Stack

Own it.Play iteverywhere.

The vinyl and CDs on your shelf, playable on your phone, shared with your family, and sold on when you're done.

Watch the pitch The pitch deck Try the prototype
Designed and built by Harrison Greener
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The pitch

Stack in three minutes

The problem, the product, and how it makes money.

Pitch video coming soon3 minutes
This copy is compressed so it loads quickly.Watch in full quality on YouTube
Pitch deck

The business behind Stack

Scroll down through the story, or press Present for the slide version with the arrow keys.

Pitch deckBrand guidelinesBusiness plan
Stack

Own it. Play it everywhere.

Harrison Greener · Founder and designer

1

You own the record. You still pay to hear it.

Vinyl and CDs are back, but they don't work with your phone. Collectors pay for streaming on top of the music they already own.

Your records
×
Your phone
Own The Dark Side of the Moon on vinyl? Play it on the bus. Pay Spotify again.
2

Stack makes owning the record the thing that unlocks it everywhere.

Stack
Your collectionAdd records by barcode, Discogs or the Puck. Browse covers, a crate or a list.
Play anywhereStream every record you own, or your own recorded pressing, crackle and all.
Share itFamily Stacks, friends, listening rooms, and a second-hand Marketplace.
3

The Puck turns a spin into your own copy

It sits between your turntable and speakers. Sound passes straight through, and the Puck records your copy in hi-res while logging every play.

Turntable or CD Stack Puck Your speakers Stack app Your copy, recorded once, playable anywhere
4

Vinyl is having its best year in three decades

£0m

UK vinyl sales in 2025, the highest in around 30 years.

Earlier years2025
+0%Growth in UK vinyl sales from 2024 to 2025
11 yearsOf growth in a row for the UK recorded music market
CollectorsBuy for the object, the artwork and the ownership. Stack gives that a digital life.
Source: BPI (2026). Bar heights are illustrative of the trend.
That's a lot of records with nowhere to play. 5

A working prototype, not a mockup

Everything here runs in the browser today. Try it at the bottom of this page.

6

One loop, four ways it earns

Each part feeds the next. Tap any part to see how it makes money.

Supporting:
7

Your music is free, sharing is paid

Solo
Free
Your own records, anywhere, in lossless, with no ads.
Duo
£10/month
Two people, one home, one shared Stack.
Family
£19.99/month
Up to four people. Everyone streams everything the family owns.
The Puck
1 for £302 for £503 for £75
Priced to get it into homes, not to make a big profit.
Marketplace
8% seller feePayment held until it arrives
The digital copy moves to the buyer with the record.
8

A rough three-year picture

Revenue from a launch in Manchester, then the North West, then the UK.

SubscriptionsPuck salesMarketplace fees
Assumptions
    Illustrative figures, not a forecast.
    9

    Other apps do one thing. Stack does all three.

    SocialOn your ownRent itOwn it Spotify Apple Music Discogs Bandcamp Stack
    SpotifyHuge catalogue, but you never own anything.
    DiscogsGreat catalogue and marketplace, but you can't listen.
    BandcampPhysical plus digital, but only from that one shop.
    StackAny record you own, playable, shareable and sellable.
    10

    The risks, and the answers

    Tap a card to flip it.

    RiskMusic rights

    Owning a record doesn't give you the right to stream it, or to copy it.

    Tap for the answer
    AnswerPartner with labels

    Many records already come with a download code. Stack becomes the home for it, licensed, with royalties on every play.

    RiskHardware costs

    Making, certifying and shipping the Puck is expensive.

    Tap for the answer
    AnswerStart small, keep it optional

    Barcode and Discogs import work without it. The Puck launches in small batches through record shops.

    RiskAn empty marketplace

    Buyers won't come without sellers, and sellers won't come without buyers.

    Tap for the answer
    AnswerLaunch city by city

    Start in Manchester with partner record shops listing their second-hand stock from day one.

    11

    Start in Manchester, grow from record shops

    1
    ManchesterPartner record shops, students and Record Store Day.
    2
    The North WestLiverpool, Leeds and Sheffield shops join the Marketplace.
    3
    The UKLabel partnerships and the Puck in stores nationwide.
    4
    BeyondMarkets where vinyl is growing, with local labels.
    12

    What testers said

    From product testing with the working prototype.

    I think this is something young people will really connect with. I’d definitely use it myself to help sell for my business.

    P1 · 48, vinyl shop owner

    The interface is so much better than other vinyl collecting apps. This is something I’d use, and I’d probably share records with my sister.

    P2 · 20, freelancer

    Why doesn’t this already exist?

    P3 · 31, teacher
    13

    Own it.
    Play it everywhere.

    Stack makes owning music feel better than renting it.

    Harrison Greener · harrisongreener.github.io/stack

    DJ Selector
    14
    ×
    Just you
    Solo
    FreeEvery record you own, anywhere, in lossless, with no ads
    2 people, one home
    Duo
    £10/monthOne shared Stack for two
    Up to 4 people
    Family
    £19.99/monthEveryone streams everything the family owns
    The Puck from £30Marketplace 8% seller feeStack Supply clothing and record gear
    Drag to turn
    (0) Stack

    Your records,
    everywhere.

    Stack turns the vinyl and CDs you own into a library you can play on your phone, share and sell.

    Scroll

    (1) The problem

    You own the record.
    You still pay to hear it.

    Records and phones don't talk to each other. Own The Dark Side of the Moon on vinyl, and you still pay a streaming service to hear it on the bus.

    (2) The solution

    Owning the record
    unlocks it everywhere.

    Add a record once by barcode, Discogs or the Puck, and it plays on every device, for your whole family.

    (3) The Puck

    A spin becomes
    your own copy.

    The Puck sits between turntable and speakers. Sound passes straight through while it records your copy in hi-res and logs every play.

    (4) The market

    £0mUK vinyl sales in 2025.

    Up 0% in a year, and the highest in around 30 years. Collectors want to own music again.

    Source: BPI (2026).

    (5) How it earns

    One loop,
    four ways in.

    (6) Pricing

    Your music is free.
    Sharing it is what you pay for.

    Playing the records you own costs nothing. Homes pay to share one Stack, and the Puck and Marketplace earn on top.

    (7) The product

    A working app,
    not a mockup.

    (8) Testing
    “I think this is something young people will really connect with. I’d definitely use it myself to help sell for my business.”P1 · 48, vinyl shop owner
    “The interface is so much better than other vinyl collecting apps. This is something I’d use, and I’d probably share records with my sister.”P2 · 20, freelancer
    “Why doesn’t this already exist?”P3 · 31, teacher
    (9) Competitors

    Other apps do one thing.
    Stack does all three.

    SocialOn your ownRent itOwn it SpotifyHuge catalogue, you never own anything Apple MusicRented, and on your own DiscogsGreat catalogue, but you can't listen BandcampPhysical plus digital, one shop only StackAny record you own: playable, shareable, sellable
    (10) Launch

    Start in Manchester,
    grow from record shops.

    (11) Marketing

    Out in the world,
    and on every phone.

    Physical

    Out in the world

    • Stickers and posters in partner record shops
    • Record Store Day events and listening parties
    • The Puck on shop counters
    • Stack Supply clothing and tote bags
    Tap here to add more stickers
    Digital

    On every phone

    • TikTok and Instagram campaigns
    • Music creators and DJs showing their Stacks
    • Shareable Stack Wrapped and Record Club picks
    • Invite a friend, both get a month free
    Tap here to add more
    (12) Revenue forecast

    How Stack
    makes money.

    Sharing plansPuck salesMarketplace fees

    How Year 1 adds up

      Model it yourself

      Drag to change how many people use Stack, and see what each stream earns in a year. Same assumptions as the table.

      people
      (13) Risks

      The risks,
      and the answers.

      Tap a card to flip it.

      RiskMusic rights

      Owning a record doesn’t give you the right to stream or copy it.

      Tap for the answer ↻
      AnswerPartner with labels

      Many records already come with a download code. Stack becomes its home, licensed, with royalties on every play.

      Tap to flip back ↻
      RiskHardware costs

      Making, certifying and shipping the Puck is expensive.

      Tap for the answer ↻
      AnswerStart small, keep it optional

      Barcode and Discogs import work without it. The Puck launches in small batches through record shops.

      Tap to flip back ↻
      RiskAn empty marketplace

      Buyers won’t come without sellers, and the other way round.

      Tap for the answer ↻
      AnswerLaunch city by city

      Manchester first, with partner record shops listing second-hand stock from day one.

      Tap to flip back ↻
      1 / 14
      Prototype

      Try Stack yourself

      This is the real prototype running live. Tap around, play a record, or open it full screen on your phone.

      1Flick through My Stack as covers, a crate or a list, and play a record.
      2Load a second record and slide the crossfader between two decks.
      3Check the leaderboards, Record Club and a friend's listening room.
      4Buy a second-hand record on the Marketplace.

      Best in full screen. The frame here skips the intro. Open it full screen to see the 3D intro film and, on a computer, the panel of demo shortcuts beside the phone.

      Open full screenSkip the intro film
      (∞) One more thing

      Help DJ Selector
      dodge the crates.

      Press space, or tap, to jump.

      0records dodgedBest 0
      Press space to startor tap the screen