Comparison

TetraClock vs Digital Clock

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

Head to head
About

TetraClock

This clock app uses falling tetromino blocks to display the time. Customize colors, animations, and display formats. Note that the displayed time may have slight discrepancies due to animation effects.

Highlights
  • Tetromino block time display
  • Customizable colors and animations
  • 12/24-hour format
  • Seconds display toggle
  • Adjustable falling speed
  • Background color options
Features
Read full description

'TetraClock' is a clock app that represents the time by stacking seven types of single-sided tetromino-shaped blocks as they fall. The differences from the paid version are as follows: ・Contains ads ・No Watch App [How to Use] Tap the screen: Open the settings screen. Long press the screen: Stack the blocks again. [Main Features] - Switch between 12/24-hour display - Toggle seconds display ON/OFF - Monotone display - Fill in ON/OFF - Change outline color - Change transition animations - Change falling speed - Change background color [Notices] Due to the animation effect used for changing numbers, there may be a discrepancy between the displayed time and the actual time. Please do not use the displayed time as a basis for important decisions.

About

Digital Clock

Transform your device into a retro LED digital clock with a dot matrix design. Offers multiple time formats, vibrant color options, and a full-screen display. Ideal for bedside tables, desks, or any space needing an elegant timepiece.

Highlights
  • Authentic dot matrix design
  • Multiple time formats (12/24 hr, seconds on/off)
  • 6 vibrant LED color options
  • Full-screen display
  • Optimized for all iPhones and iPads
  • Simple tap-to-access settings
Features
Read full description

Transform your iPhone or iPad into a stunning retro LED display with this beautifully crafted digital clock app. Experience Nostalgic Digital Beauty Relive the classic era of LED displays with our authentic dot matrix design. Each number is rendered using hundreds of individual glowing dots, creating that iconic retro aesthetic that defined the digital age. Perfect for Any Space Whether it's your bedside table, kitchen counter, or office desk, this full-screen clock turns your iPhone or iPad into an elegant timepiece that's both functional and decorative. Features: Multiple Time Formats - Switch between 12-hour and 24-hour display - Toggle seconds on/off (HH:MM:SS or HH:MM) Beautiful Color Options - Choose from 6 vibrant LED colors: Yellow, Green, Cyan, Orange, Red, and Purple - Each color captures the authentic glow of classic LED displays Optimized for All iPhones and iPads - Automatically adjusts dot size for perfect viewing on iPad Mini, iPad Air, and iPad Pro - Crisp, clear display in both portrait and landscape orientations Simple Controls - Tap anywhere on the screen to access settings - Clean, intuitive interface that doesn't distract from the clock - Settings panel matches the retro dot matrix aesthetic Perfect for Any Time - Full-screen display with hidden status bar for distraction-free viewing - Ideal as a bedside clock, desk accessory, or ambient display - Low power consumption for extended use Why You'll Love It: The carefully crafted dot matrix rendering creates an authentic retro experience that's both nostalgic and modern. Each glowing dot is perfectly sized and spaced to recreate the classic LED displays you remember, while taking advantage of your iPad's beautiful screen. Transform your iPad into a piece of retro-futuristic art that tells time beautifully. Download Digital Clock - LED Retro today and bring the golden age of digital displays to your space.

Screenshots

TetraClock3 screens
Digital Clock4 screens

Verdict

The call

The clearest difference is rating: Digital Clock at 4.9 against TetraClock's 3.7. Digital Clock also leads on ads (none vs shown) and monetization model (free vs ad-supported). TetraClock's advantage is update cadence (every 2 days vs every 5 days) and iOS requirement (14.0 vs 18.1). On price, ratings volume, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Digital Clock holds the better App Store score, 4.9 against 3.7. Both are backed by a comparable volume of ratings — 3 and 8 respectively.

UpkeepUpdate frequency

TetraClock ships an update every 2 days, Digital Clock every 5 days. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
TetraClock versus Digital Clock: the parameters behind the verdict, then further details
ParameterTetraClockDigital Clock
PriceFreeFree
Rating3.7 (3 ratings)4.9 (8 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings38 — better
Update frequencyEvery 2 days — betterEvery 5 days
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better18.1
Further details — not scored
Size6 MB4 MB
Age rating4+4+
DeveloperLegal Prompt Inc.SeungJun Lee

In-app purchases

None

TetraClock

No in-app purchases

None

Digital Clock

No in-app purchases

Questions

Is TetraClock free?
TetraClock is free to download, with no in-app purchases.
Is Digital Clock free?
Digital Clock is free to download, with no in-app purchases.
Which has better reviews, TetraClock or Digital Clock?
Digital Clock is rated higher. TetraClock averages 3.7 out of 5 from 3 ratings, while Digital Clock averages 4.9 from 8 ratings.
Do TetraClock or Digital Clock have ads?
TetraClock shows ads; Digital Clock does not.
Which is updated more often, TetraClock or Digital Clock?
TetraClock ships an update every 2 days, and Digital Clock every 5 days. Most recently, TetraClock was updated on October 22, 2026 and Digital Clock on October 24, 2026.

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