Comparison

CHALLNA vs LOTP

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

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.

Highlights
  • Millisecond precision synchronization
  • One-touch server presets
  • Intuitive countdown timers
  • Click practice mode
  • Smart reminders and schedule registration
  • Direct site access
  • Dynamic Island support
Features
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โ–  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? Donโ€™t rely on your phoneโ€™s local time. Check the "Real Server Time" of the site itself. 'CHALLNA' will drastically increase your success rate. โ–  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 Koreaโ€™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. Weโ€™ll make sure youโ€™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) โ–  Highly Recommended For: โ€ข Concert fans tired of losing out in "Blood-keting" (bloody ticketing). โ€ข Students desperate to secure popular university courses. โ€ข Anyone needing perfect timing for holiday train bookings or limited drops. โ€ข Perfectionists who won't settle for even a 0.01-second error. โ–  Please Note: โ€ข Minor errors may occur depending on network conditions. We recommend using a stable Wi-Fi, 5G, or LTE environment. โ€ข 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!

About

LOTP

Features
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L.OTP๋Š” ๊ผญ ํ•„์š”ํ•œ ๊ธฐ๋Šฅ๋งŒ ๋‹ด์€ ๊ฐ„ํŽธํ•œ ์ผํšŒ์šฉ ์ธ์ฆ(OTP) ์•ฑ์ž…๋‹ˆ๋‹ค. ๋ณต์žกํ•œ ์„ค์ • ์—†์ด ๋ฐ”๋กœ ์“ธ ์ˆ˜ ์žˆ๋„๋ก, ์ฒซ ์‹คํ–‰ ์‹œ ์ž๋™ ๋“ฑ๋ก๋˜๋ฉฐ ๋ฐœ๊ธ‰๋ฐ›์€ QR ์ฝ”๋“œ๋ฅผ ์Šค์บ”ํ•˜๊ฑฐ๋‚˜ ์ง์ ‘ ์ž…๋ ฅํ•ด ๊ณ„์ •์„ ์ถ”๊ฐ€ํ•ฉ๋‹ˆ๋‹ค. ํฐ ๊ธ€์”จ์˜ ๋‹จ์ผ ํ™”๋ฉด์œผ๋กœ ์ธ์ฆ ์ฝ”๋“œ๋ฅผ ํ•œ๋ˆˆ์— ํ™•์ธํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. โ–  ๊ฐ„ํŽธํ•จ โ€ข ์ฒซ ์‹คํ–‰ ์ž๋™ ๋“ฑ๋ก โ€” ๋ณ„๋„ ๊ฐ€์ž…ยท๋กœ๊ทธ์ธ ์—†์ด ๋ฐ”๋กœ ์‚ฌ์šฉ โ€ข ๋‹จ์ผ ๊ณ„์ • ํฐ ํ™”๋ฉด โ€” ์ธ์ฆ ์ฝ”๋“œ๋ฅผ ํฌ๊ณ  ์„ ๋ช…ํ•˜๊ฒŒ ํ‘œ์‹œ โ€ข QR ์Šค์บ” + ๊ฐค๋Ÿฌ๋ฆฌ ์ด๋ฏธ์ง€ โ€” ์นด๋ฉ”๋ผ๊ฐ€ ๋ง‰ํžŒ ํ™˜๊ฒฝ์—์„œ๋„ ๋“ฑ๋ก ๊ฐ€๋Šฅ โ€ข ์ˆ˜๋™ ๋“ฑ๋ก โ€” ์‹œ๋“œ ํ‚ค ์ง์ ‘ ์ž…๋ ฅ โ–  ํ‘œ์ค€ ์ง€์› โ€ข ๊ตญ์ œ ํ‘œ์ค€ ํƒ€์ž„ ๋ฒ ์ด์Šค OTP(RFC 6238) ์ค€์ˆ˜ โ€ข ํ‘œ์ค€ otpauth QR ํ˜ธํ™˜ โ–  ๋ณด์•ˆ โ€ข 6์ž๋ฆฌ PIN ์ž ๊ธˆ / ์ƒ์ฒด์ธ์ฆ (Face ID, Touch ID) โ€ข ๋ฐฑ๊ทธ๋ผ์šด๋“œ ํ™”๋ฉด ๊ฐ€๋ฆฌ๊ธฐ โ€” ์•ฑ ์ „ํ™˜ ์‹œ ์ฝ”๋“œ ๋…ธ์ถœ ์ฐจ๋‹จ โ€ข ํด๋ฆฝ๋ณด๋“œ ์ž๋™ ๋น„์›€ โ€” ์ฝ”๋“œ ๋ณต์‚ฌ 30์ดˆ ํ›„ ์ž๋™ ์‚ญ์ œ โ€ข ์‹œ๋“œ ํ‚ค ์•ˆ์ „ ์ €์žฅ โ€” iOS Keychain โ–  ํŽธ์˜ โ€ข ๋‹คํฌ / ๋ผ์ดํŠธ ๋ชจ๋“œ ์ž๋™ ์ „ํ™˜ โ€ข 36๊ฐœ ์–ธ์–ด ์ง€์› โ€ข ์‹œ๊ฐ„๋Œ€ ๋ณด์ • โ€” ์ธ์ฆ ์„œ๋ฒ„์™€ ๊ธฐ๊ธฐ ์‹œ๊ณ„ ์ฐจ์ด ๋ณด์ • โ–  ์ง€์› OS โ€ข iOS 13.0 ์ด์ƒ โ–  ์ œ๊ณต SGA Solutions Co., Ltd. ํ™ˆํŽ˜์ด์ง€: https://www.sgasol.kr โ–  ๊ฐœ์ธ์ •๋ณด ์ฒ˜๋ฆฌ ๋ณธ ์•ฑ์€ OTP ์‹œ๋“œ ํ‚ค์™€ ๊ณ„์ • ์ •๋ณด๋ฅผ ๋””๋ฐ”์ด์Šค ๋‚ด๋ถ€์—๋งŒ ์ €์žฅํ•˜๋ฉฐ, ์™ธ๋ถ€ ์„œ๋ฒ„๋กœ ์ „์†กํ•˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค. ์ž์„ธํ•œ ๋‚ด์šฉ์€ ๊ฐœ์ธ์ •๋ณด ์ฒ˜๋ฆฌ๋ฐฉ์นจ์„ ์ฐธ์กฐํ•ด์ฃผ์„ธ์š”.

Screenshots

CHALLNA4 screens
LOTP4 screens

Verdict

The call

The clearest difference is iOS requirement: LOTP at 13.0 against CHALLNA's 16.6. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference ยท 7 level
CHALLNA versus LOTP: the parameters behind the verdict, then further details
ParameterCHALLNALOTP
PriceFreeFree
Positive reviews100.0% of reviewsโ€”
Update frequencyEvery 2 weeksโ€”
AdsNoNo
In-app purchasesNoNo
MonetizationFreeโ€”
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS16.613.0 โ€” better
Further details โ€” not scored
Size38 MB22 MB
Age rating4+4+
DeveloperRYNYULSGA Solutions CO.,ltd

In-app purchases

None

CHALLNA

No in-app purchases

None

LOTP

No in-app purchases

Questions

Is CHALLNA free?
CHALLNA is free to download, with no in-app purchases.
Is LOTP free?
LOTP is free to download, with no in-app purchases.
Do CHALLNA or LOTP have ads?
Neither CHALLNA nor LOTP shows ads.

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