Comparison

Untangle vs Sumbi

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Untangle

This AI assistant helps organize your thoughts and break down overwhelming tasks into manageable steps. It simplifies planning by suggesting just five daily priorities, making it easier to start and complete your to-do list.

Highlights
  • AI-powered task organization
  • Breaks down complex tasks
  • Limits daily tasks to five
  • Conversational task management
  • Task decomposition into small steps
Features
Read full description

Know what you need to do but can't get started? Untangle is a planner that turns what's on your mind into tasks and breaks a big task into first steps you can do right now. Tangle, the AI assistant, does the sorting with you. You can start right away without signing up. Untangle is built by a small team for anyone who finds it hard to start, with or without an ADHD diagnosis. Break big tasks into small steps Pick a task you keep putting off and ask Tangle to break it down. Tangle asks when it is due and splits it into steps that fit your deadline. Check the steps, edit them, and save them as subtasks. Type it like a chat, save it as a plan Write "groceries tomorrow, hand in my assignment on Thursday, book movie tickets" in one message. Tangle turns it into separate tasks with dates, and you choose which ones to save. See all your tasks in one list Tasks with a time, tasks for later and finished tasks are in one list. Swipe a task to move it to another day or delete it. Plan your day on a calendar timeline Place tasks on the day's timeline and drag a block to change its time. Tasks without a set time wait in the Anytime row at the top. Start a focus timer and finish one thing at a time Start a 25-minute Pomodoro or a stopwatch with no time limit. Check off subtasks as you go. Your focus time is saved with each task. Get a reminder when it is time Set a reminder time for any task. Tap the notification to open that task directly. See today's tasks without opening the app The home screen widget shows today's remaining tasks, and you can check them off from the widget. Who it is for - People whose to-do list keeps growing but who struggle to start - People who put things off until the last minute - Adults with ADHD or ADHD traits who find it hard to set priorities - Students and working people whose study or work plans keep falling apart FAQ Q. I don't have an ADHD diagnosis. Can I still use it? A. Yes. Anyone who tends to put tasks off can use Untangle. Q. How is it different from other to-do list apps? A. Most to-do apps help you write tasks down. Untangle also helps you choose what to do first, break big tasks into steps and start with a timer. Q. Do I need an account? A. No. You can start without signing up or logging in. Q. Is it free? A. Yes. Untangle is free to use. Q. Where is my data stored? A. What you enter in the app, such as tasks and chats with Tangle, may be sent to and stored on our servers to provide app features. Data is encrypted in transit, and you can request deletion. See the privacy policy for details. Please note - AI answers may not always be accurate. You can report an inappropriate answer in the app. - Untangle is not a medical device and does not replace ADHD diagnosis or treatment. - Contact: Settings > Contact us in the app

About

Sumbi

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
Read full description

The longer you put your phone down, the deeper your life gets. 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

Screenshots

Untangle4 screens
Sumbi4 screens

Verdict

The call

The clearest difference is in-app purchases: Untangle at none against Sumbi's 3. On price, review sentiment, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Untangle ships an update every 6 days, Sumbi weekly. Both last shipped on October 31, 2026.

Scorecard1 real difference · 9 level
Untangle versus Sumbi: the parameters behind the verdict, then further details
ParameterUntangleSumbi
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 6 days — betterWeekly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhoneiPhone
Requires iOS17.016.4 — better
Further details — not scored
Size87 MB94 MB
Age rating4+4+
Developertaekyun kim나이스데이

Customer experience

Untangle

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Sumbi

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews18 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Untangle

No in-app purchases

3 purchases

Sumbi

One-time3
  • Shallow Sea Creature$0.99
  • Deep Sea Creature$1.99
  • Abyssal Creature$2.99

Questions

Is Untangle free?
Untangle is free to download, with no in-app purchases.
Is Sumbi free?
Sumbi is free to download, with in-app purchases available.
Do Untangle or Sumbi have ads?
Neither Untangle nor Sumbi shows ads.
Which is updated more often, Untangle or Sumbi?
Untangle ships an update every 6 days, and Sumbi weekly. Most recently, Untangle was updated on October 31, 2026 and Sumbi on October 31, 2026.

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