Comparison

Kurun vs ONE

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

Head to head
About

Kurun

Visualize your entire day as a single pie chart to understand where your time is spent. Easily identify time sinks, imbalances, and gaps in your schedule. Organize tasks and log activities directly within the app.

Highlights
  • Full 24-hour pie chart visualization
  • Color-coded activity tracking
  • Spot untracked time gaps
  • Customizable activity categories
  • Built-in to-do list
  • Stopwatch and timer for direct logging
Features
Read full description

Kurun turns your entire day into a single pie chart — so you can see exactly where your time goes, without scrolling through endless lists. Why a pie chart? Most calendar and to-do apps stack your schedule top to bottom. But a vertical list can't show you the full picture. Kurun fits all 24 hours into one circle. The moment you look at it, you just get it: - That "quick" social media check? It's a surprisingly big slice. - Gaps in your day show up as empty space — no hiding from lost time. - More time resting than working? The imbalance is obvious at a glance. Before you analyze the numbers, you feel the shape of your day. That's the power of the circle. Does this sound familiar? - You were busy all day, but nothing feels done - You can't quite remember how you spent the last 24 hours - You have no idea how much time you lose to scrolling or breaks - You want better balance between work, study, and sleep - You know something's off, but don't know where to start What you can do with Kurun - Visualize your full 24 hours in one pie chart - Color-code activities and tasks for instant clarity - Spot untracked gaps in your day at a glance - Create custom categories — study, work, sleep, anything - Review each day and catch time imbalances early - Organize your tasks with the built-in to-do list - Use the built-in stopwatch and timer to log time directly to your timeline Perfect for - Anyone building better time management habits - Students tracking study sessions and focus time - Professionals looking to improve work-life balance - Fans of time tracking, life logging, or habit journaling - Anyone who prefers visual records over written notes Log it simply. See it clearly. Feel how you spend your time — with Kurun. Some features (To-Do, Pomodoro Timer, and more) are available with a Pro plan (in-app purchase). Terms of Service:https://scented-cross-231.notion.site/Kurun-Terms-of-Use-32b71e35e68d80249cc0c7525119a60e?source=copy_link Privacy Policy:https://scented-cross-231.notion.site/Kurun-Privacy-Policy-32b71e35e68d8071a52dd5e2f4886d64?source=copy_link

About

ONE

Read full description

Not another to-do list. ONE Focus is a single-task focus timer for a deeper life. You commit to one thing at a time—nothing else on screen, nothing competing for your attention. WHY ONE FOCUS? • One thing only — no lists, no tabs, no clutter • Start in one line — type a title, press return, begin • Gentle accountability — a progress check-in every 45 minutes • Five-step progress — 0, 25, 50, 75, or 100%, with an optional note • Quiet by design — no streak anxiety, no gamification, no noise • Night quiet hours — no notifications between 22:00 and 09:00 • Minimal history — see what you've finished, nothing more HOW IT WORKS 1. Enter one thing and start 2. Stay with it — elapsed time keeps you honest 3. Respond to check-ins when prompted (or update progress anytime) 4. Mark complete when you're done 5. Move on to the next moment DESIGNED TO FEEL CALM Editorial Noir typography, generous whitespace, and champagne-gold accents. Dark-first. No feature bloat. No account required. Everything stays on your device. Built for focus, study, deep work, and everyday presence—reading to your child, cooking a meal, taking a walk, creating something meaningful, or simply being here. Download. Pick one thing. Live it fully.

Screenshots

Kurun4 screens
ONE3 screens

Verdict

The call

The clearest difference is in-app purchases: ONE at none against Kurun's 5. Kurun's advantage is iOS requirement (15.1 vs 17.0). On price, update cadence, ads and device support 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. Kurun sells 5 in-app purchases, starting at $4.99 per month. ONE asks for nothing beyond the download.

UpkeepUpdate frequency

Kurun ships an update fortnightly, ONE every 2 weeks. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 6 level
Kurun versus ONE: the parameters behind the verdict, then further details
ParameterKurunONE
PriceFreeFree
Positive reviews80.0% of reviews—
Update frequencyFortnightly — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPod — betteriPhone
Requires iOS15.1 — better17.0
Further details — not scored
Size56 MB2 MB
Age rating4+4+
DeveloperKYOSUKE WATANABE骋飞 武

In-app purchases

5 purchases

Kurun

Subscriptions3
  • Kurun Pro Monthly$4.991 Month
  • Pro$19.991 Year
  • Kurun Pro Yearly3 Days trial$34.991 Year
One-time2
  • Kurun Pro Lifetime$39.99
  • Kurun Pro Lifetime$79.99
None

ONE

No in-app purchases

Questions

Is Kurun free?
Kurun is free to download, with in-app purchases available.
Is ONE free?
ONE is free to download, with no in-app purchases.
Do Kurun or ONE have ads?
Neither Kurun nor ONE shows ads.
Which is updated more often, Kurun or ONE?
Kurun ships an update fortnightly, and ONE every 2 weeks. Most recently, Kurun was updated on October 30, 2026 and ONE on October 28, 2026.

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