Comparison

Dual up down timer vs Ninja Fight Clock

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Dual up down timer

This utility app provides a straightforward heat-up and cool-down timer. It features a simple interface and visual cues, with screen flashes indicating the end of each interval.

Highlights
  • Heat up and cool down timer
  • Simple user interface
  • Screen flash alerts
  • Interval timing
Features
Read full description

With a simple user interface users can quickly setup and use a heat up and cool down styled timer. The screen flashs black at the end of the heat up portion and white at the end of the cool down portion.

About

Ninja Fight Clock

Features
Read full description

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

Dual up down timer1 screens
Ninja Fight Clock3 screens

Verdict

The call

The clearest difference is in-app purchases: Dual up down timer at none against Ninja Fight Clock's 1. Dual up down timer also leads on ads (none vs shown) and iOS requirement (11.2 vs 14.0). Ninja Fight Clock's advantage is update cadence (every 3 weeks vs every 4 months). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Ninja Fight Clock sells 1 one-off in-app purchase. Dual up down timer asks for nothing beyond the download.

UpkeepUpdate frequency

Dual up down timer ships an update every 4 months, Ninja Fight Clock every 3 weeks. The most recent releases landed on October 5, 2026 and October 1, 2026 respectively.

Scorecard4 real differences · 6 level
Dual up down timer versus Ninja Fight Clock: the parameters behind the verdict, then further details
ParameterDual up down timerNinja Fight Clock
PriceFreeFree
Rating4.8 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS11.2 — better14.0
Further details — not scored
Size10 MB25 MB
Age rating4+12+
DeveloperRD ConceptsMihoko Araki

In-app purchases

None

Dual up down timer

No in-app purchases

1 purchases

Ninja Fight Clock

One-time1
  • Ninja Fight Clock with no ads$2.99

Questions

Is Dual up down timer free?
Dual up down timer is free to download, with no in-app purchases.
Is Ninja Fight Clock free?
Ninja Fight Clock is free to download, with in-app purchases available.
Do Dual up down timer or Ninja Fight Clock have ads?
Ninja Fight Clock shows ads; Dual up down timer does not.
Which is updated more often, Dual up down timer or Ninja Fight Clock?
Dual up down timer ships an update every 4 months, and Ninja Fight Clock every 3 weeks. Most recently, Dual up down timer was updated on October 5, 2026 and Ninja Fight Clock on October 1, 2026.

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