# 모바일 알파캐셔 vs Sumbi

The clearest difference is in-app purchases: 모바일 알파캐셔 at none against Sumbi's 3. 모바일 알파캐셔 also leads on device support (3 vs 1) and iOS requirement (11.0 vs 16.4). Sumbi's advantage is update cadence (weekly vs every 5 weeks). On price and ads there is nothing between them.

Both are free to download. Sumbi sells 3 one-off in-app purchases. 모바일 알파캐셔 asks for nothing beyond the download.

모바일 알파캐셔 ships an update every 5 weeks, Sumbi weekly. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 모바일 알파캐셔 | Sumbi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sumbi-study-focus-timer/id6802502926/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | — | Free |
| Size | 43 MB | 94 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Un-Jae Kim](https://appshunter.io/developer/1240041393) | [나이스데이](https://appshunter.io/developer/1751418356) |

## What reviewers say

### 모바일 알파캐셔

[App page](https://appshunter.io/ios/app/id1620826700)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sumbi

[App page](https://appshunter.io/ios/app/sumbi-study-focus-timer/id6802502926)

This app encourages users to spend less time on their phones by gamifying digital detox. Users engage in timed "dives" away from their devices, earning virtual sea creatures based on their focus duration. It offers a peaceful, non-punitive approach to building healthier digital habits.

**Highlights:** Timed phone-free dives, Unlock virtual sea creatures, Personalized ocean environment, Buddy dive feature, Night sea creatures, Diary-like dive log

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shallow Sea Creature | $0.99 | one-time |
| Deep Sea Creature | $1.99 | one-time |
| Abyssal Creature | $2.99 | one-time |


## Frequently asked questions

### Is 모바일 알파캐셔 free?

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

### Is Sumbi free?

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

### Do 모바일 알파캐셔 or Sumbi have ads?

Neither 모바일 알파캐셔 nor Sumbi shows ads.

### Which is updated more often, 모바일 알파캐셔 or Sumbi?

모바일 알파캐셔 ships an update every 5 weeks, and Sumbi weekly. Most recently, 모바일 알파캐셔 was updated on October 27, 2026 and Sumbi on October 31, 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.*