Gravity Leap

Sketch to ship.

Gravity Leap is a product studio. We design and build apps, websites, graphics and video, with AI in every step of the work.

Start a projectSee the work ↓
Tide Buddy's Now screen on a phone: Portland, tide level 3.4 ft and rising, next high tide in 3h 46m.Tide Buddy — shipping to the App Store and Google Play

Case study · mobile app · iOS + Android

Tide Buddy

Tide Buddy's Now screen: Portland, NOAA station 8418150, tide level 3.4 ft and rising, next high tide in 3h 46m, with a 24-hour tide curve and the day's highs and lows.
  1. 1SketchOne question, on a napkin: what is the tide doing right now?
  2. 2WireframeOne screen. The answer in three seconds, before anything else.
  3. 3DesignThe real build, on a real phone. Flutter, offline-first, no subscription.
  4. 4ShippedLive right now: Portland, ME, next high 11:25 AM, 10.8 ftNOAA station 8418150 — the same data the app reads

tidebuddy.appprivacy policy

Every screen, as it ships. Launching soon on the App Store and Google Play.

  • Tide Buddy's Now screen: Portland, NOAA station 8418150, tide level 3.4 ft and rising, next high tide in 3h 46m, with a 24-hour tide curve and the day's highs and lows.Now
  • Tide Buddy's Saved screen: two saved stations, each showing current level, direction and time to the next tide.Saved
  • Tide Buddy's Stations screen: search for tide stations, favourites list, and a use-my-location option.Stations
  • Tide Buddy's Settings screen: units, theme, tide alerts, lock-screen tide, and activity alerts for clamming, tidepooling, wade fishing, boat ramp and surf fishing.Settings

Case study · web tool · desktop + phone

MX Jump Builder

A free calculator for people who build motocross jumps. Before a shovel moves, it shows where the rider lands, how hard, and how much dirt to order.

  • Exact landing physics, checked against an independent solver across 8,640 jump setups.
  • It never calls a crash safe: the speed window, the gauge and the print sheet all use the same verdict.
  • Prints a construction sheet: stake distances, slopes and dirt in cubic yards.

Open MX Jump Builder ↗

MX Jump Builder on a laptop: a to-scale side view of a double jump with the rider's arc landing on the downslope, numbered stakes, and a green GOOD verdict.
MX Jump Builder on a phone: the drawing and verdict stay pinned while the gap and landing sliders scroll beneath them.

What we make

How it works

  1. 1SketchWhat it is, who it's for, and what ships first. Agreed on paper before anything is built.
  2. 2BuildDesign and engineering in the same hands, with working software in front of you early.
  3. 3ShipStore listings, the site, the graphics and video around it. Launched, not handed off.

In development

Built here, launching next.

Bring us your sketch.

A napkin, a voice memo, a half-built app. Tell us what you’re building and we’ll tell you what it takes.

We reply within one business day. No deck — a direct conversation about whether it’s feasible and what it would take.