Formulate, running a little late.

Open source fixes for everyday headaches.

We use them ourselves first, then publish them for free.

Built by three friends in Ontario.Musa, Ferrin and Noor. Meet the crewRead the codegithub.com/Fermulate

Free. Actually free.*

Every project, forever

  • No trials.
  • No “pro” tier.
  • No telemetry.

* It's all open source, so you can check.

  1. The usual place
    Table for 6

    2 x Noodles31.00

    1 x Curry17.50

    3 x Mango lassi18.00

    Shared apps24.00

    1 x Water0.00

    Subtotal90.50

    HST 13%11.77

    Tip??

    Total102.27

    Split 6 ways =

    ?

    who had the curry?

    I only had water

    I'll e-transfer you later

    Splitting the bill after dinnerFixed by Potluck

  2. When is everyone free?

    FriSatSunMorning2/60/61/6Lunch1/63/62/6Afternoon3/64/65/6Evening4/66/63/6

    does friday work?

    can't, sorry

    next week?

    Finding a time that works for everyoneFixed by Potluck

  3. Yours?

    Got a headache we should fix? Tell us about it.

    +
    Pitch a headache on GitHub

Drawn to scale

Preciselylate.

Every number in the mark is whole, except where the ring stops: 161.3, 48.6. That is where the dot got to.

Every fix starts as a headache.

Same coin, other side.

or keep scrolling

0104

0204

0304

0404

Pick a fix

Potluck

Split the bill, plan the day.

The headacheSplitting the bill and planning the day with a group, in one place instead of three apps.

  • Five ways to split, exact to the cent
  • Multi-currency with daily rates
  • Availability polls with a live heatmap
  • Settle up in as few payments as possible
  • Installable app, light and dark, no ads, no tracking
Kind
Mashup
License
AGPL-3.0

Live, early development

Live and in daily use by us. Expect rough edges. Next up: guest links so friends without an account can add their times.

Open Potluck

The guideThe code

Not built yet

More are cooking.

The headacheYours, maybe. Anyone can pitch one in GitHub Discussions.

  • New tools. Problems we couldn't find a good answer to, so we wrote one.
  • Free alternatives. The thing you already use, minus the subscription.
  • Mashups. Several tools that should have been one app, made into one app.

Cooking

Nothing to show yet. When there is, it lands here.

Read the pitches

Pitch a headache

Spec sheet

potluck-docspotluck
LicenseCC-BY-SA-4.0AGPL-3.0
LanguageMDXTypeScript
Stars01
Open issues and PRs04
Last push2026-11-132026-11-13
Price$0.00$0.00
Readable bySomeone learningSomeone learning
  1. potluck #5 Add a launch checklist2026-11-05
  2. potluck #7 Fix data bugs and tighten archived groups2026-11-05
  3. potluck #8 Block-aware invites, former members, and safer concurrent money writes2026-11-05
  4. potluck #9 Consistent money amounts across currencies and locales2026-11-05
  5. potluck #10 Plans grid labels, reliable availability saves, push fixes2026-11-05
  6. potluck #11 Agent-friendly repo setup, one verify command, and an FX precision fix2026-11-06
  7. potluck #15 Splitwise parity matrix2026-11-12
  8. potluck #16 Move to potluck.fermulate.com2026-11-13
  9. potluck #17 Notification settings per type, email outbox and unsubscribe2026-11-13
  10. potluck #18 Several payers, adjustments, refunds, stored items and edit history2026-11-13

Free and open source

Clone us.

GitHub org2 reposPitch a headache

Abstract

We present Fermulate, a few friends with computer science backgrounds who build free, open source fixes for everyday headaches, use them ourselves, then publish them. Results so far: Potluck (live, early development), 2 open source repos and 10 merged pull requests. Future work: whatever annoys you next.

Numbers from the GitHub API, updated 2026-11-13

Milton and Hamilton, Ontario

The crew