Comparison

Lucid vs Onulchi

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

Head to head
About

Lucid

Features
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Ever had a great idea, written it down, and never found it again? Notes apps just pile up. All-in-one tools get overwhelming. Lucid sits in between. β–  Catch the 3 seconds it lives Tap the home screen widget and start typing. Don't pick a type or a place β€” just get it down. β–  Organize in 5 minutes a day Swipe through your thoughts and answer one thing: "Where does this go?" No jargon β€” Projects, Areas, Resources, Archive. β–  Today, only what matters Open the app and today's tasks come first. Each one done is a small win. β–  Your second brain, in your hand No account, no login. Every thought stays safe on your iPhone. Stop losing your best ideas. Let Lucid remember them for you.

About

Onulchi

Features
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Onulchi turns the routine you design into a daily game. "Onulchi" means "today's share" in Korean: you don't have to be perfect, you just have to do today's share. YOUR ROUTINE, YOUR POINTS Pick from suggested tasks across 9 categories, from waking up and eating well to workouts, focus, and time with people who matter. Or create your own. You decide how many points each task is worth. REACH 100 TO CLEAR THE DAY Check off what you did and watch the gauge fill. Reach 100 points and the day is cleared. Add more than 100 points' worth of tasks, and you can clear the day without doing everything. A WEEKLY REWARD YOU CHOOSE Earn 600 points in a week and treat yourself to the reward you picked. It's set at 600, not 700, so one slow day won't cost you the week. LEVELS AND WISHES Write one wish for each level. Clear 30 days in a row to level up. Miss a day and the count starts over, but your level stays. BUILT FOR HARD DAYS - 2Γ— bonus: tasks you get done on weekends or hard days earn double. - Rest days keep your streak safe. - Must-do tags highlight the tasks that matter most. SEE YOUR WEEK Switch between Today and Week views, fill in days you forgot, and check your stats by week or month. SIMPLE AND PRIVATE - Free, with no ads and no in-app purchases. - Sign in with a one-time email code. No password to remember. - No tracking or analytics. You can delete your account and data in Settings at any time. Questions or ideas: viva.shinjadu@gmail.com

Screenshots

Lucid4 screens
Onulchi4 screens

Verdict

The call

Lucid and Onulchi are too close to call on the numbers: across 6 compared parameters β€” price, update cadence, ads and in-app purchases among them β€” neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Lucid ships an update every 3 days, Onulchi every 2 days. Both last shipped on October 31, 2026.

ScorecardNo meaningful differences
Lucid versus Onulchi: the parameters behind the verdict, then further details
ParameterLucidOnulchi
PriceFreeFree
Update frequencyEvery 3 daysEvery 2 days β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone
Requires iOS17.016.4 β€” better
Further details β€” not scored
Size2 MB52 MB
Age rating4+4+
DeveloperGoo wong KwonCHOHEE KIM

In-app purchases

None

Lucid

No in-app purchases

None

Onulchi

No in-app purchases

Questions

Is Lucid free?
Lucid is free to download, with no in-app purchases.
Is Onulchi free?
Onulchi is free to download, with no in-app purchases.
Do Lucid or Onulchi have ads?
Neither Lucid nor Onulchi shows ads.
Which is updated more often, Lucid or Onulchi?
Lucid ships an update every 3 days, and Onulchi every 2 days. Most recently, Lucid was updated on October 31, 2026 and Onulchi on October 31, 2026.

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