeline of every idea.

Every idea, timestamped

From a one-line spark to a finished track, each song keeps its details and history.

Inside the app

Catalog. Editor. AI assist.

Annotated looks at the three screens you’ll live in — not a feature dump, a writing flow.

From pocket idea to tagged song.

Open catalog → drop into the editor → unstick with AI when a line stalls. Motion demo can replace this strip later; for now the path is clear.

1 · Catalog → 2 · Write → 3 · Tag BPM / key → 4 · AI assist
Penwork catalog with song tags

Your whole songbook, tagged.

Every idea in one place — searchable, sortable, ready when the session starts.

  • 1
    Song cards at a glanceTitle, preview lines, and musical tags without opening a mess of notes.
  • 2
    BPM & key on the trackFind that mid-tempo tune in D without scrolling forever.
  • 3
    Instant new songOne tap when the line hits — write first, organize after.
Penwork lyric editor

Write like it’s just you and the page.

A distraction-free canvas for verses, hooks, and bars — with music-aware tools when you need them.

  • 1
    Clean lyric canvasNothing between you and the next line.
  • 2
    Syllable awarenessKeep bars tight so the words sit on the beat.
  • 3
    History you can trustTimestamped ideas from spark to finished track.
AI line suggestions controls

Stuck? Ask for a push — not a takeover.

Set direction, style, words to emphasize, and tone. Generate next lines only when you want them.

  • 1
    You set the creative dialsDirection, style, emphasis, topics, tone.
  • 2
    BYO API keyYour provider, your billing, your control — not a forced sub.
  • 3
    You stay the writerSuggestions are sparks. The song is still yours.
Download on the App Store
Every screen size

Available on iPhone, iPad & Mac.

Write on the phone in your pocket, spread out on iPad, or sit down at a Mac — same studio, same songs.

iPhone Live iPad Live Mac Live Free on the App Store

Pocket studio — capture lines the second they hit.

Penwork catalog on iPhone
Catalog on iPhoneBPM, key, and previews in your pocket.
Penwork editor on iPhone
Editor on iPhoneWrite verses and hooks anywhere.
AI suggestions on iPhone
AI assist on iPhoneUnstick a line between stops.
Download on the App Store
Why not just Notes?

Free craft tools — without a $13/month wall.

Typical songwriting apps charge after a trial. Generic notes apps don’t know what a key signature is.

What you get Notes / Notion Paid songwriting apps Penwork Studio
Price for core writing Free clutter Often $3–13/mo after trial Free on App Store
BPM · key · scale tags No Sometimes Yes
Syllable awareness No Often yes Yes
AI help None / separate app Usually behind subscription Optional · BYO key
Your lyrics ownership You own notes Varies by product Explicitly yours
Built as a song catalog Generic folders Yes Yes · search & sort

Competitors change pricing often — Penwork’s pitch is simple: write free, tag the music, AI only when you ask.

Trust

Write the song. Keep the rights.

Craft first. Control first. No “we train on your verses” story.

You own your lyrics

Titles, verses, hooks, notes — your content stays yours. We don’t claim your songs or compositions.

AI is optional & yours

Bring-your-own API key. Requests go from your device to your provider — not through a Harmony Stack middleman.

Built for the pocket studio

iPhone, iPad, and Mac. Write on the bus, at the desk, or in the booth — one catalog across your Apple devices.

FAQ

Straight answers before you download.

Is Penwork Studio free?

Yes — free on the App Store for iPhone, iPad, and Mac. Download and start writing without a subscription wall for the core studio.

What can I track on each song?

BPM, key, scale, syllable counts, titles, lyrics, and timestamps — so your catalog stays searchable and session-ready.

How do AI line suggestions work?

AI features are bring-your-own-key: you add a provider key on device, then requests go from your device to that provider. Harmony Stack doesn’t middleman your prompts. See Terms & Privacy for details.

Who owns my lyrics?

You do. Your content stays yours. We don’t claim ownership of your songs or compositions.

What devices is it on?

iPhone, iPad, and Mac — one free App Store download for the Apple devices you write on. Universal app, same catalog and tools.

Who built Penwork Studio?

Harmony Stack — the same studio behind custom sites, Shopify, and apps like CDL One Stop. Support: harmonystack@gmail.com or (201) 745-7995.

Your next song is one tap away.

Download free, catch the spark, tag the track, and keep every idea ready to record.

Download on the App Store Get Penwork free

Free on iPhone, iPad & Mac · A Harmony Stack product

Studio

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