React Universe App

Powered by Callstack

Only for iPhone

Free · Designed for iPhone

iPhone

Plan your day, connect with people, and explore events—all in one place. No login needed. Just create your badge and you’re in. Your event companion — powered by Callstack React Universe App helps you get the most out of every tech event. Whether you're attending a conference or meetup, this app makes it easy to connect, explore, and stay informed. No passwords or accounts — just sign up with your email and go.

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We fixed the bugs we found on the first day of the conference

Version 1.0.3

The developer, Callstack.io, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Contact Info
    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Diagnostics

Privacy practices may vary based, for example, on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

  • Provider
    • CALLSTACK IO SP Z O O
  • Size
    • 43.3 MB
  • Category
    • Business
  • Compatibility
    Requires iOS 15.1 or later.
    • iPhone
      Requires iOS 15.1 or later.
    • iPod touch
      Requires iOS 15.1 or later.
    • Mac
      Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
  • Languages
    • English
  • Age Rating
    4+
  • Copyright
    • © 2025 Callstack
  • Developer Website
  • Privacy Policy

    • More by Callstack.io