AppComing soon on Google Play
Cielo
Tonight's sky, calculated on your phone.
Point your phone at the night sky and a calm voice tells you what you're looking at. No account, no ads, no tracking.
Independent mobile studio
Mobile apps built for the deep end.
Nyxmar designs, builds and ships iOS and Android apps, from first idea to both app stores.
What we build
New products, apps that need rescuing, and everything between the code and the store listing.
New apps & MVPs
From idea to both app stores. We help you define what the first version really needs, build it with React Native and Expo, and ship it to the App Store and Google Play.
Rescue & modernization
Stuck on an old Expo SDK, crashing in production or rejected by the stores? We upgrade SDKs, move the app to the New Architecture and make it stable again.
Store publishing
Listings, screenshots, privacy forms, review and release. We know how App Store and Google Play review works, and we plan for it from day one.
Backend & integrations
When the product needs it: NestJS APIs, authentication, payments, databases and AWS, sized for your app and never over-engineered.
How we work
Four steps, each one a little deeper. You always know where the project stands and what comes next.
Discovery
We talk through the problem, your users and your constraints, then tell you plainly what we'd build first and what we'd leave out.
Design & plan
Screens, scope and a technical plan you can actually read, so you know what's coming before any code is written.
Build
Weekly deliveries you can install on your own phone. Real progress every week, not a big reveal at the end.
Launch & support
We take the app through store review and launch, then stay on for fixes, updates and the next version.
Why Nyxmar
Direct access
You talk to the people building your product. No account managers, no layers in between.
Shipped, not just built
We publish and maintain our own apps, so we know store review from the inside.
Built to last
Clean architecture and strict TypeScript. Code your team can inherit and keep building on.
Your time zone
Based in Argentina (UTC−3), with working hours that overlap the Americas and Europe's afternoon.
Our work
Apps and games we design, publish and maintain ourselves.
GameIn development
Hostfall
Survive the night. Or become it.
A top-down tactical shooter for phones: eight players, humans against zombies, in a city at night.
About the studio
Nyx was the Greek goddess of night; mar is Spanish for sea. Nyxmar is the sea at night: the line where black water dissolves into a sky full of stars.
That is how we approach software.
- Calm on the surface
- An app that feels simple and does what it promises.
- Depth underneath
- Architecture, performance and care that hold up long after launch.
We stay small and senior by choice: fewer projects, full attention, and a direct line to the people doing the work.
- Córdoba, Argentina
- GMT-3
- English & Spanish
- iOS & Android
- React Native
- Expo
Founded by Lucas Ribotta and Ignacio Castro in Córdoba, Argentina.
Have something that needs to surface?Start a project
Start a project
Tell us what you're building and where you are. We'll reply within 48 hours with next steps, or an honest “this isn't a fit”.
Prefer email? hello@nyxmar.com