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The cosplay build planner · iPhone first

From first foam cut to con day.

Pieces, tasks, budget and every con day of your cosplay in one place, on your phone. No account needed.

By joining you agree to a confirmation email now and Cosapp.si launch and product-update emails later. You must be 13 or older. Unsubscribe any time. See the Privacy Policy.

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The Cosapp.si builds screen with the featured Lumi Starbloom build and an archive of build cards.
01

Break it into pieces.

3/8 pieces

02

Tick off the work.

2/7 tasks · $212

03

Count down to con day.

43 days left

04

Pack the bag. Con-ready.

11/25 packed

Builds, pieces and budget

Break the costume into pieces.

Each build is a character, a series, a target con and a budget. Keep scrolling to finish the sample Nova Pilot build, just as you would in the app.

  1. 01

    List every piece

    Make or buy, status, cost and the store link, so nothing hides in a group chat.

  2. 02

    Tick off the tasks

    Tag tasks to a piece and give them a due date. A reminder taps you when it matters.

  3. 03

    Watch the budget

    Spent adds itself up from piece costs, against the budget you set for the build.

Nova Pilot

Skyforge Unit · sample build
for Winter Hollow Con
3/8
Pieces
2/7
Tasks
$212
Budget, of $350
  • Chest armour · Make · $46Done
  • Shoulder plates · Make · $28Done
  • Gauntlets · Make · $22Working
  • Leg armour · MakeTo do
  • Pilot suit · Make · $38Working
  • Short blue wig · Buy · $54Done
  • Core LED strips · Buy · $24To do
  • Helmet visor · MakeTo do
The Nova Pilot build screen in Cosapp.si: pieces, tasks and budget rings, a countdown scrubber to Winter Hollow Con, and the pieces list.
The Nova Pilot build screen in Cosapp.si: pieces, tasks and budget rings, a countdown scrubber to Winter Hollow Con, and the pieces list.

Progress photos

Every stage, on film.

  • Red scissors, a thimble and pins on a paper pattern.
    Patterns cutNova Pilot
  • A grey and black sci-fi helmet with a tinted visor.
    Helmet primedNova Pilot
  • A sci-fi helmet with a purple visor stripe.
    Visor fittedNova Pilot
  • Pink tulle and sequin dresses on hangers.
    Tulle for the skirtLumi Starbloom
  • Large white feathered wings and a red gown on a dress form.
    Wings on the formLumi Starbloom
  • An orange embroidered silk kimono on a display stand.
    Haori pattern matchCrimson Ronin
  • A katana resting on an acrylic stand.
    FinishedCrimson Ronin

Photograph the build as it comes together. Photos line up on a timeline, and Before and After shows how far it has come. They stay on your phone.

Conventions and packing

Count down to con day.

Add the con, pick one build for each day, and Cosapp.si turns those builds into your prep and your packing list.

Winter Hollow Con · Nova Pilot43 days from today to Winter Hollow Con, with five task due dates before it.

  • One build per day

    Day tiles show which costume you wear Friday, Saturday and Sunday, and how much of each is packed.

  • Prep tasks with reminders

    Badge pick-up, the photoshoot slot, batteries to charge: each with a due date and a nudge.

  • A packing list that writes itself

    Every piece of every build you wear lands on the list. Add your own items; your checks survive changes.

Winter Hollow Con in Cosapp.si: a 42-day countdown, badge and hotel notes, one build per day, and prep tasks.
Convention
The packing list for Winter Hollow Con, grouped by day and build, with packed items ticked off.
Packing

Local-first

No account. Your studio lives on your phone.

Be first in line for Cosapp.si.

We email you once it is ready for your phone. Confirm your address and you are on the list.

By joining you agree to a confirmation email now and Cosapp.si launch and product-update emails later. You must be 13 or older. Unsubscribe any time. See the Privacy Policy.