# Sumbi vs NightMeow

The clearest difference is in-app purchases: NightMeow at none against Sumbi's 3. Sumbi's advantage is update cadence (weekly vs every 2 weeks). On price, review sentiment, ads and monetization model there is nothing between them.

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

Sumbi ships an update weekly, NightMeow every 2 weeks. Both last shipped on October 29, 2026.

## The numbers

| Metric | Sumbi | NightMeow |
| --- | --- | --- |
| 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 | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free | Free |
| Size | 94 MB | 10 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [나이스데이](https://appshunter.io/developer/1751418356) | [subin kang](https://appshunter.io/developer/6806336274) |

## What reviewers say

### 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 |


### NightMeow

[App page](https://appshunter.io/ios/app/nightmeow-cat-study-timer/id6812408292)

This app helps you focus by using a cute cat-themed timer. As you study, virtual cats appear and grow, rewarding your concentration. You can also block distracting apps and websites, and view your progress in a daily room.

**Highlights:** Cat-themed focus timer, Collectible feline companions, Distraction blocking, Lock Screen Live Activities, Daily room for records, Customizable study day start

**In-app purchases:** none


## Frequently asked questions

### Is Sumbi free?

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

### Is NightMeow free?

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

### Do Sumbi or NightMeow have ads?

Neither Sumbi nor NightMeow shows ads.

### Which is updated more often, Sumbi or NightMeow?

Sumbi ships an update weekly, and NightMeow every 2 weeks. Most recently, Sumbi was updated on October 29, 2026 and NightMeow on October 29, 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.*