Comparison

Rect Clock vs OLED Clock

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

Head to head
About

Rect Clock

This app transforms your iPhone into a full-screen analog clock. Customize the clock face, index, and hands with various styles and colors. Enjoy a minimalist design with adjustable screen rotation and optional date display and auto-lock.

Highlights
  • Full-screen analog display
  • Customizable clock faces
  • Interchangeable index styles
  • Variety of hand designs
  • Adjustable hand movement
  • Screen rotation support
  • Configurable date and lock
Features
Read full description

An analog clock that fills the entire iPhone screen. Choose your favorite dial, indices, and hands to customize the clock to your style. A minimal design that perfectly complements the iPhone’s product design. ・ 12 dials: 6 included [Black / White / Silver / Wood / Leather / Luminous] + 6 available via in-app purchase [Space Black / Gold / Rose Gold / Skeleton / Stone / Power Saving] ・ 6 index styles × 6 colors: 2 included [Bar / Arabic Numerals (12-3-6-9)] + 4 available via in-app purchase [Roman Numerals / Roman Numerals (XII-III-VI-IX) / Arabic Numerals / Triangle] ・ 11 hand styles × 6 colors (12 colors for the second hand): 2 included [Bar / Dauphine] + 9 available via in-app purchase [Round / Pencil / Alpha / Lozenge / Baton / Leaf / Arrow / Spade / Breguet] ・ 3 hand movements [Sweep / Beat / Step] ・ Automatically rotates to portrait, landscape, or upside down to match your iPhone’s orientation ・ Date display [On / Off] ・ Auto-Lock [On / Off]

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!)

Screenshots

Rect Clock1 screens
OLED Clock4 screens

Verdict

The call

The clearest difference is in-app purchases: OLED Clock at none against Rect Clock's 5. OLED Clock also leads on ads (none vs shown) and review sentiment (79% vs 59%). Rect Clock's advantage is ratings volume (168 vs 15). On price, rating 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. Rect Clock sells 5 one-off in-app purchases. OLED Clock asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OLED Clock holds the better App Store score, 3.9 against 3.7. That said, the two scores are not equally well evidenced: Rect Clock has 168 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 59% of Rect Clock's written reviews are positive against 79% of OLED Clock's.

UpkeepUpdate frequency

Rect Clock ships an update monthly, OLED Clock every 4 weeks. The most recent releases landed on September 26, 2026 and September 20, 2026 respectively.

Scorecard7 real differences · 3 level
Rect Clock versus OLED Clock: the parameters behind the verdict, then further details
ParameterRect ClockOLED Clock
PriceFreeFree
Rating3.7 (168 ratings)3.9 (15 ratings) — better
Positive reviews58.7% of reviews78.6% of reviews — better
Number of ratings168 — better15
Update frequencyMonthlyEvery 4 weeks — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPodiPhone, iPad, iPod, Apple TV — better
Requires iOS15.612.0 — better
Further details — not scored
Size178 MB10 MB
Age rating4+4+
Developery-designChristian Moeller

Customer experience

Rect Clock

All ratings168 ratings
Positive67.3%
Neutral6.0%
Negative26.8%
Written reviews281 reviews
Positive58.7%
Neutral9.3%
Negative32.0%

OLED Clock

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

Bugs and requests

Rect Clock

Reported bugs

9 issues
  • Blank white screen on launch (iPhone XR, iPad Air 2)
  • App doesn't stay on when phone locks
  • App crashes or won't open after purchase
  • Settings screen appears on any touch
  • Unresponsive UI elements on iPad
Show 4 more
  • Battery percentage display frozen
  • Orientation doesn't adjust to device rotation
  • Ads still appear after paid purchase
  • App stopped working after updates

Requested features

13 requests
  • Alarm functionality
  • Lock screen integration
  • Live wallpaper capability
  • Apple Watch compatibility
  • Landscape/rotation support
Show 8 more
  • Always-on display when plugged in
  • Ticking sound effect
  • Adjustable brightness/dimming for night
  • Round clock face option
  • GMT/timezone hand option
  • Larger date/time display option
  • Screen saver mode
  • Additional color variations (red retro style)

OLED Clock

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Rect Clock

One-time5
  • Add All Faces$0.99
  • Add All Indexes$0.99
  • Add All Hands$0.99
Show 2 more
  • Remove Ads$0.99
  • Full Version$2.99
None

OLED Clock

No in-app purchases

Questions

Is Rect Clock free?
Rect Clock is free to download, with in-app purchases available.
Is OLED Clock free?
OLED Clock is free to download, with no in-app purchases.
Which has better reviews, Rect Clock or OLED Clock?
OLED Clock is rated higher. Rect Clock averages 3.7 out of 5 from 168 ratings, while OLED Clock averages 3.9 from 15 ratings.
Do Rect Clock or OLED Clock have ads?
Rect Clock shows ads; OLED Clock does not.
Which is updated more often, Rect Clock or OLED Clock?
Rect Clock ships an update monthly, and OLED Clock every 4 weeks. Most recently, Rect Clock was updated on September 26, 2026 and OLED Clock on September 20, 2026.

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