# CalT vs Ducala

The clearest difference is price: Ducala at Free against CalT's $0.99. Ducala also leads on update cadence (fortnightly vs every 16 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Ducala is free to download; CalT costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CalT ships an update every 16 months, Ducala fortnightly. The most recent releases landed on September 16, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | CalT | Ducala |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/calt-date-and-time-calculator/id793926401/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 9 MB | 17 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vladislav Kovalyov](https://appshunter.io/developer/718333197) | [Teerachart Jongkoldee](https://appshunter.io/developer/1568703635) |

## What reviewers say

### CalT

[App page](https://appshunter.io/ios/app/calt-date-and-time-calculator/id793926401)

Perform calculations with dates and times, including adding, subtracting, multiplying, and dividing time intervals. Customize the app's appearance with themes and colors. Find the difference between two specific dates and times.

**Highlights:** Add, subtract, multiply, and divide time intervals, Calculate difference between two dates/times, Switch between result modes, Lite and Dark themes, Customizable accent colors

**Features:** macOS Compatibility

**In-app purchases:** none


### Ducala

[App page](https://appshunter.io/ios/app/ducala/id1568713313)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CalT free?

CalT costs $0.99, with no in-app purchases.

### Is Ducala free?

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

### Do CalT or Ducala have ads?

Neither CalT nor Ducala shows ads.

### Which is updated more often, CalT or Ducala?

CalT ships an update every 16 months, and Ducala fortnightly. Most recently, CalT was updated on September 16, 2026 and Ducala on September 13, 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.*