Custom software & apps,
at a fixed price
Web, mobile and AI products for businesses worldwide — a fixed quote in 24 hours, delivered in weeks. Built by the team that runs its own SaaS in production.
Services
What we do
From idea to production — engineering, AI integration, and product strategy.
Custom Software Development
We design, build and deploy custom web and mobile applications using modern frameworks like React, Next.js and Node.js. From concept to production-ready product, we handle the full development lifecycle.
SaaS Platform Development
Subscription-based software platforms with authentication, Stripe billing, admin dashboards, and automated workflows. Our SaaS products serve businesses across multiple industries.
Mobile Apps (iOS & Android)
Native and cross-platform mobile apps built with Swift, Kotlin or React Native / Expo. Published under our Apple Developer and Google Play organization accounts.
E-Commerce Solutions
End-to-end online stores with Stripe payments, product catalogs, order tracking, inventory sync and POS integration. Built to convert visitors into customers.
Products
Our portfolio
We build and operate our own SaaS products serving users worldwide.
Padelmondo
The all-in-one platform for padel & sports clubs
All-in-one SaaS for padel and sports clubs: real-time court booking, ELO player matching, tournament management, multi-club support, native player app and integrated payments — in 8 languages.
PadelRoll
LiveRun padel tournaments in minutes — Americano & Mexicano formats with live scoring, instant standings and one-link sharing. Web dashboard plus a native mobile app.
ClicStore
LiveAn online store for merchants with no website: snap a photo and AI cleans the image, reads the label and writes the listing — live in 30 seconds, with orders flowing in by WhatsApp.
Why Upstone
What you get, in writing
Concrete commitments — not adjectives.
You own the code
Full ownership of your project's code and IP transfers to you on final payment.
Milestone payments
Pay in stages as we ship. You see working software — and demos — at every step.
Fixed price in 24h
A clear written quote within one business day. No hourly billing, no surprises.
Documented & deployable
We hand over monitored, documented, deployable software — or run it for you.
What we build
Apps & platforms we can build for you
We can build almost any web or mobile product. Here are the kinds of apps and platforms we ship — tell us your idea and we'll make it real.
Booking & reservation platforms
Online scheduling, calendars, payments and automatic reminders — ideal for clubs, clinics, studios and service businesses.
AI assistants & chatbots
Custom AI assistants that answer questions, qualify leads and automate support, trained on your own content.
E-commerce & online stores
Stores with Stripe payments, product catalogs, inventory and order tracking — built to convert visitors into customers.
Marketplaces
Multi-vendor platforms that connect buyers and sellers, with profiles, payments, reviews and commissions.
SaaS platforms & dashboards
Subscription products with authentication, billing, admin panels and analytics, ready to scale.
Mobile apps (iOS & Android)
Native and cross-platform apps, published under our own Apple and Google organization accounts.
Ready to build your next product?
Tell us about your project and get a tailored proposal within 1 business day.