Opes
Live on iOSTrack income and expenses, manage assets and liabilities, and set financial goals — offline-first.
iOSAndroid
Open for one project from September
I build the whole app. Alone.
Design, code, App Store, and the unglamorous parts after launch. Expo, TypeScript and Supabase. Before this I worked in banking and economics, and I still run a short-term rental — which is why my apps keep landing in money and hosting.
4apps in flight
1live on the App Store
1client app under NDA
<24hreply time
Everything I'm working on, and exactly where it is
Updated 11 Aug 2026Apps & products
Everything I've built, and what's coming.
All built with React Native, Expo and TypeScript. iOS and Android, offline-first where it matters.
Hostkit
In testing — Sep 2026Track finances, sync calendars and manage guests — one app built for Airbnb and short-term rental hosts.
iOSAndroid
Momentum
In testing — Nov 2026Build a daily routine that sticks — track habits, keep streaks alive and schedule flexibly without the clutter.
iOSAndroid
Gymnazo
In testing — Dec 2026Offline-first bodyweight workouts with XP progression, daily streaks and unlockable achievements.
iOSAndroid
Client project
Under NDAContract work under an agreement I'm keeping. Shipped and in use — happy to talk through how it was built on a call.
iOSShipped
Building in public
All on @JalBuilds →Builds
Why Opes
has no charts
Why Opes has no charts on the home screen
0:48 on @JalBuildsLedger
in bigints
Never store money in a float. Here's what I use
0:36 on @JalBuildsiCal sync
is a lie
Calendar sync between two booking sites, honestly
1:02 on @JalBuildsApp Store
rejection
Rejected twice. What Apple actually wanted
0:59 on @JalBuilds4:30am
build log
What four hours of deep work actually produces
0:44 on @JalBuildsOne person,
one release
Shipping an update with nobody to review it
0:52 on @JalBuildsFreelance · fixed scope, fixed price
Work with me
01 · 4–6 weeks
MVP sprint
For a founder with an idea and no app yet.
- Screens designed before a line of code
- Expo app for iOS and Android
- Supabase database, auth and storage
- TestFlight build in your hands weekly
from $2,900fixed
02 · 2–3 weeks
Ship it
For a half-built app that never made it to the store.
- Fix the build and get it compiling
- Subscriptions wired with RevenueCat
- Store listing, screenshots and privacy
- Through App Review, however many rounds
from $1,400fixed
03 · one week
Audit & advice
For a live app that isn't growing or isn't earning.
- Walkthrough of the app as a new user sees it
- Stack and cost review, line by line
- Pricing and paywall recommendations
- A written plan you can hand to anyone
$600one-off
Not on the menu: web apps, backend work without a mobile app attached, or open-ended retainers — every package above ships as a fixed scope, start to finish.
Tell me what
you're building.
If it's a mobile app and it needs one person who can design it, build it and get it through App Review, we'll get on well. If it isn't, I'll tell you and point you somewhere better.
AvailableOne project from September 2026
Reply timeWithin one working day
TimezoneUTC+8 · overlap with EU mornings and US evenings
Emailhello@jalgabriel.com