cyrks. · Native apps for the Apple ecosystem

Q: What does maintenance include after launch?

We agree it in writing before starting: compatibility with new iOS versions, bug fixes and small tweaks. New features are quoted separately, and everything is documented.

Feature	Wrapper (web in a WebView)	Native
Performance & scroll	Depends on the WebView: jank and blank waits	Smooth, system gestures, no reloads
Offline	Blank screen or error	Local data: keeps working
Apple integration (Watch, Wallet, widgets, Shortcuts)	Limited or none	Native, first-class
Sign-in & security	Web forms	Face ID / Touch ID and Keychain
iOS updates	You react when something breaks	You adapt before it ships

Services

From idea to App Store — no shortcuts.

I handle the whole lifecycle —design, native code, launch and evolution— and make sure you always know what's happening and what it costs.

What I do

Native development

Apps for iPhone, iPad, Mac, Apple Watch and Vision Pro, built from scratch in Swift and SwiftUI.

Modernization

Redesign of existing apps or webviews into fast, fluid, modern native experiences.

Integrations & APIs

I connect your app with your REST APIs and Apple services: HealthKit, CloudKit and more.

Maintenance

Continuous evolution, compatibility with new iOS versions, and post-launch support.

How I work · no surprises

Free initial consultation

We talk through your idea or your current app and what you want to achieve. No strings attached.

Proposal & fixed quote

Scope, timeline, and fixed price in writing. No surprises.

Phased development

Iterative deliveries: you see your app progress at every phase.

Launch & support

App Store publication and ongoing support afterwards.

Technical audit

Two weeks reading your code to tell you what you've got, what can be saved, and what it costs to fix. With numbers, not impressions.

I do the audit myself. No junior assigned, no account manager. You talk to the person reading the code.

€4,500 · VAT not included.
Two weeks from the moment I get access to the repository.
If you hire the project within the next 60 days, it's fully credited.
Standard consumer app, up to three main modules. If your case is bigger, we talk and I tell you what changes.
I take two audits a month.

It costs less than a month of development, and it's the difference between rebuilding what's needed and rebuilding what isn't.

Let's talk about the audit →

What do I need to get started?

Read access to the repository and a moment to tell me what worries you. If you can also give me access to your App Store Connect stats and reviews, even better, but it's not essential. With the code I can start. If it's held by a provider who no longer replies, we sort that out first: what matters is being able to read it.

What if nothing needs rebuilding in the end?

Better for you. I hand you the report anyway, separating what's worth touching —there's almost always something: Watch, widgets, performance— from what can stay as it is. Telling you “don't rebuild it” is part of the job, not a failure: you pay for the diagnosis, not for me selling you a big project.

Who owns the code and the report?

You do. The report is yours the moment I deliver it, to use with whoever you want, even another developer. And if we end up doing the project, the app ships under your developer account and you keep the whole codebase. I don't hold anything hostage.

What about Android?

I don't build it myself — my craft is the Apple ecosystem, and that's where I guarantee truly native quality. But if you need Android, I can manage it for you: I work with trusted Android developers, quote it separately, and stay on as the project's technical lead. A single point of contact answering for both platforms — you don't have to juggle two providers yourself.

Custom-built

No app yet? We start from your idea.

Not everything starts with legacy code. If you have a business process —appointments, time-tracking, inventory, clients— running today on paper, a spreadsheet or a generic tool that doesn't fit, I'll build you a native app made to measure, from scratch.

A call, not an audit

There's no code to review — there's a problem to understand. We start by talking.

Fixed scope, timeline and price

Agreed before writing a line. No surprises, no open-ended quotes.

The app is yours

It ships under your account, you keep the code, built to the same native standard as everything else.

I've done exactly this: OnBoard (appointments & clients), OutATime (time-tracking, built for a client) and Turnativo (shifts) all started this way.

Tell me about your idea →

Portfolio

14 published apps. All native.

I don't just tell you what I can do — I show you on the App Store.

OnFactu

Create and issue invoices and quotes in seconds, with automatic VAT/IRPF and branded PDFs. Compliant with Spain's RD 1007/2023: SHA-256 hash chain, official AEAT QR, and electronic signature (XAdES-EPES) using your digital certificate. Quarterly summaries and exports (PDF, CSV, XML) ready for your accountant. 100% native, all on your Mac and private iCloud: no servers of ours, no telemetry.

How it complies with VeriFactu →

SwiftUI SwiftData CloudKit StoreKit 2 CryptoKit libxml2

Turnativo

Shift and work-schedule app that turns your rota into real events in your Apple Calendar, synced automatically through iCloud across iPhone, iPad, Mac and Apple Watch. Rotating patterns that fill your month, paint mode, overlap alerts and widgets. 100% native, no servers, no telemetry.

SwiftUI SwiftData EventKit WidgetKit StoreKit 2 TipKit

Apunto Studio

Two-tool native macOS suite: transcribes long recordings (classes, interviews, meetings) and dictates into any text field by holding fn. All on-device with Apple Intelligence — no servers, no telemetry.

Foundation Models SwiftUI SpeechAnalyzer AVFoundation StoreKit 2

OnStream

Live streaming and video recording from Apple Vision Pro to Twitch and YouTube, using your Persona as camera with customizable backgrounds, audio mixing, and integrated chat.

SwiftUI AVFoundation VideoToolbox AudioToolbox Network.framework async/await

Rastro

Logic and deduction game with a free daily challenge, over 10 million unique combinations, and native Liquid Glass design.

SwiftUI Liquid Glass StoreKit 2 Backtracking/CSP String Catalogs async/await

OutATime

Native time-clock system for small businesses, compliant with Spanish labor law (Art. 34.9). Kiosk mode, no servers, iCloud sync, and PDF/CSV export. Commissioned project built for a client.

SwiftUI SwiftData CloudKit StoreKit 2 PDFKit CryptoKit

Envero

Wine

OnLock

Encrypted document vault

Apunto

Record, transcribe, organize

OnBD2

Analyze your car with OBD-II

OnShelf

Your personal library

OnBoard

Appointments & clients

OnLeitner

Flashcards, Leitner method

Campanar

The system time in Catalan

Background

Over 14 years inside the Apple world.

From managing operations at Apple Retail to developing native apps for businesses. I know the platform from the inside: the quality standards, user experience, and attention to detail that Apple demands.

Oct 2025 – Feb 2026

Swift Developer Program

Apple Coding Academy

Development of 100% native apps with SwiftUI and SwiftData, zero third-party dependencies.
Modern concurrency with async/await and a focus on current native APIs.
Custom architectures driven by clarity, performance, and maintainability.

2011 – 2025

Operations Specialist

Apple Retail

Over a decade inside Apple, obsessed with the user experience: 100% NPS sustained for consecutive months through a focus on detail, clarity, and the individual.
Adaptability and judgment: cross-functional work with Retail Technology and IS&T, navigating the constant evolution of the Apple ecosystem with ease.

Main Stack

Swift 6 SwiftUI SwiftData StoreKit 2 CloudKit async/await

Other frameworks

CoreBluetooth Network WatchConnectivity AVFoundation Vision

Backend & Tools

Vapor Leaf Git App Store Connect TestFlight Railway

FAQ

Before you ask

Who publishes the app and under which account?

Under your own Apple Developer account, in your name and under your control. If you don't have one yet, I help you set it up. The app, the code and the keys are yours: you don't depend on me to update it or to stay on the App Store.

What does maintenance include after launch?

We agree it in writing before starting, no fine print. Usually: compatibility with new iOS versions, bug fixes and small tweaks. New features are quoted separately. And if you'd rather run it yourself or with another team, it's documented so you can.

How is a project billed?

Fixed price agreed before starting, paid in phases against deliverables: not everything upfront, not everything at the end. You see the app progress and pay for what's already done. Spanish invoice with VAT, as a freelance.

What if the project stops halfway?

You keep what's been delivered and paid up to that point: code, accounts and documentation. No penalties, nothing held hostage. Working in phases exists precisely for this: so you can stop at a milestone without losing everything.

I work alone. What happens if I'm not around?

I'll be honest: I'm one person, with the schedule that implies —that's why fixed prices and phased timelines. The code is 100% native, standard, with no odd dependencies, and documented so any Swift developer can pick it up. I don't lock you to me.

From web experiences to native products.

Is it really an app — or just your website inside one?

Sound familiar?

Not every wrapper needs rebuilding.