# 고려대학교_전자출입명부 vs CHALLNA

The clearest difference is iOS requirement: 고려대학교_전자출입명부 at 11.0 against CHALLNA's 16.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

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

## The numbers

| Metric | 고려대학교_전자출입명부 | CHALLNA |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 10 MB | 38 MB |
| Requires iOS | **11.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [alink Co., Ltd](https://appshunter.io/developer/1489689327) | [RYNYUL](https://appshunter.io/developer/580531175) |

## What reviewers say

### 고려대학교_전자출입명부

[App page](https://appshunter.io/ios/app/id1533769319)

**In-app purchases:** none


### 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


## Frequently asked questions

### Is 고려대학교_전자출입명부 free?

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

### Is CHALLNA free?

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

### Do 고려대학교_전자출입명부 or CHALLNA have ads?

Neither 고려대학교_전자출입명부 nor CHALLNA shows ads.

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

고려대학교_전자출입명부 ships an update fortnightly, and CHALLNA every 2 weeks. Most recently, 고려대학교_전자출입명부 was updated on October 4, 2026 and CHALLNA on October 12, 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.*