App Intel

CHALLNA: Precise Server Clock

LiveRYNYUL6 apps · 156.7K installsToolsFree · contains adscom.rynyul.challna

0.01 seconds make all the difference in ticketing and course registration.

Alert me★ WatchOpen in Play ↗
Total installs
151
exact · Play shows 100+
Installs / day
0
since last crawl
Rating
—★
— ratings · — reviews
Released
22 Feb 2026
8mo ago
Last update
27 Mar 2026
v1.0.3 · 7mo ago
Countries
—
not checked yet

Install history

exact counter from Google Play
147.5160.6173.7186.920011 Oct12 Oct12 Oct
147.5160.6173.7186.920011 Oct12 Oct12 Oct

Installs per day · last 90 days

Not enough history yet — check back tomorrow

Change timeline

No changes recorded yet. We compare every crawl with the previous one and list title, icon, screenshots, description, version, price and availability changes here.

Country availability

Availability has not been checked for this app yet. “Check all countries” looks the app up in about 140 Google Play storefronts and shows where it is live, listed but not installable, or missing — plus any country-specific (custom) store listings.

Top countries

Country data will be available soon.

We estimate where downloads come from using the app’s position in Google Play’s top charts in about 140 countries. This app is not in any chart we have collected yet; the estimate appears as soon as it is.

Top chart positions

Not in any tracked top chart.

App manifest

Read this app's manifest from Google Play: permissions, declared SDKs, components and AdMob app ID. Saved analysis appears here automatically.

Manifest analysis reads only the required APK ranges. Base APK downloads may need separate device splits to install.

Data safety

declared by the developer on Google Play
  • No data shared with third parties
  • No data collected
  • Follows the Play Families Policy

This is the developer's own declaration, summarised from the Play listing. The permissions below show what the app is technically able to access.

Permissions

7 in 1 group
0 Sensitive2 Notable5 Routine
OtherNotable7

Access to miscellaneous device features that don't fit other categories

  • Start itself automatically as soon as your phone finishes turning onrun at startup · RECEIVE_BOOT_COMPLETED
  • Keep your phone's processor or screen from going to sleep, which can use more batteryprevent device from sleeping · WAKE_LOCK
  • Check whether you are online and whether you use Wi-Fi or mobile dataview network connections · ACCESS_NETWORK_STATE
  • Connect to the internet to load content and send datafull network access · INTERNET
  • Make your phone vibratecontrol vibration · VIBRATE
  • Check with Google Play that you got this app legitimatelyGoogle Play license check · com.android.vending.CHECK_LICENSE
  • Receive push messages sent from the app's servers over the internetreceive data from Internet · com.google.android.c2dm.permission.RECEIVE

Sensitive = can reach personal data, location, camera/mic or act on your behalf. Notable = changes how your device behaves. Routine = normal for almost every app. Source: Google Play's permission list for all versions of this app.

Store listing

Full description
■ 0.01 Seconds Make All the Difference. Have you ever missed out on popular concert tickets, course registrations, or limited-edition drops by a split second? Don’t rely on your phone’s local time. Check the "Real Server Time" of the site itself. 'CHALLNA' will drastically increase your success rate. ■ Why CHALLNA? (Key Features) 1. Millisecond(ms) Precision Synchronization We do more than just fetch server time. CHALLNA calculates network latency (RTT) and average transmission deviations in real-time to correct any errors. Find the "true" 0.01 second with Korea’s highest level of precision. 2. One-Touch Server Presets Interpark, YES24, Melon Ticket, and even major university registration sites! No need to type addresses manually. Simply search to instantly register and track your desired server. 3. Intuitive Countdown & Target Setting Set your goal time and watch the countdown in real-time down to the millisecond. Stay perfectly prepared for that high-pressure moment right before the opening. 4. Click Practice for Real-World Reflexes Theory is different from practice! Use the built-in 'On-the-Dot Click Practice' to check your reaction speed and master the feeling of clicking at exactly 0.00 seconds. 5. Smart Reminders & Schedule Registration (HOT!) Register your important ticketing or course registration schedules. We’ll make sure you’re ready with custom notifications before your target time, even in your busy daily life. 6. Direct Site Access Why check the time and switch apps separately? CHALLNA provides direct outlinks to the sites, shortening your access time to the absolute minimum. 7. Dynamic Island Support Keep tracking the time via Dynamic Island even while moving to the ticketing site, ensuring you never miss the countdown. (Available on iPhone 14 Pro and later models) ■ Highly Recommended For: • Concert fans tired of losing out in "Blood-keting" (bloody ticketing). • Students desperate to secure popular university courses. • Anyone needing perfect timing for holiday train bookings or limited drops. • Perfectionists who won't settle for even a 0.01-second error. ■ Please Note: • Minor errors may occur depending on network conditions. We recommend using a stable Wi-Fi, 5G, or LTE environment. • For the best results, be sure to use the 'Click Practice' feature in advance! Download 'CHALLNA' now and experience the miracle of 0.01 seconds!

What's new

Server time synchronization has been improved. App performance has been stabilized.

Growing in Tools

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