# 다대구 vs Second

다대구 and Second both sit at 5.0 stars, but that hides the real split: 88% of Second's written reviews are positive against 40% of 다대구's. Second also leads on update cadence (every 4 days vs fortnightly). 다대구's advantage is in-app purchases (none vs 1) and iOS requirement (13.0 vs 15.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Second sells 1 one-off in-app purchase. 다대구 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for 다대구 against 5.0 for Second. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews are what separate them: 40% of 다대구's written reviews are positive against 88% of Second's.

다대구 ships an update fortnightly, Second every 4 days. The most recent releases landed on September 16, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | 다대구 | Second |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/id1565818679/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/second-sync/id6752860014/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 40.0% of reviews | **88.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | — | Free |
| Size | 96 MB | 49 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [대구광역시](https://appshunter.io/developer/419058916) | [Minjun Kim](https://appshunter.io/developer/1841275054) |

## What reviewers say

### 다대구

[App page](https://appshunter.io/ios/app/id1565818679)

**Features:** Vision Pro support

**In-app purchases:** none


### Second

[App page](https://appshunter.io/ios/app/second-sync/id6752860014)

This utility app provides precise server time synchronization down to milliseconds, crucial for time-sensitive events like registrations and ticketing. It features drift tracking for sustained accuracy and a Picture-in-Picture timer for live monitoring while using other applications.

**Highlights:** Precise server time synchronization, Drift tracking for sustained accuracy, Picture-in-Picture (PiP) timer, Example site shortcuts, Multilingual support

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 초정확 Pro 업그레이드 | $1.99 | one-time |


## Frequently asked questions

### Is 다대구 free?

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

### Is Second free?

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

### Which has better reviews, 다대구 or Second?

다대구 and Second are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do 다대구 or Second have ads?

Neither 다대구 nor Second shows ads.

### Which is updated more often, 다대구 or Second?

다대구 ships an update fortnightly, and Second every 4 days. Most recently, 다대구 was updated on September 16, 2026 and Second on September 23, 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.*