Comparison

OLED Clock vs OLEDify Pure Black Wallpapers

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

OLEDify Pure Black Wallpapers

Transform your dark wallpapers into pure black images to significantly reduce battery consumption on OLED and AMOLED screens. This app helps you achieve deeper blacks and potentially extend your device's battery life by turning pixels completely off.

Highlights
  • Convert dark wallpapers to pure black
  • Reduce battery usage on OLED/AMOLED screens
  • Adjust color threshold and RGB sliders
  • Crop and resize wallpapers
  • Post wallpapers to Reddit
Features
Read full description

Wallpapers edited via OLEDify help reduce battery usage as it takes advantage of the OLED screens on the new phones. OLEDify converts regular dark wallpapers into Pure Black wallpapers (#000000 - pixel is off). Since the pure black pixels are off, it helps reduce battery use on the newer phones with OLED and AMOLED screens. You get slightly better battery life, and brilliantly inky blacks which looks super crisp! Wallpapers which contain grey or other dark colors still keep the pixel on which utilizes the battery more as compared to a wallpaper which contains pure black pixels. You can read supporting research of battery usage on OLED screens here: https://www.greenbot.com/article/2834583/how-much-power-does-a-black-interface-really-save-on-amoled-displays.html As per this, pure black wallpapers can reduce 15-20% battery usage. How to use the app: 1. Open a dark wallpaper by tapping + 2. Set the threshold (T) slider to something higher than 0. Start off with 5 for example. 3. Long press on the image to enable the eyedropper/color picker and pick the dark color. 4. OLEDify will turn all colors darker than the picked color into pure black #000000 5. The Pure Black % at the top tells you how many of the pixels are off. You can tap on it to toggle and see the black pixels. 6. Play around with the Threshold and R, G, B sliders until you achieve a suitable look. 7. Tap “Next” to Save the image. 8. The “Crop & Resize” tool can be used to resize & fit wallpapers for your screen. This is useful when you have an image which doesn't perfectly fit your screen as it helps you create a new image of the suitable size. 9. The "Post to Reddit" option posts the wallpaper directly to the /r/AmoledBackgrounds subreddit. All features are 100% free and no ads in the app. There is a tip jar option but it's not necessary, only if you really really find the app useful and have some spare change, you can buy me a beer with a small tip! Help spread the word by leaving a review in the app store and tell your friends about it! If you have any feedback, reach out to: pran@pranapps.com

Screenshots

OLED Clock4 screens
OLEDify Pure Black Wallpapers4 screens

Verdict

The call

The clearest difference is rating: OLEDify Pure Black Wallpapers at 4.7 against OLED Clock's 3.9. OLEDify Pure Black Wallpapers also leads on ratings volume (342 vs 15) and review sentiment (95% vs 79%). OLED Clock's advantage is in-app purchases (none vs 5) and update cadence (every 4 weeks vs every 2 months). On price, 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. OLEDify Pure Black Wallpapers sells 5 one-off in-app purchases. OLED Clock asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OLEDify Pure Black Wallpapers holds the better App Store score, 4.7 against 3.9. That said, the two scores are not equally well evidenced: OLEDify Pure Black Wallpapers has 342 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 79% of OLED Clock's written reviews are positive against 95% of OLEDify Pure Black Wallpapers's.

UpkeepUpdate frequency

OLED Clock ships an update every 4 weeks, OLEDify Pure Black Wallpapers every 2 months. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

Scorecard7 real differences · 3 level
OLED Clock versus OLEDify Pure Black Wallpapers: the parameters behind the verdict, then further details
ParameterOLED ClockOLEDify Pure Black Wallpapers
PriceFreeFree
Rating3.9 (15 ratings)4.7 (342 ratings) — better
Positive reviews78.6% of reviews94.6% of reviews — better
Number of ratings15342 — better
Update frequencyEvery 4 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple TV — betteriPhone, iPad, iPod
Requires iOS12.010.0 — better
Further details — not scored
Size10 MB20 MB
Age rating4+4+
DeveloperChristian MoellerPranoy Chowdhury

Customer experience

OLED Clock

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

OLEDify Pure Black Wallpapers

All ratings342 ratings
Positive91.8%
Neutral3.8%
Negative4.4%
Written reviews37 reviews
Positive94.6%
Neutral0.0%
Negative5.4%

Bugs and requests

OLED Clock

Not enough reviews yet to summarise bugs or requests.

OLEDify Pure Black Wallpapers

Requested features

4 requests
  • Extend app features
  • Make app open source
  • Add XS Max overlay
  • How the threshold works?

In-app purchases

None

OLED Clock

No in-app purchases

5 purchases

OLEDify Pure Black Wallpapers

One-time5
  • Nice Tip$0.99
  • Kind Tip$2.99
  • Generous Tip$4.99
Show 2 more
  • Amazing Tip$6.99
  • Godzilla Tip$9.99

Questions

Is OLED Clock free?
OLED Clock is free to download, with no in-app purchases.
Is OLEDify Pure Black Wallpapers free?
OLEDify Pure Black Wallpapers is free to download, with in-app purchases available.
Which has better reviews, OLED Clock or OLEDify Pure Black Wallpapers?
OLEDify Pure Black Wallpapers is rated higher. OLED Clock averages 3.9 out of 5 from 15 ratings, while OLEDify Pure Black Wallpapers averages 4.7 from 342 ratings.
Do OLED Clock or OLEDify Pure Black Wallpapers have ads?
Neither OLED Clock nor OLEDify Pure Black Wallpapers shows ads.
Which is updated more often, OLED Clock or OLEDify Pure Black Wallpapers?
OLED Clock ships an update every 4 weeks, and OLEDify Pure Black Wallpapers every 2 months. Most recently, OLED Clock was updated on October 7, 2026 and OLEDify Pure Black Wallpapers on October 12, 2026.

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