Decima vs Ninja Fight Clock
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Decima
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The application you have before you is but a small attempt at working with time. Since it's a precious commodity all we can do is spend it wisely. That's why I've decided to spend a bit of my time and create Decima (named after Roman Parca, the female personification of destiny) so that you don't have to ;) So what you can do with Decima? In the current version 1.1 (JosΓ©phine) you can: β’ create multiple timers β’ set multiple alerts per timer to track time expenditure β’ use it on both: your iPhone and Apple Watch (iPhone application is necessary) β’ start/stop timers on demand from your iPhone/iPad or Apple Watch β’ organize your time in sets β’ see total/partial time spent for a particular timer β’ automatically synchronise data between your iPhone and your Apple Watch (timer started on your phone can be paused on your Apple Watch and vice-versa) Have fun. Catch me at krzyspmac@twitter or contact (at) krzysp.net
Ninja Fight Clock
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This is a digital and analog clock application to fight the oncoming ninjas. When a ninja attacks, touch the bottom half of the screen. You can fight back with a shuriken or a sword. You can choose the interval between attacks from 10, 15, 20, 30, and 60 minutes. Since they appear at regular intervals, you may want to use them as an alarm when you feel sleepy, such as when you are studying. Each ninja uses its own unique ninjutsu. If your attack hits them several times, you can defeat them. If you tap the scrolls that sometimes appear on the screen, you can use various ninjutsu to fight back. The ninja will leave in one minute. If you defeat them all before they are gone, you will get the scroll from the beginning in the next battle. You can choose from 20 famous Japanese castles for the castle picture. You can also turn off the ninja action and enjoy it as just a clock. ***** The time text and analog clock can be moved with your finger. The picture and analog clock can be zoomed in and out with two fingers. Touch the time text to switch to setting mode. You can change the date and time to various formats by touching it in the setting mode. You can also switch between 12-hour and 24-hour displays. The screen can be rotated horizontally and vertically. By pressing buttons such as "2X" and "3X," the font size can be adjusted in steps. 20 types of backgrounds can be selected. Time signal tone can be selected from 78 different tones.
Screenshots
Verdict
The clearest difference is ads: Decima at none against Ninja Fight Clock's shown. Ninja Fight Clock's advantage is update cadence (every 3 weeks vs every 2 months) and iOS requirement (14.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Decima sells 1 one-off in-app purchase and Ninja Fight Clock sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Decima ships an update every 2 months, Ninja Fight Clock every 3 weeks. The most recent releases landed on September 25, 2026 and July 29, 2026 respectively.
| Parameter | Decima | Ninja Fight Clock |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 3 weeks β better |
| Ads | No β better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 14.0 β better |
| Further details β not scored | ||
| Size | 12 MB | 25 MB |
| Age rating | 4+ | 12+ |
| Developer | Krzysztof Pawlowski | Mihoko Araki |
In-app purchases
Decima
- The Manipulator$0.99
Ninja Fight Clock
- Ninja Fight Clock with no ads$2.99
Questions
Is Decima free?
Is Ninja Fight Clock free?
Do Decima or Ninja Fight Clock have ads?
Which is updated more often, Decima or Ninja Fight Clock?
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