One vs Ducala
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
One
A straightforward countdown timer for iPhone designed for ease of use. Its intuitive interface allows you to start and manage timers with a single tap, making it a convenient tool for daily tasks. The app focuses on essential functionality without unnecessary complexity.
- One-tap timer start and toggle
- Vivid and intuitive user interface
- Ergonomic design and functionality
- Convenient for everyday use
Read full descriptionHide full description
One-Tap Timer (tm) is a simple yet very convenient countdown timer app for your iPhone. It features a vivid and intuitive user interface with not more than just sufficient functionality. * Start and toggle your timer with just one tap. * Take advantage of our ergonomic design and functionality. * Use One-Tap Timer in your everyday life. Tip for Mac users: keep app icon in Dock.
Ducala
Read full descriptionHide full description
Calculate in hours and minutes. up to thousand hours.
Screenshots
Verdict
The clearest difference is update cadence: Ducala at fortnightly against One's every 23 months. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
One ships an update every 23 months, Ducala fortnightly. The most recent releases landed on September 28, 2026 and October 1, 2026 respectively.
| Parameter | One | Ducala |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 23 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 1 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Oleksandr Prosin | Teerachart Jongkoldee |
In-app purchases
One
No in-app purchases
Ducala
No in-app purchases
