# Mobile IDentification App vs Second

The clearest difference is review sentiment: Second at 89% against Mobile IDentification App's 27%. Second also leads on rating (5.0 vs 2.4) and update cadence (every 4 days vs monthly). Mobile IDentification App's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, monetization model and iOS requirement there is nothing between them.

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

Second holds the better App Store score, 5.0 against 2.4. That said, the two scores are not equally well evidenced: Mobile IDentification App has 50 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 27% of Mobile IDentification App's written reviews are positive against 89% of Second's.

Mobile IDentification App ships an update monthly, Second every 4 days. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Mobile IDentification App | Second |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (50 ratings)](https://appshunter.io/ios/app/mobile-identification-app/id1599450372/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/second-sync/id6752860014/reviews)** |
| Number of ratings | **50** | 4 |
| Positive reviews | 27.5% of reviews | **88.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Free | Free |
| Size | 228 MB | 55 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [행정안전부](https://appshunter.io/developer/431558537) | [Minjun Kim](https://appshunter.io/developer/1841275054) |

## What reviewers say

### Mobile IDentification App

[App page](https://appshunter.io/ios/app/mobile-identification-app/id1599450372)

This app allows you to store and use government-issued digital identification cards on your smartphone. It offers the same legal validity as physical IDs, providing a convenient and secure way to verify your identity for various purposes.

**Highlights:** Mobile Resident Registration Card, Mobile Driver's License, Mobile National Veterans Registration Card, Mobile Overseas Koreans Identity Verification Card, Secure smartphone storage, Same legal effect as traditional IDs

**Features:** macOS Compatibility

**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 Mobile IDentification App free?

Mobile IDentification App 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, Mobile IDentification App or Second?

Second is rated higher. Mobile IDentification App averages 2.4 out of 5 from 50 ratings, while Second averages 5.0 from 4 ratings.

### Do Mobile IDentification App or Second have ads?

Second shows ads; Mobile IDentification App does not.

### Which is updated more often, Mobile IDentification App or Second?

Mobile IDentification App ships an update monthly, and Second every 4 days. Most recently, Mobile IDentification App was updated on October 13, 2026 and Second on October 11, 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.*