Comparison

KLOCK vs REMAIN

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

Head to head
About

KLOCK

Features
Read full description

When you need to focus, choose KLOCK. Keep reaching for your phone when you’re supposed to be studying? It’s time to really lock in. Key Features AI Focus Care If you get distracted while studying, AI catches it instantly. It smartly checks whether you’re actually focused, so your study flow doesn’t get interrupted. Timelapse That Records Your Effort Your study sessions are automatically recorded and turned into clean, shareable timelapse videos. Seeing how long you truly stayed focused naturally boosts your motivation. 25 Minutes On β†’ Real Breaks Focus for 25 minutes and break time is automatically earned. Go hard when you study, fully relax when you rest. Clean Design + Dark Mode A sleek, distraction-free interface. Just having it open makes you feel more focused. Start today with Clark and turn your study time into real, intentional time. When you track it, it changes. Focus becomes a habit.

About

REMAIN

Features
Read full description

What have you been saving for β€œlater”? REMAIN shows how much of today, this week, this month and this year is still ahead. Add a countdown for a trip, a deadline or a day that matters to you, and keep it on your Home Screen. Start for free Create one countdown and use the basic Home Screen widgets. No purchase or trial is needed to get started. Make a little room in your day Not sure where to begin? Pick a small action that fits how you feel. In the evening, check off your routine and bring the day to a close. See your time differently Explore the time ahead through visual scales and calendars. You don't need a detailed plan to get a clearer sense of your day. Want more? Try REMAIN Pro Add more countdowns and unlock Lock Screen and combined widgets, extra themes, dot-grid views and past reports. Choose a weekly or annual subscription, or lifetime access. Pro is optional. A 7-day free trial of the annual plan is available to eligible users. Subscriptions renew automatically unless canceled. After a trial, the selected plan is charged. Check the purchase screen for local pricing and trial eligibility. Manage subscriptions in your Apple account settings. Privacy Policy: https://remain-timeleft.vercel.app/en/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

KLOCK4 screens
REMAIN4 screens

Verdict

The call

The clearest difference is in-app purchases: KLOCK at none against REMAIN's 3. KLOCK also leads on update cadence (daily vs monthly) and iOS requirement (15.6 vs 26.1). On price, ads and device support there is nothing between them.

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. REMAIN sells 3 in-app purchases, starting at $2.49 per 7 days. KLOCK asks for nothing beyond the download.

UpkeepUpdate frequency

KLOCK ships an update daily, REMAIN monthly. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

Scorecard3 real differences Β· 3 level
KLOCK versus REMAIN: the parameters behind the verdict, then further details
ParameterKLOCKREMAIN
PriceFreeFree
Update frequencyDaily β€” betterMonthly
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.6 β€” better26.1
Further details β€” not scored
Size102 MB29 MB
Age rating4+4+
DeveloperChanwoo SeongNahyun Park

In-app purchases

None

KLOCK

No in-app purchases

3 purchases

REMAIN

Subscriptions2
  • REMAIN Pro Weekly$2.497 Days
  • REMAIN Pro Yearly7 Days trial$29.991 Year
One-time1
  • REMAIN Pro Lifetime$49.99

Questions

Is KLOCK free?
KLOCK is free to download, with no in-app purchases.
Is REMAIN free?
REMAIN is free to download, with in-app purchases available.
Do KLOCK or REMAIN have ads?
Neither KLOCK nor REMAIN shows ads.
Which is updated more often, KLOCK or REMAIN?
KLOCK ships an update daily, and REMAIN monthly. Most recently, KLOCK was updated on October 1, 2026 and REMAIN on October 12, 2026.

Other comparisons