Comparison

Lucid vs Sync

Price, ratings, monetisation and update history for both apps, side by side โ€” 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. โ–  Catch the 3 seconds it lives Tap the home screen widget and start typing. Don't pick a type or a place โ€” just get it down. โ–  Organize in 5 minutes a day Swipe through your thoughts and answer one thing: "Where does this go?" No jargon โ€” Projects, Areas, Resources, Archive. โ–  Today, only what matters Open the app and today's tasks come first. Each one done is a small win. โ–  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

Sync

Features
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Few days go exactly as planned. Sync lines up your plan and what you actually did on one timeline, and shows where they part. After a week, the hours that always slip become obvious. Plan your day in the morning, record what you did in the evening, and the two tracks line up side by side. Time that went as planned and time that drifted show in color. โ–  Two tracks Plan and actual share one time axis. Drag over the hours, pick an activity, done. โ–  One tap to confirm When a plan ends, Sync asks "Did it go as planned?" โ€” Record as planned ยท Adjust and record ยท Skip. The buttons are right on the Lock Screen and in widgets. โ–  Repeats and habits Turn a plan into a repeat or a habit as you save it. When you edit a repeating plan, choose "Save for this day only" or "Save for all future days." Plans that run past midnight save in one go. โ–  Timer Start a timer and the actual track grows in real time. Stop it from the Lock Screen or the Dynamic Island. โ–  Goals and to-dos Set weekly, monthly, or yearly time goals per activity and they fill in from your actuals. To-dos can have both a scheduled day and a deadline. โ–  Apple Health, Calendar, Reminders Connect Apple Health (HealthKit) and your workouts and sleep โ€” from Apple Watch or any app that writes to Health โ€” flow into the actual track automatically. Read-only: Sync never writes to Health. Calendar events show beneath the plan track; choose which calendars to show, and the activity is picked for you when you import an event. To-dos stay in sync with a Reminders list. โ–  Close the day Close your day before bed to see your Sync and time per activity, and leave a one-line note. โ–  iPhone and iPad On iPad, Sync uses views made for the larger screen. Turn on iCloud sync to keep records in step on an iPhone and iPad signed in to the same Apple Account. Your records are stored on your device. With iCloud sync on, they move only through your own iCloud. No sign-up, no server of ours.

Screenshots

Lucid4 screens
Sync4 screens

Verdict

The call

The clearest difference is price: Lucid at Free against Sync's $4.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Lucid is free to download; Sync costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Lucid ships an update every 3 days, Sync every 5 days. The most recent releases landed on September 17, 2026 and October 1, 2026 respectively.

Scorecard1 real difference ยท 5 level
Lucid versus Sync: the parameters behind the verdict, then further details
ParameterLucidSync
PriceFree โ€” better$4.99
Update frequencyEvery 3 days โ€” betterEvery 5 days
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone, iPad โ€” better
Requires iOS17.0 โ€” better18.0
Further details โ€” not scored
Size2 MB10 MB
Age rating4+4+
DeveloperGoo wong KwonJaewon Seo

In-app purchases

None

Lucid

No in-app purchases

None

Sync

No in-app purchases

Questions

Is Lucid free?
Lucid is free to download, with no in-app purchases.
Is Sync free?
Sync costs $4.99, with no in-app purchases.
Do Lucid or Sync have ads?
Neither Lucid nor Sync shows ads.
Which is updated more often, Lucid or Sync?
Lucid ships an update every 3 days, and Sync every 5 days. Most recently, Lucid was updated on September 17, 2026 and Sync on October 1, 2026.

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