Native Apple apps. Nothing in between.

We build, rescue, and migrate Swift and SwiftUI apps. On-device AI is the specialty.

What we take on

Four kinds of work, all in native Swift. On-device AI is the specialty →

Native App Development

We build native Swift and SwiftUI apps from scratch, from the first screen to App Store release. No wrappers, no cross-platform compromises, just an app that belongs on Apple's platforms.

App Rescue & Modernization

We take over stalled, broken, or aging Swift codebases and get them back to a stable, shippable state. This often means clearing dependency debt, replacing deprecated APIs, and rebuilding the parts that fight against Apple's current tools.

Native Migration

We take existing apps written in React Native, Flutter, Android, the web, or legacy Objective-C and rebuild them in native Swift. The product stays; the wrappers and non-native stack go, so what ships actually belongs on the platform.

Swift Testing

We write unit and UI tests using Swift Testing and XCTest so regressions get caught before your users do. Test coverage is planned alongside the architecture, not bolted on at the end.

One stack,six devices

The Swift is shared. The constraints are not.

iOS

iPhone

This is still where most apps live: a pocket, a notification, one hand. We design for that, not a tablet squeezed onto a smaller screen.

iPadOS

iPad

The iPad is not a big iPhone. We design for multitasking, pointer and keyboard, and Stage Manager, so the app uses the canvas instead of just filling it.

macOS

Mac

Real windows, menus, and keyboard shortcuts — AppKit and SwiftUI, not Catalyst as a shortcut. If an iPad app needs a proper Mac counterpart, we build one.

watchOS

Apple Watch

Watch apps live or die on glanceability: complications, short interactions, and battery. HealthKit when the product calls for it.

tvOS

Apple TV

TV interfaces run on focus, not touch — a ten-foot UI on the Siri Remote. Every screen has to work from the couch.

visionOS

Vision Pro

Spatial interfaces change the rules: depth, hands, and eyes instead of taps. We build a visionOS interface, not an iPhone screen hanging in space.

How developmentactually works

For a new app, four steps. Rescue and migration start with an audit of what you already have.

  1. 01

    Prototype

    Every idea needs a shape before it needs a real codebase. We build a quick, throwaway prototype so we can see it, touch it, and question it before committing real time to it.

  2. 02

    Design

    We define the interface and the flow, following Apple's Human Interface Guidelines. The goal is an app that feels native, not one that merely runs on the platform.

  3. 03

    Build

    This is where the app gets built, in Swift and SwiftUI — the first shippable version, then what comes after. Tests ride with the architecture, and we write code we are willing to maintain.

  4. 04

    Harden

    We check how the app holds up on real devices, under real conditions, then take it through App Store review. Anything fragile gets fixed here, before it becomes a support ticket.

The specialty: On-Device AI

Move an AI feature on-device, or build a new one that runs entirely on the phone.

  • No per-token bills — cost per query stays $0
  • Responses stay fast on any connection — no network round-trip, even offline
  • Data never leaves the device
  • Shipped in production, not slideware

The proof is WhattaRAG — on-device RAG, live on the App Store. Not a demo. See the story → · App Store →

$0per query — no per-token bill
Instantno network round-trip
~4 MBshipped app

With youthrough every step

Not a kickoff and then silence. A partner in the process, from the first prototype through the App Store.

You work with the people writing the code — not a PM who relays, not a junior team after the intro. We follow progress every day and put something real in your hands every week. Prototype, design, build, harden: the same people stay with the work.

More about AltoCode →

Let’s talk.

Tell us what you are building or what is broken, and we will tell you exactly how we would approach it.

We reply within one business day.