ClockTron vs Momentous Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ClockTron
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ClockTron enhances user experiences in tracking their work schedule, breaks, and lunches. With a simple interface, ClockTron provides employee activity tracking with a single-click-check-in where work logs with activity detail can be submitted within seconds, giving HR and the employee up-to-the-minute records and peace of mind. For a free account contact us at info@schooltron.com.
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.
- 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
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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.
Screenshots
Verdict
ClockTron and Momentous Clock are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ClockTron ships an update every 2 weeks, Momentous Clock every 6 days. The most recent releases landed on September 17, 2026 and June 4, 2026 respectively.
| Parameter | ClockTron | Momentous Clock |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 2 weeks | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 16 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | SchoolTron inc | Tutukain Software, LLC |
In-app purchases
ClockTron
No in-app purchases
Momentous Clock
No in-app purchases
Questions
Is ClockTron free?
Is Momentous Clock free?
Do ClockTron or Momentous Clock have ads?
Which is updated more often, ClockTron or Momentous Clock?
Other comparisons
