Comparison

OLED Clock vs SClock

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

Head to head
About

OLED Clock

This app displays a dynamic clock designed to prevent OLED screen burn-in by constantly moving and changing colors. It offers customizable digital and analog views with various fonts, sizes, and animation speeds.

Highlights
  • OLED burn-in prevention
  • Animated clock movement
  • Color cycling
  • Digital and analog views
  • Customizable fonts and size
  • Adjustable animation speed
Features
Read full description

No burn-In! This clock is perfectly suited for the OLED display in iPhone X, because the clock won't stand still on the screen but moves around constantly using any available pixel of the screen over time. Also it smoothly changes color over the complete color spectrum, so that every sub pixel (red, green, blue) will be used evenly. This prevents the so called "burn-in effect" any OLED display shows, if certain pixels are switched on for a very long time. The clock not just works on iPhone X but on all iOS devices like iPhone, iPod Touch and iPad (iOS 9.3 and above). But there's more: - NEW: digital and analog representation of the clock. You choose! - choose between a huge number of nice looking fonts to display the actual time - adjust clocks size just by using the pinch gesture on main screen - use automatic color changes "color cycling" (recommended on iPhone x, can be switched off in settings) - adjust the clocks brightness by using scroll up and down gesture on the main screen - tap on the main screen to show tab bar at the bottom of the screen, here you will be able to switch between analog and digital view, call settings, help and about page - on settings page you can change font, color and animation speed as well as switch on/off seconds, blinking separators, 24h display, autosize and color cycling - all adjustments are permanent! OLED clock remembers them on the next time you use it! - use OLED clock in portrait or landscape mode. On digital mode, OLED clock remembers your preferred font size depending on device orientation - help page provides necessary information about usage - fully localized in english, german, hebrew, french and japanese (new!)

About

SClock

This app offers a customizable clock with adjustable display sizes and color options. It features dual timers with customizable sounds and visual cues, perfect for time management tasks like Pomodoro.

Highlights
  • Adjustable display size
  • Color selectable clock face
  • Dual timer functionality
  • Customizable countdown sounds
  • Color-coded time display
  • Simple, easy-to-read design
Features
Read full description

・ 24H / 12H calendar Simple clock function with color selectable ・The sound before the start, the countdown sound, the color display can be changed according to the remaining time, and the two timers can be switched, making it ideal for pomodoro timers, etc.The sound before the start, the countdown sound, the color display can be changed according to the remaining time, and the two timers can be switched, making it ideal for pomodoro timers, etc. ・By switching between large format and middle size display, it is easy to use at hand and has excellent visibility from a distance in a wide place. ・Simple and easy-to-read design. You can use it in any situation such as studying, meetings, presentations, sports, fitness, cooking, etc.

Screenshots

OLED Clock4 screens
SClock4 screens

Verdict

The call

The clearest difference is in-app purchases: OLED Clock at none against SClock's 1. OLED Clock also leads on ads (none vs shown) and review sentiment (79% vs 50%). SClock's advantage is rating (4.3 vs 3.9). On price, ratings volume and update cadence 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. SClock sells 1 in-app purchase, starting at $0.99 per month. OLED Clock asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SClock holds the better App Store score, 4.3 against 3.9. Both are backed by a comparable volume of ratings — 15 and 24 respectively. Written reviews complicate that: 79% of OLED Clock's written reviews are positive against 50% of SClock's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

OLED Clock ships an update every 4 weeks, SClock fortnightly. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

Scorecard7 real differences · 3 level
OLED Clock versus SClock: the parameters behind the verdict, then further details
ParameterOLED ClockSClock
PriceFreeFree
Rating3.9 (15 ratings)4.3 (24 ratings) — better
Positive reviews78.6% of reviews — better50.0% of reviews
Number of ratings1524 — better
Update frequencyEvery 4 weeksFortnightly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple TV — betteriPhone, iPad
Requires iOS12.0 — better16.1
Further details — not scored
Size10 MB30 MB
Age rating4+4+
DeveloperChristian MoellerHajime Suzuki

Customer experience

OLED Clock

All ratings15 ratings
Positive66.7%
Neutral13.3%
Negative20.0%
Written reviews28 reviews
Positive78.6%
Neutral7.1%
Negative14.3%

SClock

All ratings24 ratings
Positive83.3%
Neutral4.2%
Negative12.5%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

OLED Clock

No in-app purchases

1 purchases

SClock

Subscriptions1
  • premium$0.991 Month

Questions

Is OLED Clock free?
OLED Clock is free to download, with no in-app purchases.
Is SClock free?
SClock is free to download, with in-app purchases available.
Which has better reviews, OLED Clock or SClock?
SClock is rated higher. OLED Clock averages 3.9 out of 5 from 15 ratings, while SClock averages 4.3 from 24 ratings.
Do OLED Clock or SClock have ads?
SClock shows ads; OLED Clock does not.
Which is updated more often, OLED Clock or SClock?
OLED Clock ships an update every 4 weeks, and SClock fortnightly. Most recently, OLED Clock was updated on October 7, 2026 and SClock on October 6, 2026.

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