Comparison

Momentous Clock vs Pixel Clock

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

Head to head
About

Momentous Clock

This app transforms your device's clock into a dynamic display of mathematical properties and number theory facts for the current time. It optionally reveals personal number connections from your contacts, all processed securely on your device.

Highlights
  • Computes mathematical properties of time
  • Surfaces number theory facts
  • Displays time on 16-segment LED screens
  • Finds personal number connections in contacts
  • On-device contact matching
  • Works via Catalyst on Mac
Features
Read full description

Time isn’t just 6:31. It’s 631 - a prime! A lucky prime... It’s the combination to the bike lock you had as a kid. It might be the last digits of the cell phone of someone you love. This is a clock for people who notice things like that. Every minute, it: • Computes mathematical properties of the current time • Surfaces number theory facts (prime, factorization, powers, sequences, curiosities) • Scrambles them onto glowing 16-segment LED displays, like your old Speak 'n Spell • Optionally finds personal number connections in your contacts — entirely on device Works great as a Mac app via Catalyst. Contact matching happens entirely on device. No personal data is ever transmitted. Usage analytics (anonymous) are collected to improve the app. If you’ve ever factored timestamps in your head, smiled at 5:12 = 2⁹, or paused at 17:29… This is the clock for you. Make every minute momentous.

About

Pixel Clock

Features
Read full description

Make time a little more playful with Pixel Clock - Grid, a landscape pixel clock for your desk, nightstand or wall. NEW: CYBER CITY Watch the time on a giant billboard in a living neon city, with flying traffic, rain, glowing windows and a cozy window view with a sill you can play with. Turn on Music Visualizer and the city pulses to the sound around you. Cyber City is a premium face: try it free for 24 hours, then unlock it forever with a one-time purchase. No subscription. CLASSIC (FREE) Animated pixel digits with customizable colors, backgrounds and themes, a moving RGB border, falling-digit transitions, heart balloons when you shake, and a weekday indicator. DUAL TIME (FREE) See a second time zone side by side, adjust its offset, and enjoy shatter-and-restore effects and a seconds progress bar. MAKE IT YOURS 12/24-hour time, seconds, date, weekday and battery display, in 13 languages. Works on iPhone and iPad. The microphone is used only for Music Visualizer. Sound is analyzed on your device and never recorded.

Screenshots

Momentous Clock4 screens
Pixel Clock4 screens

Verdict

The call

The clearest difference is in-app purchases: Momentous Clock at none against Pixel Clock's 2. On price, update cadence, 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. Pixel Clock sells 2 one-off in-app purchases. Momentous Clock asks for nothing beyond the download.

UpkeepUpdate frequency

Momentous Clock ships an update every 6 days, Pixel Clock weekly. Both last shipped on October 24, 2026.

Scorecard1 real difference · 8 level
Momentous Clock versus Pixel Clock: the parameters behind the verdict, then further details
ParameterMomentous ClockPixel Clock
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 6 days — betterWeekly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size24 MB100 MB
Age rating4+4+
DeveloperTutukain Software, LLCYIMING SHI

In-app purchases

None

Momentous Clock

No in-app purchases

2 purchases

Pixel Clock

One-time2
  • Cyber City 1-day TrialFree
  • Cyber City – Unlock Forever$2.99

Questions

Is Momentous Clock free?
Momentous Clock is free to download, with no in-app purchases.
Is Pixel Clock free?
Pixel Clock is free to download, with in-app purchases available.
Do Momentous Clock or Pixel Clock have ads?
Neither Momentous Clock nor Pixel Clock shows ads.
Which is updated more often, Momentous Clock or Pixel Clock?
Momentous Clock ships an update every 6 days, and Pixel Clock weekly. Most recently, Momentous Clock was updated on October 24, 2026 and Pixel Clock on October 24, 2026.

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