Sumbi - Study Focus Timer
Sumbi - Study Focus Timer is made and published by 나이스데이. AppBrain is an independent app data site and isn't affiliated with 나이스데이. The app name, icon, screenshots and description belong to 나이스데이 and are shown as published on the App Store.
AppBrain's verdict
New- Rating on App Store
- 5.00
- 1 ratings
- Last updated
- October 28, 2026
- Size
- 94.0 MB
Sumbi - Study Focus Timer came out 39 days ago. It doesn't have enough ratings yet to judge what users think. Its best ranking is #92 in Top Free, Productivity in South Korea.
User feedback
Ratings and reviews on the App StoreComments on Sumbi - Study Focus Timer for iOS
We don't have enough comments to show example comments. Please check back later.
Store listing
By 나이스데이, from the App Store
Description by 나이스데이 Written by the developer, not by AppBrain. Click to read.
Start the timer, set your phone down, and sea creatures come to your ocean.
From exam prep to digital detox, dive with Sumbi.
Sumbi is a study focus timer and digital detox app named after the "sumbisori," the whistling breath of Jeju haenyeo, Korea's legendary free-diving women. Start a dive when you want time away from your phone. While your phone rests, your ocean deepens, and sea creatures come to live in it.
Who dives with Sumbi
- Students who need a study timer for exams and deep focus
- Anyone fighting phone addiction or doomscrolling
- People who want to cut screen time and rebuild concentration
- ADHD brains that need a gentle, visual reason to stay off the phone
- Anyone who just wants to watch a calm ocean and breathe
What makes Sumbi different
1. One dive = one focus session. Keep your phone down while the timer runs, and the dive succeeds. If you fail, nobody scolds you.
2. Your focus time becomes an ocean. Successful dives bring creatures from shallow water, deep water, even the abyss.
3. Collect and raise your sea creatures. The more you dive, the wider and deeper your ocean grows.
4. Gift creatures to your dive buddies. Focus is deeper together.
5. No ads, no noise. Sumbi never drags you back with notifications. Coming back is your choice.
Study timer, pomodoro, or deep work
Pick any length with the dial: a short pomodoro-style session or hours of exam prep. Every dive adds to your daily focus record.
When haenyeo divers surface, they release a long whistling breath: "hooo-ee." Your day deserves a breath that deep. Have a good dive. Hoo-ee!
Contact: sumbi@niceday.io
Safety and technology
Found in the app by AppBrain- Price
- Free
- App size
- 94.0 MB
- Content rating
- Everyone
Technologies used by Sumbi - Study Focus Timer
Releases
Updates seen on the App Store- Version
- 1.2.1
- Launched
- September 2026
No changelog data
Alternatives
Similar apps and more from 나이스데이Alternatives to Sumbi - Study Focus Timer
Also available on Google Play
Rankings
App Store top charts- Highest rank
- #92
- Chart
- Top Free
- Productivity
- Country
- South Korea
App Store Rankings for Sumbi - Study Focus Timer
Top rankings
| Rank | Country | Category | List |
|---|---|---|---|
| 92 | South Korea | Productivity | Top Free |
Ranking history in South Korea
About the app and developer
About Sumbi - Study Focus Timer
Sumbi - Study Focus Timer is a productivity app developed by 나이스데이.
User Ratings
Sumbi - Study Focus Timer is rated 5.00 out of 5 stars. The rating is based on one rating ratings.
App Information
Sumbi - Study Focus Timer is freely available from the App Store. The app size is 94.00 MB. The latest version available is 1.2.1. The last update was on October 28, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since September 2026.
Developer information for 나이스데이
Address:
Frequently asked questions about Sumbi - Study Focus Timer
Is Sumbi - Study Focus Timer free?
Yes. Sumbi - Study Focus Timer is free on the App Store.
Is Sumbi - Study Focus Timer still available?
Yes. Sumbi - Study Focus Timer is on the App Store, and the last update we saw was on October 28, 2026.
How large is Sumbi - Study Focus Timer?
Sumbi - Study Focus Timer is 94.00 MB.
Is Sumbi - Study Focus Timer suitable for children?
App Store rates the content of Sumbi - Study Focus Timer as suitable for everyone.
How do people rate Sumbi - Study Focus Timer?
Sumbi - Study Focus Timer has one rating of 5.00 stars on the App Store.
Who made Sumbi - Study Focus Timer?
Sumbi - Study Focus Timer was developed by 나이스데이. It is listed in the productivity category on the App Store.
What are the best alternatives to Sumbi - Study Focus Timer?
People looking at Sumbi - Study Focus Timer also look at these productivity apps: 루게더, Proof, Jeolmi: Cute Study Timer, FocusCat: Focus Timer, DeskTabby.