# Sumbi vs Cat's Study

The clearest difference is ads: Sumbi at none against Cat's Study's shown. Sumbi also leads on monetization model (free vs free with in-app purchases). On price, review sentiment, update cadence and in-app purchases there is nothing between them.

Both are free to download. Sumbi sells 3 one-off in-app purchases and Cat's Study sells 6 in-app purchases, starting at $2.49 per month. Whichever you choose, the download price is not the number that matters.

Sumbi ships an update weekly, Cat's Study every 5 days. Both last shipped on October 29, 2026.

## The numbers

| Metric | Sumbi | Cat's Study |
| --- | --- | --- |
| 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 | Yes |
| Ads | **No** | Yes |
| Update frequency | Weekly | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 94 MB | 186 MB |
| Requires iOS | **16.4** | 16.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [나이스데이](https://appshunter.io/developer/1751418356) | [Lo-Fi Labs Inc.](https://appshunter.io/developer/6796905768) |

## 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 |


### Cat's Study

[App page](https://appshunter.io/ios/app/cats-study-focus-timer/id6816829300)

Enhance your focus with a charming virtual cat companion. This app offers customizable Pomodoro timers, task planning, and progress tracking. Personalize your study space with various themes and ambient sounds, and connect with friends for collaborative focus sessions.

**Highlights:** Customizable Pomodoro and stopwatch timers, Task planning and scheduling, Focus time tracking and streaks, Ambient soundscapes and room themes, Social focus sessions with friends, Cat and room customization

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cat's Study Pro Monthly | $2.49 | per month |
| Cat's Study Pro Annual | $14.49 | per year |
| 100 Coins | $1.49 | one-time |
| 500 Coins | $6.49 | one-time |
| 1,000 Coins | $9.99 | one-time |
| Cat's Study Pro Lifetime | $33.49 | one-time |


## Frequently asked questions

### Is Sumbi free?

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

### Is Cat's Study free?

Cat's Study is free to download, with in-app purchases available.

### Do Sumbi or Cat's Study have ads?

Cat's Study shows ads; Sumbi does not.

### Which is updated more often, Sumbi or Cat's Study?

Sumbi ships an update weekly, and Cat's Study every 5 days. Most recently, Sumbi was updated on October 29, 2026 and Cat's Study on October 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*