# Calendar Clock vs Twilight Time

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.

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.

## The numbers

| Metric | Calendar Clock | Twilight Time |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 41 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 4 MB | 36 MB |
| Requires iOS | 26.5 | **16.7.10** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Systemiko Inc.](https://appshunter.io/developer/680630947) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Calendar Clock

[App page](https://appshunter.io/ios/app/calendar-clock/id1451445740)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### Twilight Time

[App page](https://appshunter.io/ios/app/twilight-time/id6503278537)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calendar Clock free?

Calendar Clock costs $0.99, with no in-app purchases.

### Is Twilight Time free?

Twilight Time is free to download, with no in-app purchases.

### Do Calendar Clock or Twilight Time have ads?

Twilight Time shows ads; Calendar Clock does not.

### Which is updated more often, Calendar Clock or Twilight Time?

Calendar Clock ships an update every 41 months, and Twilight Time every 2 weeks. Most recently, Calendar Clock was updated on September 10, 2026 and Twilight Time on September 23, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*