CalT vs Ducala
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CalT
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.
- Add, subtract, multiply, and divide time intervals
- Calculate difference between two dates/times
- Switch between result modes
- Lite and Dark themes
- Customizable accent colors
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CalT is an easy, convenient and perfect tool to perform Date & Time calculations. 1. Easily add, subtract, multiply and divide Minutes, Hours, Days, Months and even Years. 2. Switch between different result modes. 3. Choose between Lite and Dark app themes and pick your favorite color to make the app match your taste. DIFFERENCE Find out what is the difference between two dates and times. CalT is nothing superfluous and only that that is necessary for calculations of date and time.
Ducala
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Calculate in hours and minutes. up to thousand hours.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | CalT | Ducala |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 2.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 16 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 9 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Vladislav Kovalyov | Teerachart Jongkoldee |
In-app purchases
CalT
No in-app purchases
Ducala
No in-app purchases
