Comparison

SignalClock Lite 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

SignalClock Lite

This utility app displays a digital clock with a time signal function using local notifications. It offers multiple sound sets and font options. The free version has limitations on scheduling time signals to half-hour intervals.

Highlights
  • Local notification time signals
  • Multiple sound sets
  • iOS 10 font support
  • Half-hour signal scheduling (free edition)
  • Digital clock display
Features
Read full description

Digital clock has time signal function based on Local Notification Center. It’s free edition of “SignalClock”. 5 different signal sound sets. All fonts iOS 10 supports are available in clock. 5 tone type are available in all sound file sets. Free edition limitations : - Able to schedule time signals on half hour unit ex. 00:00, 00:30, 01:00 ...

About

Ninja Fight Clock

Features
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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

SignalClock Lite1 screens
Ninja Fight Clock3 screens

Verdict

The call

The clearest difference is in-app purchases: SignalClock Lite at none against Ninja Fight Clock's 1. SignalClock Lite also leads on ads (none vs shown) and iOS requirement (12.0 vs 14.0). Ninja Fight Clock's advantage is update cadence (every 3 weeks vs every 7 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. SignalClock Lite asks for nothing beyond the download.

UpkeepUpdate frequency

SignalClock Lite ships an update every 7 months, Ninja Fight Clock every 3 weeks. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

Scorecard4 real differences · 4 level
SignalClock Lite versus Ninja Fight Clock: the parameters behind the verdict, then further details
ParameterSignalClock LiteNinja Fight Clock
PriceFreeFree
Positive reviews0.0% of reviews—
Update frequencyEvery 7 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better14.0
Further details — not scored
Size28 MB25 MB
Age rating4+12+
DeveloperMasafumi EndohMihoko Araki

In-app purchases

None

SignalClock Lite

No in-app purchases

1 purchases

Ninja Fight Clock

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

Questions

Is SignalClock Lite free?
SignalClock Lite 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 SignalClock Lite or Ninja Fight Clock have ads?
Ninja Fight Clock shows ads; SignalClock Lite does not.
Which is updated more often, SignalClock Lite or Ninja Fight Clock?
SignalClock Lite ships an update every 7 months, and Ninja Fight Clock every 3 weeks. Most recently, SignalClock Lite was updated on November 1, 2026 and Ninja Fight Clock on October 27, 2026.

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