AGB Labs

I decide what to build. Then I build it.

Adam Bell, product manager and solo builder. More about me

BumpSyncLive on iOS, Android and web

A pregnancy app for both parents, not just one.

The bet
Start with the decision couples enjoy most. Both parents swipe on names, and only the matches show.
What happened
Couples who connected were 9× more likely to still be using it a month later. So 2.0 was rebuilt around getting the second parent in.

React + Supabase + Capacitor + Amplitude

Read the case studybumpsync.app

Sam has swiped
Your matches 0

Aoife

Irish origin

Radiance, beauty

Tap the heart or the cross, or use your arrow keys.

Still active 28 days after sign-up
Partner connected37%
Using it alone4%

HushSyncLive

Hum a lullaby. Get back a finished song.

The bet
Every parent makes up songs at 3am. HushSync turns that half-remembered tune into a finished song you can keep.
How it works
Each model does the job it’s best at. Gemini hears the melody, Claude writes the words, Lyria composes, and Gemini Image paints the cover.

React + Supabase + Claude + Gemini + Lyria + Stripe

hushsync.app

  1. Gemini listens

  2. Claude writes the words

  3. Lyria composes the music

  4. Claude and Gemini paint the cover

This is a simulation of the real pipeline, made for this page. The tune is played by your browser.

LittleSpotsLive in Greater Manchester

Where can I actually eat out with a baby?

The bet
An empty directory is a dead one. So fill it from public data first, let AI read each venue’s menus and photos, then ask the owners.
What happened
6,725 venues live across Greater Manchester, from 17,106 found. AI guesses are labelled as guesses until an owner confirms them.

Next.js + SQLite + Gemini + Firebase

littlespots.co.uk

17,106places found in public data
6,725kept after checks
359facts confirmed by owners

Café, Prestwich

The Corner Kitchen

AI estimate
  • Baby changingLikely, 60% sure
  • High chairsLikely, 92% sure
  • Room for a pramLikely, 58% sure
  • Kids’ menuLikely, 88% sure
  • Step-free entranceLikely, 71% sure

Read from the menu, photos and reviews.

An example venue. The numbers above are from the live directory.

MavropostIn beta

An AI marketing team that can’t post without you.

The bet
A one-person product can’t pay for a marketer, and it can’t risk an AI posting something wrong. So the AI drafts, and a person decides.
What happened
It plans the week, blocks risky claims before anyone sees them, and publishes on one tap. It runs BumpSync’s Instagram.

Node + SQLite + Gemini + Claude Haiku + Instagram API

Mavropost

Published without a person: 0

To review 2Scheduled 0Blocked 1

Pinterest pin

Irish baby names you will both actually agree on

Swipe separately, match together. 40 Irish names couples keep landing on, from Aoife to Cillian.

Instagram carousel

You feel weirdly left out

Six weeks in and one of you is exhausted, the other is Googling everything at 2am. Here’s what nobody tells the other half.

Blocked before review

“This tea brings on labour naturally.”

Compliance check: health claim. Never shown for approval.

The workshop

Private tools I use every week.

Hiring a product manager who ships?

Email meSee how I build