TimeSeeker vs CHALLNA
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
TimeSeeker
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TimeSeeker is a relative-time timezone app. Unlike standard world clocks that show independent times, TimeSeeker shows time in other cities relative to your chosen base city - with clear offsets like "+7.5h" or "-11.5h" and date labels. FEATURES - Relative Time View β Select a base city and instantly see how time compares across all your locations with clear offset labels. - Time Scrubber β Drag the ruler-style slider to plan meetings up to 36 hours ahead or behind and see equivalent times everywhere. - Communication Hours β Color-coded indicators show whether it's a good, marginal, or poor time to reach someone in another city. - 486 Cities Worldwide β Search by city name, country, or common aliases like USA, UK, and UAE. - Reorderable List β Drag to rearrange your cities. Your base city stays pinned at the top. - Works Offline β All timezone calculations happen on your device. No internet required. - No Ads, No Tracking β Zero analytics, no accounts, no data collection. Your data stays on your device. PERFECT FOR - Remote teams coordinating across global offices - Families and friends in different countries - Frequent travellers and expatriates - Anyone scheduling across time zones
CHALLNA
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.
- Millisecond precision synchronization
- One-touch server presets
- Intuitive countdown timers
- Click practice mode
- Smart reminders and schedule registration
- Direct site access
- Dynamic Island support
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β 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? Donβt rely on your phoneβs local time. Check the "Real Server Time" of the site itself. 'CHALLNA' will drastically increase your success rate. β 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 Koreaβs 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. Weβll make sure youβre 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) β Highly Recommended For: β’ Concert fans tired of losing out in "Blood-keting" (bloody ticketing). β’ Students desperate to secure popular university courses. β’ Anyone needing perfect timing for holiday train bookings or limited drops. β’ Perfectionists who won't settle for even a 0.01-second error. β Please Note: β’ Minor errors may occur depending on network conditions. We recommend using a stable Wi-Fi, 5G, or LTE environment. β’ 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!
Screenshots
Verdict
TimeSeeker and CHALLNA are too close to call on the numbers: across 5 compared parameters β price, ads, in-app purchases and device support among them β neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | TimeSeeker | CHALLNA |
|---|---|---|
| Price | Free | Free |
| Positive reviews | β | 100.0% of reviews |
| Update frequency | β | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | β | Free |
| Devices | iPhone | iPhone, iPad β better |
| Requires iOS | 17.0 | 16.6 β better |
| Further details β not scored | ||
| Size | 5 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | Praveen Kumar Srinivasan | RYNYUL |
In-app purchases
TimeSeeker
No in-app purchases
CHALLNA
No in-app purchases









