# Sumbi vs Jeejee

The clearest difference is monetization model: Sumbi at free against Jeejee's free with in-app purchases. Jeejee's advantage is device support (3 vs 1). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Sumbi sells 3 one-off in-app purchases and Jeejee sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Sumbi against 5.0 for Jeejee. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Sumbi ships an update weekly, Jeejee every 4 days. Both last shipped on October 29, 2026.

## The numbers

| Metric | Sumbi | Jeejee |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/sumbi-study-focus-timer/id6802502926/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/jeejee-markdown-latex-and-ink/id6812277576/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 94 MB | 91 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [나이스데이](https://appshunter.io/developer/1751418356) | [Youci Huang](https://appshunter.io/developer/1797438794) |

## 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 |


### Jeejee

[App page](https://appshunter.io/ios/app/jeejee-markdown-latex-and-ink/id6812277576)

This app combines Markdown, LaTeX, and handwriting for note-taking and document creation. It supports structured notes, mathematical typesetting, and annotation on PDFs with Apple Pencil. Documents can be exported in various formats and stored locally or in the cloud.

**Highlights:** Markdown editor with live preview, LaTeX typesetting engine, Handwriting with Apple Pencil, PDF annotation, Multiple export formats, Cloud and local file storage, Sticker store

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.29 | one-time |
| Sticker pack (tier NT$30) | $0.99 | one-time |
| Sticker pack (tier NT$60) | $1.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Sticker pack (tier NT$90) | $2.99 | one-time |
| Large Tip | $11.99 | one-time |


## Frequently asked questions

### Is Sumbi free?

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

### Is Jeejee free?

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

### Which has better reviews, Sumbi or Jeejee?

Sumbi and Jeejee are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Sumbi or Jeejee have ads?

Neither Sumbi nor Jeejee shows ads.

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

Sumbi ships an update weekly, and Jeejee every 4 days. Most recently, Sumbi was updated on October 29, 2026 and Jeejee 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.*