# SignalClock Lite vs Ninja Fight Clock

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.

Both are free to download. Ninja Fight Clock sells 1 one-off in-app purchase. SignalClock Lite asks for nothing beyond the download.

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

## The numbers

| Metric | SignalClock Lite | Ninja Fight Clock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 28 MB | 25 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Masafumi Endoh](https://appshunter.io/developer/757354996) | [Mihoko Araki](https://appshunter.io/developer/1476136915) |

## What reviewers say

### SignalClock Lite

[App page](https://appshunter.io/ios/app/signalclock-lite/id908918011)

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:** macOS Compatibility

**In-app purchases:** none


### Ninja Fight Clock

[App page](https://appshunter.io/ios/app/ninja-fight-clock/id6461210488)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ninja Fight Clock with no ads | $2.99 | one-time |


## Frequently asked 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 November 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*