OLED Clock vs Simple Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- OLED burn-in prevention
- Animated clock movement
- Color cycling
- Digital and analog views
- Customizable fonts and size
- Adjustable animation speed
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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!)
Simple Clock
This utility app provides a customizable digital clock with adjustable colors and sizes, and an analog dial option for iPad users. It also offers accurate time synchronization via NTP servers.
- Customizable digital clock colors
- Adjustable clock sizes
- Toggle seconds display
- Analog dial for iPad
- NTP time synchronization
- Customizable NTP servers
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Simple Clock is an app designed for situations where timing is critical, such as live streams and event management. [Features] ・Digital Clock - Customize the clock’s color to your liking - Choose from three clock sizes (Small / Medium / Large) - Toggle the seconds display on or off ・Analog Dial (iPad Only) - Freely customize the dial and hand colors - Supports overlay display of digital time ・NTP Time Synchronization - Retrieve accurate time via the internet - Customizable NTP servers
Screenshots
Verdict
The clearest difference is rating: OLED Clock at 3.9 against Simple Clock's 1.0. OLED Clock also leads on ratings volume (15 vs 1) and iOS requirement (12.0 vs 14.0). On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
OLED Clock holds the better App Store score, 3.9 against 1.0. That said, the two scores are not equally well evidenced: OLED Clock has 15 ratings behind it against 1, so its average is the more settled of the two.
OLED Clock ships an update every 4 weeks, Simple Clock every 6 weeks. The most recent releases landed on October 7, 2026 and September 24, 2026 respectively.
| Parameter | OLED Clock | Simple Clock |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (15 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 78.6% of reviews | — |
| Number of ratings | 15 — better | 1 |
| Update frequency | Every 4 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Apple TV — better | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 10 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Christian Moeller | Imagination Studio LLC. |
Customer experience
OLED Clock
Simple Clock
In-app purchases
OLED Clock
No in-app purchases
Simple Clock
No in-app purchases
Questions
Is OLED Clock free?
Is Simple Clock free?
Which has better reviews, OLED Clock or Simple Clock?
Do OLED Clock or Simple Clock have ads?
Which is updated more often, OLED Clock or Simple Clock?
Other comparisons
