Independent iOS studio · Working remotely with clients worldwide
I help startups and businesses design, build and launch polished native apps for iPhone and Apple Watch.
Screens from Civio, an exam-prep app I built and shipped in Romanian, German and US editions.
Launching something new, fixing something that exists, or earning more from an app you've already shipped.
New product
For founders and companies that need to launch a polished native iOS product.
Existing app
For companies with an iOS app that's holding them back.
Monetization
Turn an existing iOS app into a properly monetized product.
Also available: Apple Watch and watchOS apps, SwiftUI development, and ongoing maintenance. Not sure which fits? Describe your app →
Every app below is live on the App Store. Each shows a different capability — from hardware integration to multi-market subscriptions.
Plus 26 apps in total on the App Store — see them all on the work page.
Everything here is public: open the App Store links and see for yourself.
*Average of ratings on the Romanian App Store, where most of my apps are rated. Reviews are quoted verbatim from real App Store users.
You're not choosing between agencies. You're choosing who will actually build your app.
Swift, SwiftUI and Apple's frameworks — every day. No cross-platform compromises, and no learning iOS on your budget.
vs. a generalist teamYou talk to the engineer who writes the code. No account managers, no hand-offs, no telephone game.
vs. a large agencyDecisions weigh UX, App Store rules, monetization and long-term maintainability — not just the ticket in front of me.
vs. a generic freelancerArchitecture, implementation, testing and App Store submission handled in one place, by one person accountable for all of it.
vs. splitting work across vendorsLow overhead and fast decisions. Time goes into your product, not into meetings about it.
vs. an offshore teamI use AI-assisted tooling to move faster, and every line is reviewed by me before it ships.
A simple, transparent path from first message to launch — and beyond.
I learn about your product, users and business goals, and where you are today.
We define the MVP or feature set, technical architecture and a delivery plan.
Iterative development with regular builds you can install and comment on.
QA, testing on real devices, performance checks and App Store compliance.
App Store preparation, submission and release.
Post-launch improvements, analytics and additional features.
ISTACK is an independent native iOS studio helping startups and businesses design, build, launch and improve high-quality iPhone and Apple Watch applications. I'm Mădălin Săvoaia — I lead every project and write the code myself.
I've been building iOS apps since 2015, and I also ship my own products: 26+ apps on the current App Store account, from fitness and travel to fleet tools and exam prep. That means I know first-hand what it takes to get an app through App Review, into users' hands and, where it makes sense, earning revenue.
Projects are delivered remotely. I'm based in Romania (UTC+2/+3), which overlaps fully with European working hours and partly with the US East Coast.
View LinkedIn profile ↗Tell me what you're building, where you are today, and what you need help with. A few lines is enough — I'll follow up with questions.