# DODI vs Sumbi

The clearest difference is review sentiment: Sumbi at 100% against DODI's 50%. Sumbi also leads on monetization model (free vs free with in-app purchases). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. DODI sells 2 in-app purchases, starting at $3.99 per month and Sumbi sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

DODI ships an update every 11 days, Sumbi weekly. The most recent releases landed on October 21, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | DODI | 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 | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 295 MB | 94 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Seonhyo Kim](https://appshunter.io/developer/1724612424) | [나이스데이](https://appshunter.io/developer/1751418356) |

## What reviewers say

### DODI

[App page](https://appshunter.io/ios/app/dodi-screen-time/id6504601061)

This app helps you manage your phone usage by sending alerts for continuous use and encouraging short breaks. It tracks your daily rest time, promoting healthier digital habits.

**Highlights:** Continuous usage alerts, 10-second break reminders, Daily rest time tracking, Promotes healthier digital habits

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DODI (1 month) | $3.99 | per month |
| DODI (1 year) | $17.99 | per year |


### 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 DODI free?

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

### Is Sumbi free?

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

### Do DODI or Sumbi have ads?

Neither DODI nor Sumbi shows ads.

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

DODI ships an update every 11 days, and Sumbi weekly. Most recently, DODI was updated on October 21, 2026 and Sumbi 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.*