Comparison

OLED Clock vs Studio Clock GX2021

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

Studio Clock GX2021

Transform your space into a professional studio with a highly accurate LED clock inspired by 1970s designs. Perfect for live shows, streams, and podcasts, it offers precise timing and customizable visual elements.

Highlights
  • 1/1000 second accuracy
  • Leap second support
  • 1970s LED design
  • Customizable colors
  • Quarter/half/hourly pips
  • Greenwich Time Signal (GTS)
Features
Read full description

Need to host a time sensitive live show, stream or podcast? Turn your room into a professional studio with this clock that provides you the most accurate time, up to 1/1000 second. (+ leap second support) Design and animations are inspired by the LED clocks from the 70s, still used by radio & television studios, airports, and more. Want a more immersive experience? Enable the pips each quarter hour, half hour or every hour and turn up speakers to enjoy the Greenwich Time Signal (GTS) just like the one on the BBC radio stations. Customise the clock to match your channel or brand identity with exclusive colors, available in-app!

Screenshots

OLED Clock4 screens
Studio Clock GX20213 screens

Verdict

The call

The clearest difference is rating: Studio Clock GX2021 at 4.5 against OLED Clock's 3.9. Studio Clock GX2021 also leads on update cadence (every 3 days vs every 4 weeks) and ratings volume (79 vs 15). OLED Clock's advantage is in-app purchases (none vs 9) and iOS requirement (12.0 vs 14.1). On price, review sentiment, ads and device support 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. Studio Clock GX2021 sells 9 one-off in-app purchases. OLED Clock asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Studio Clock GX2021 holds the better App Store score, 4.5 against 3.9. That said, the two scores are not equally well evidenced: Studio Clock GX2021 has 79 ratings behind it against 15, so its average is the more settled of the two. Written reviews complicate that: 79% of OLED Clock's written reviews are positive against 73% of Studio Clock GX2021'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, Studio Clock GX2021 every 3 days. The most recent releases landed on October 7, 2026 and October 13, 2026 respectively.

Scorecard6 real differences · 4 level
OLED Clock versus Studio Clock GX2021: the parameters behind the verdict, then further details
ParameterOLED ClockStudio Clock GX2021
PriceFreeFree
Rating3.9 (15 ratings)4.5 (79 ratings) — better
Positive reviews78.6% of reviews — better73.0% of reviews
Number of ratings1579 — better
Update frequencyEvery 4 weeksEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple TViPhone, iPad, iPod, Mac
Requires iOS12.0 — better14.1
Further details — not scored
Size10 MB3 MB
Age rating4+4+
DeveloperChristian MoellerTrevor Kamhunga

Customer experience

OLED Clock

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

Studio Clock GX2021

All ratings79 ratings
Positive87.3%
Neutral2.5%
Negative10.1%
Written reviews37 reviews
Positive73.0%
Neutral5.4%
Negative21.6%

In-app purchases

None

OLED Clock

No in-app purchases

9 purchases

Studio Clock GX2021

One-time9
  • Tangerine$0.99
  • Aqua$0.99
  • Plum$0.99
Show 6 more
  • Banana$0.99
  • Strawberry$0.99
  • Bubblegum$0.99
  • Flora$0.99
  • Maraschino$0.99
  • Color Bundle$2.99

Questions

Is OLED Clock free?
OLED Clock is free to download, with no in-app purchases.
Is Studio Clock GX2021 free?
Studio Clock GX2021 is free to download, with in-app purchases available.
Which has better reviews, OLED Clock or Studio Clock GX2021?
Studio Clock GX2021 is rated higher. OLED Clock averages 3.9 out of 5 from 15 ratings, while Studio Clock GX2021 averages 4.5 from 79 ratings.
Do OLED Clock or Studio Clock GX2021 have ads?
Neither OLED Clock nor Studio Clock GX2021 shows ads.
Which is updated more often, OLED Clock or Studio Clock GX2021?
OLED Clock ships an update every 4 weeks, and Studio Clock GX2021 every 3 days. Most recently, OLED Clock was updated on October 7, 2026 and Studio Clock GX2021 on October 13, 2026.

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