macOS 14+ · Apple SiliconSapoWhisper
Private, flexible dictation
Speak anywhere with ⌥ Space. Local MLX Whisper or realtime cloud engines, AI polish, auto-paste and history.
Steven Coaila Zaa — Full Stack & KMP Developer
I design and build native Mac apps, iOS products with a shared Kotlin core, backends and web experiences that feel fast, private and carefully made.
- 01 WebWeb that loads before you blink.
- 02 MobileOne Kotlin core, native on iOS and Android.
- 03 macOSMac apps that live in your menu bar.
Hello, I’m Steven
I build software end to end, from the first sketch to the signed release: menu bar apps that disappear into your day, a finance app for iPhone built on Kotlin Multiplatform, and the backends, CLIs and web pages behind them. Small, fast, private by default, and polished until it feels obvious.
- 6native Mac apps, free on GitHub
- 3platforms: web, mobile and macOS
- 6+years shipping production software
Selected work
Things I’ve built
Seven products across iPhone, Mac and the web, each one designed, built and shipped end to end.
LucasApp
Do more with your time.
Personal finance for iPhone. Snap a receipt or write a quick note and Lucas AI drafts the movement for you to review, with accounts, spending, subscriptions and loans in one place.
- Lucas AI reads receipts, vouchers and quick notes into reviewable movements
- Accounts, subscriptions, loans and more than 154 currencies
- Passkeys and 2FA, no bank login, a private backend and a companion CLI
- Kotlin Multiplatform
- Compose Multiplatform
- Swift
- Node.js
- PostgreSQL
SapoWhisper
Press ⌥ Space, speak, and your words land wherever you were typing. Transcribed privately on your Mac with MLX Whisper, or in realtime with Deepgram and ElevenLabs, with optional AI polish.
- Private on-device MLX Whisper plus batch and realtime cloud engines
- Pause and resume, AI polish, auto-paste and a searchable audio history
- Interrupted takes can be continued, with signed one-click updates
- Swift
- SwiftUI
- MLX Whisper
- Deepgram
- ElevenLabs
MacGauge
Safety-first fan control and live system stats for Apple Silicon. Watch temperatures and fan speed, set a verified manual speed or draw a temperature curve, and add CPU, memory and network modules to the menu bar.
- Manual and temperature-curve fan modes with safety limits
- CPU, memory and network menu bar modules with detailed popovers
- Efficient and Full performance modes, in English and Spanish
- Swift
- SwiftUI
- AppKit
- AppleSMC
- XPC
PeekOCR
Press ⇧ Space to grab text from anything on screen with on-device OCR. It also reads QR codes, takes annotated screenshots and records short GIF or MP4 clips.
- On-device OCR and QR detection straight to the clipboard
- Screenshots with live annotations, undo and redo
- GIF and MP4 clips with trim and export
- Swift
- SwiftUI
- AppKit
- Vision
- ScreenCaptureKit
TokenGauge
Claude Code and Codex quota at a glance: what is left, when it resets, whether it will last until the reset, and a yearly map of token activity, kept in a private local history.
- Codex, Claude and Unified views with independent quotas
- Stats with a reset forecast, daily tokens, models and effort
- No telemetry and no model requests, just local history
- Swift
- SwiftUI
- AppKit
- SQLite
- Sparkle
Encaje
Your space, your way. Draw your own window zones on a grid, give each one a shortcut and snap any window into place, on any display.
- Custom grid zones with undo, redo and fine tuning
- Your own shortcuts, and windows that move across displays
- Saved workspaces, plus pause or exclude any app
- Swift 6
- SwiftUI
- AppKit
- Accessibility
- Sparkle
WW2 Film Map
The world wars told through cinema. 222 films and series placed on a hand-built 3D globe with historical borders, a 1914–1945 timeline and cinematic 3D replays of key battles.
- A three.js globe with borders for 1914, 1920, 1930, 1938 and 1945
- Posters, fronts and events that move with a 1914–1945 timeline
- Cinematic 3D replays of battles like Normandy and Midway
- Nuxt 4
- Vue
- TypeScript
- three.js
- Sass
Made for your Mac
Six small apps, one menu bar
Free, native and built for Apple Silicon. Each one does a single job well and then gets out of your way.
- macOS 14+ · Apple Silicon
macOS 13+ · Apple SiliconMacGauge
Fan control & system stats
Temperatures, fan speed, manual or curve control, and CPU, memory and network modules in the menu bar.
macOS 15+ · Apple SiliconPeekOCR
OCR, screenshots & clips
Text and QR capture with ⇧ Space, annotated screenshots, and short GIF or MP4 screen clips.
macOS 14+ · Apple SiliconTokenGauge
AI coding quota at a glance
Claude Code and Codex quota, reset times, pace and token activity by day, week and year, stored locally.
macOS 14+ · Apple SiliconEncaje
Your space, your way
Draw window zones on a grid, assign shortcuts, move windows between displays and save workspaces.
macOS 15+ · Apple SiliconBuenMouse
Trackpad gestures for any mouse
Middle-click for Mission Control, middle-drag to switch Spaces, Ctrl + scroll to zoom and natural scrolling.
Experience
Where I’ve worked
From a junior frontend role to Kotlin Multiplatform, six years of shipping software for real people.
- 2020
Frontend Developer Junior at Alicorp
Peru
Built “Llegamos a tu casa”, from layout to features, with HTML, CSS, Tailwind CSS, JavaScript, React, Vue, Next.js and Nuxt.
- 2021 – 2023
Frontend Developer at Crack The Code
Lima, Peru
Rebuilt and improved the platform with React and TypeScript with SEO in mind, built the company back office and brought Facebook and Google events into the main site. Grew from part-time to full-time.
- Present
KMP / Mobile Developer at Talana
Peru
Mobile modernization with Kotlin Multiplatform: Android and iOS parity, cleaner shared app foundations and product-minded QA.
Toolbox
Tools I reach for
- TypeScript
- React
- Vue
- Nuxt
- Astro
- JavaScript
- GSAP
- Node.js
- PostgreSQL
- Prisma
- Swift
- SwiftUI
- Kotlin
- Kotlin Multiplatform
- Compose Multiplatform
- Android
- Flutter
- Docker
- Cloudflare
- Git
- GitHub
Side project
Iron Nest calculator
A small, unofficial helper for the video game Iron Nest: Heavy Turret Simulator. Built for a little less guesswork between rounds.
- Required elevation, live from azimuth, distance and powder charge
- Shot cards for two guns, drag and drop, and a saved volley history
- Keyboard-first, in English or Spanish, with no accounts or tracking
- Vue 3
- TypeScript
- Vite
- Inline SVG
