This app helps you achieve precise timing for critical online events by displaying accurate server time, accounting for network latency. It offers one-touch presets for popular sites, countdown timers, and practice modes to improve your reaction speed for ticket sales, course registrations, and limited drops.
1.0.3
March 27, 2026
Server time synchronization has been improved. App performance has been stabilized.
CHALLNA's main purpose is to provide users with the precise server time of websites, accounting for network latency. This helps users achieve perfect timing for critical online events like concert ticket sales or course registrations.
CHALLNA calculates network latency (RTT) and average transmission deviations in real-time to correct errors, aiming for 0.01-second accuracy. This goes beyond simply fetching local server time.
Yes, CHALLNA is highly recommended for concert fans experiencing 'blood-keting.' It offers one-touch presets for popular ticketing sites like Interpark and YES24, along with countdown timers and practice modes to improve your chances.
No, CHALLNA is ad-free. The app is available for free and does not contain advertisements, allowing for an uninterrupted user experience.
CHALLNA is compatible with iPhones and iPads. Dynamic Island support is available on iPhone 14 Pro and later models.
The latest version, 1.0.3, was released on March 27, 2026. While specific update frequency isn't detailed, the app has received updates since its release on February 28, 2026.
CHALLNA has an age rating of 4+. This indicates it is suitable for a wide range of users, including children.
Yes, CHALLNA includes an 'On-the-Dot Click Practice' feature. This allows you to check your reaction speed and train yourself to click at precisely 0.00 seconds, which is crucial for high-pressure online events.
