Split Flap vs Momentous Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Split Flap
This utility app displays the time with an elegant split-flap design. It offers customizable themes, supports various time formats, and includes optional sound and seconds display.
- Split-flap time display
- Customizable themes
- 24-hour and 12-hour formats
- Optional seconds display
- Sound options
- Open source
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Elegantly show the time. Supports your device's locale - 24 hour formats and 12 hour formats Supports themes Can optionally show the seconds Has sound options Open source
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
The clearest difference is price: Momentous Clock at Free against Split Flap's $0.99. Momentous Clock also leads on update cadence (every 6 days vs every 17 months) and rating (5.0 vs 4.7). Split Flap's advantage is ratings volume (6 vs 2). On ads, 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
Momentous Clock is free to download; Split Flap costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Momentous Clock holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 6 and 2 respectively.
Split Flap ships an update every 17 months, Momentous Clock every 6 days. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.
| Parameter | Split Flap | Momentous Clock |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.7 (6 ratings) | 5.0 (2 ratings) — better |
| Number of ratings | 6 — better | 2 |
| Update frequency | Every 17 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 1 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Zac Gorak | Tutukain Software, LLC |
Customer experience
Split Flap
Momentous Clock
In-app purchases
Split Flap
No in-app purchases
Momentous Clock
No in-app purchases
Questions
Is Split Flap free?
Is Momentous Clock free?
Which has better reviews, Split Flap or Momentous Clock?
Do Split Flap or Momentous Clock have ads?
Which is updated more often, Split Flap or Momentous Clock?
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