Bolted · Design and engineering, since 2012

Intelligence is getting cheap. Judgment is not.

262,144 points, each one an answer a machine could give.

One light picks the one worth sending.

How we work

Someone has to stand behind what ships.

AI does the routine work. One of us reviews every change and tests it on a real device.

Built on proof

Designed to the millimetre. Proven on the device.

Every app is tested on the hardware it ships to, with a written account of why it works.

What we do

We design and build apps that have to work.

See the workStart a project

SC 01 · Abundance
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Company
Founders
Sebastian and Andres
Since
2012
Where
San Francisco and Palma

A small company, on purpose. The two of us lead every project, with designers and engineers we have worked with for a decade. Nothing ships until one of us has checked it.

12MPeople a year use apps we have worked on
10 yrsOn safety-critical medical alerts
14 yrsBuilding native apps
7Platforms we build foriOS, macOS, watchOS, visionOS, tvOS, Android and Windows
About the company
Selected workSee all nine
01 · Medical alerts · Our expertise

Medical alerts that reach people in time.

For a decade we have built the alerts in regulated medical software: the ones that have to wake someone, whatever state the phone is in. Reach, our first product, tests that they do.

Reach
02 · iOS app · Hatch

A daily collectible for iPhone, from the brand to the films.

Hatch gives you one egg a day. Knock five times and one of a million 3D creatures hatches, each with its own name, look and voice. We made all of it: the identity, the app, the films and the website.

Hatch
03 · iOS game · Our own

A pocket puzzle where one swipe moves every piece.

Snug is a puzzle game for iPhone from Playbreak, our games label. Tilt the tray and every piece slides, so the order you move them in is the puzzle. A computer proves the best solution to every level.

Snug
04 · Health app · Our own

A private diary for people living with chronic hives.

Two taps a day record the hives and the itch. The days add up to the weekly score specialists use, and to a report a doctor can read in a minute. No account, and nothing leaves the phone unless you send it.

Truthdots
05 · iOS game · Our own

A game you play with your face.

An emoji drops into a ring and you copy its face before the ring runs out. One miss ends the run, and every face you pulled lands on a sheet you can send.

Mugio
06 · Film format · Our own

Hard ideas, explained as you scroll.

Lightline is our own film format: one engineering drawing, one moving light, and your scroll as the camera. The first film follows a glucose alarm at 03:12 from the sensor to the person it has to wake.

Lightline Watch the film
Reach · launching November 2026

Our first product: medical alerts that get through.

Phones are built to stay quiet. Reach tests that a medical alert actually reaches the person, on every iOS release, on real devices. We are building it from scratch, on what a decade of building medical alerts taught us.

One email when it launches. Nothing else.

What it will test
  1. Focus and Do Not Disturb
  2. Deep sleep and background
  3. Permissions and resets
  4. Accessories and volume
  5. Bluetooth reconnection
  6. OS betas and updates
  7. Time-sensitive and critical
  8. Delivery receipts
Start a project

Tell us what you're building.

An app, a device, a redesign or just an idea. One of us reads it and replies within one working day.

This is about . It is , and it has to work .

Or write to [email protected]. Under NDA? Say so. Still deciding? Ask Bolty, our guide to the work.