Big Red Clock vs OLED Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Big Red Clock
This app provides a large, easily readable digital clock with both 12-hour and 24-hour formats. It also includes a countdown timer and a stopwatch function for various timekeeping needs.
- Large digital clock display
- 12-hour and 24-hour formats
- Countdown timer
- Stopwatch functionality
- Red color theme
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The perfect BIG NUMBER digital clock ...and red is just the beginning! Features: 12 hour or 24 hour Clock / Timer / Stopwatch Premium features (with subscription): Time Zone Assistant / Learn 24 Hour Time / Learn 12 Hour Time / Multi-Timer / Multi-Stopwatch Delightful set of colors and fonts to choose from Big Red Clock uses the standard Apple Terms of Use End User License Agreement (EULA): http://www.apple.com/legal/itunes/appstore/dev/stdeula
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!)
Screenshots
Verdict
The clearest difference is rating: Big Red Clock at 4.5 against OLED Clock's 3.9. Big Red Clock also leads on ratings volume (101 vs 15). OLED Clock's advantage is in-app purchases (none vs 2) and update cadence (every 4 weeks vs every 2 months). On price, review sentiment, ads and monetization model 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. Big Red Clock sells 2 in-app purchases, starting at $0.99 per month. OLED Clock asks for nothing beyond the download.
Big Red Clock holds the better App Store score, 4.5 against 3.9. That said, the two scores are not equally well evidenced: Big Red Clock has 101 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 83% of Big Red Clock's written reviews are positive against 79% of OLED Clock's.
Big Red Clock ships an update every 2 months, OLED Clock every 4 weeks. The most recent releases landed on September 23, 2026 and September 20, 2026 respectively.
| Parameter | Big Red Clock | OLED Clock |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (101 ratings) — better | 3.9 (15 ratings) |
| Positive reviews | 82.8% of reviews — better | 78.6% of reviews |
| Number of ratings | 101 — better | 15 |
| Update frequency | Every 2 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, Mac, Apple TV | iPhone, iPad, iPod, Apple TV |
| Requires iOS | 18.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Single Sail Software, LLC | Christian Moeller |
Customer experience
Big Red Clock
OLED Clock
In-app purchases
Big Red Clock
- Monthly1 Month trial$0.991 Month
- Yearly1 Month trial$5.991 Year
OLED Clock
No in-app purchases
Questions
Is Big Red Clock free?
Is OLED Clock free?
Which has better reviews, Big Red Clock or OLED Clock?
Do Big Red Clock or OLED Clock have ads?
Which is updated more often, Big Red Clock or OLED Clock?
Other comparisons
