iOS development workspace
2+
iOS Products
About Us

Building Excellencein Mobile Innovation

KELLER DOO NIS is a team of experts developing modern applications for the iOS platform. Our products, such as VPN and Cleaner, are designed to enhance user experience and improve the security of mobile devices.

Focused on mobile security and performance
Built exclusively for the iOS ecosystem
Experienced team with deep iOS expertise
Our Products

Crafted for iOS Excellence

VPN app
Secure & Private Browsing

VPN

Advanced VPN protection for your iOS device. Encrypt your internet traffic, mask your IP address, and browse securely on any network with military-grade encryption.

256-bit AES EncryptionZero-log PolicyGlobal Server NetworkAuto-connect Protection
Cleaner app
Optimize Your iPhone

Cleaner

Keep your iPhone running at peak performance. Remove junk files, free up storage space, and optimize system resources with one intelligent scan.

Smart Junk DetectionStorage OptimizerDuplicate FinderMemory Booster
Contact

Get in Touch

Reach out to the KELLER DOO NIS team — we're happy to hear from you.

Address
Ljubomira Nikolica 29Nis, 701750Serbia
Email
contact@kellerdoonis.com
Phone
+1 3613207240
KELLER DOO NIS© 2026 KELLER DOO NIS. All rights reserved.