Calendar Clock vs Twilight Time
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calendar Clock
This app displays the current year, month, week, and time on a single screen with a clean design. It offers customizable theme colors and functions as a desk clock. The app disables device sleep mode while active.
- All-in-one screen display
- Year, month, week, day, hour, minute, second
- Switchable theme colors (dark, light, green, blue)
- Disables device sleep mode
- Acts as a desk clock
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Time and date, beautifully together. Calendar Clock is a simple, elegant time-and-calendar app designed for iPhone and iPad. See the current time and the entire month at a glance, with a clean interface that stays out of your way. Features * Large digital clock — View the current system time clearly and instantly. * 24-hour or 12-hour format — Swipe across the clock to switch between 24-hour and AM/PM formats. * Monthly calendar — See the full month with the current year and month displayed above it. * Swipe through months — Swipe left or right on the calendar to move between months. * Today at a glance — Today's date is highlighted with a red circle. * Weekend highlighting — Saturdays and Sundays are displayed in red. * Multiple themes — Swipe up or down to change the screen theme. * Remembers your preferences — Your selected clock format and theme are preserved. * iPhone & iPad — Designed for both iPhone and iPad. Simple by design No complicated menus. No unnecessary controls. Just the time and the calendar, exactly when you need them. Calendar Clock — See time. See your day. Note that this application disables your device's sleep mode while running, so make sure you have enough battery life. *Important notice: Use the information recoded or functionality provided in / or generated with this application only as a rough indication, rough estimates or as a rough guide. Even though we do our best to provide you with confirmed information and tried-and-tested features, the accuracy and successful operation and performance of the application are NOT GUARANTEED by us. Users are strongly advised to confirm the information of their interest with other sources and not to ultimately rely on functionality and performance of this application. This application is provided “as is” and with all faults. You bear the risk of using it. We shall not be responsible or liable for any loss or damage of any kind incurred as a result of the use of functions or the content of this application. By using this application you are agreeing to these terms. If you do not agree to these terms do not use this application.
Twilight Time
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Shows the time before sunrise and after sunset when the sun is below the horizon and it is bright outside (twilight). Twilight 1. Civil twilight 2. Nautical twilight 3. Astronomical twilight
Screenshots
Verdict
The clearest difference is price: Twilight Time at Free against Calendar Clock's $0.99. Twilight Time also leads on update cadence (every 2 weeks vs every 41 months) and iOS requirement (16.7.10 vs 26.5). Calendar Clock's advantage is ads (none vs shown). On 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
Twilight Time is free to download; Calendar Clock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Calendar Clock ships an update every 41 months, Twilight Time every 2 weeks. The most recent releases landed on September 10, 2026 and September 23, 2026 respectively.
| Parameter | Calendar Clock | Twilight Time |
|---|---|---|
| Price | $0.99 | Free — better |
| Positive reviews | 0.0% of reviews | — |
| Update frequency | Every 41 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.5 | 16.7.10 — better |
| Further details — not scored | ||
| Size | 4 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | Systemiko Inc. | Hideaki Uchikoshi |
In-app purchases
Calendar Clock
No in-app purchases
Twilight Time
No in-app purchases
Questions
Is Calendar Clock free?
Is Twilight Time free?
Do Calendar Clock or Twilight Time have ads?
Which is updated more often, Calendar Clock or Twilight Time?
Other comparisons
