# CHALLNA vs 카드피커

The clearest difference is in-app purchases: CHALLNA at none against 카드피커's 3. CHALLNA also leads on ads (none vs shown). 카드피커's advantage is update cadence (every 4 days vs every 2 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 카드피커 sells 3 in-app purchases, starting at $1.99 per month. CHALLNA asks for nothing beyond the download.

CHALLNA ships an update every 2 weeks, 카드피커 every 4 days. The most recent releases landed on October 12, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | CHALLNA | 카드피커 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 38 MB | 94 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RYNYUL](https://appshunter.io/developer/580531175) | [DONGWOO KIM](https://appshunter.io/developer/1882321729) |

## What reviewers say

### CHALLNA

[App page](https://appshunter.io/ios/app/challna-precise-server-clock/id6759583731)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 카드피커

[App page](https://appshunter.io/ios/app/ai/id6761686211)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 카드피커 프리미엄 | $1.99 | per month |
| 카드피커 VIP | $19.99 | per month |
| 카드피커 프리미엄 초기화 | $0.49 | one-time |


## Frequently asked questions

### Is CHALLNA free?

CHALLNA is free to download, with no in-app purchases.

### Is 카드피커 free?

카드피커 is free to download, with in-app purchases available.

### Do CHALLNA or 카드피커 have ads?

카드피커 shows ads; CHALLNA does not.

### Which is updated more often, CHALLNA or 카드피커?

CHALLNA ships an update every 2 weeks, and 카드피커 every 4 days. Most recently, CHALLNA was updated on October 12, 2026 and 카드피커 on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*