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ERSI d.o.o.ERSI d.o.o.

Modern iOS Apps.
Built for Security & Speed.

ERSI d.o.o. is a team of experts crafting premium iOS applications that elevate user experience and protect mobile devices — from powerful VPN solutions to intelligent device cleaners.

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ERSI d.o.o. team

Est. in Slovenia

ERSI d.o.o.

/ About Us

A dedicated team
of iOS specialists.

ERSI d.o.o. is a Slovenian software company focused exclusively on the iOS ecosystem. We build applications that combine elegant design with powerful functionality — helping users stay secure, private, and in control of their devices.

Our team brings together deep expertise in mobile security, system optimization, and user experience design. Every product we ship reflects our commitment to quality, performance, and the highest standards of user privacy.

/ Our Products

iOS Apps Built for You

Every product from ERSI d.o.o. is crafted exclusively for the iOS platform — native, fast, and beautifully designed.

ERSI VPN
Security

ERSI VPN

Secure. Private. Fast.

A high-performance VPN for iOS that encrypts your internet connection, hides your IP address, and keeps your online activity completely private — wherever you are.

  • Military-grade AES-256 encryption
  • Zero-log policy
  • Global server network
  • One-tap connect
ERSI Cleaner
Optimization

ERSI Cleaner

Optimize. Free. Refresh.

An intelligent iOS cleaner that removes junk files, duplicate photos, and unnecessary data — freeing up storage space and keeping your device running at peak performance.

  • Smart junk detection
  • Duplicate photo finder
  • Memory optimizer
  • Battery health tips
All products are built exclusively for Apple iOS devices
/ Why Choose Us

Why Choose
ERSI Apps.

Every feature in our iOS applications is designed with one goal in mind: giving you a faster, safer, and cleaner mobile experience. Here is what sets ERSI d.o.o. products apart.

Military-Grade Encryption

AES-256 bit encryption protects every byte of your data, making it unreadable to anyone trying to intercept your connection.

Zero-Log Privacy

We never store, track, or share your browsing activity. Your digital footprint stays yours — always.

Blazing Fast Performance

Optimized iOS-native code ensures minimal battery drain and maximum speed, whether you're browsing or streaming.

Deep Device Cleaning

Intelligently scans and removes junk files, cache data, and duplicate media to reclaim valuable storage space.

Seamless iOS Integration

Built from the ground up for iOS — fully optimized for the latest Apple hardware and software updates.

Dedicated Support

Our team is always available to help. Fast, friendly, and knowledgeable support for every user.

/ Our Team

Expert iOS
Developers.

We believe every iOS user deserves apps that are fast, secure, and beautifully designed. ERSI d.o.o. was founded on that principle.

Lead iOS Engineer

10+ years building native iOS apps. Expert in Swift, SwiftUI, and mobile security architecture.

UX & Product Designer

Passionate about crafting intuitive interfaces. Leads design for all ERSI d.o.o. iOS products.

Security Engineer

Cybersecurity specialist focused on VPN protocols, encryption standards, and iOS privacy frameworks.

Backend & DevOps

Manages server infrastructure, CI/CD pipelines, and ensures 99.9% uptime for all ERSI services.

We believe every iOS user deserves apps that are fast, secure, and beautifully designed. ERSI d.o.o. was founded on that principle.

— ERSI d.o.o. Leadership Team

/ Contact

Get in touch
with the team.

Have a question about our iOS products or want to learn more about ERSI d.o.o.? We would love to hear from you.

Address

Zgornje Bitnje 101A
Zabnica, 4209
Slovenia

Email

info@ersidoo.net

Phone

+1 7752696704