Comparison

Doongsil vs Focus One

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

Head to head

Doongsil

Focus, goals and daily notes

A gentle timer for calm focus

Free

📊 Productivity

No ratingsView app →

About

Doongsil

Features

Read full description

Make time for your goals with a little adventure. Our adorable friends dream of traveling to space in hot air balloons. What is your goal? Join them on a journey of your own. As you spend time focusing, your balloon rises higher toward space. - Customize your balloon, basket and character to make your goals your own. - Stay focused with a timer and watch your balloon rise. - Record your daily activities with notes and photos, and look back on your progress.

About

Focus One

Features

Read full description

Focus One is a simple focus timer for people who want to start one task, stay with it, and reduce mental clutter. Choose what you will do now, set a timer, and begin. The app keeps the screen quiet so you can return to the one thing in front of you. The settings screen lets you choose the app language, so the app can be localized to the language you select. Useful for study, work, Pomodoro-style sessions, ADHD-friendly routines, and building a visible focus record over time.

Screenshots

Doongsil4 screens

Focus One4 screens

Verdict

The call

The clearest difference is in-app purchases: Focus One at none against Doongsil's 1. Focus One also leads on update cadence (every 2 weeks vs every 11 months). Doongsil's advantage is iOS requirement (15.0 vs 18.0). On price, 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. Doongsil sells 1 one-off in-app purchase. Focus One asks for nothing beyond the download.

UpkeepUpdate frequency

Doongsil ships an update every 11 months, Focus One every 2 weeks. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 3 level

Doongsil versus Focus One: the parameters behind the verdict, then further details
Parameter	Doongsil	Focus One
Price	Free	Free
Update frequency	Every 11 months	Every 2 weeks — better
Ads	Yes	Yes
In-app purchases	Yes	No — better
Devices	iPhone, iPod — better	iPhone
Requires iOS	15.0 — better	18.0
Further details — not scored
Size	42 MB	6 MB
Age rating	4+	4+
Developer	Minseok Song	BYNET

In-app purchases

1 purchases

Doongsil

One-time1

Doongsil Pro$3.99

None

Focus One

No in-app purchases

Questions

Is Doongsil free?

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

Is Focus One free?

Focus One is free to download, with no in-app purchases.

Do Doongsil or Focus One have ads?

Both Doongsil and Focus One show ads.

Which is updated more often, Doongsil or Focus One?

Doongsil ships an update every 11 months, and Focus One every 2 weeks. Most recently, Doongsil was updated on October 17, 2026 and Focus One on October 15, 2026.