# SignalClock Lite vs Decima

The clearest difference is in-app purchases: SignalClock Lite at none against Decima's 1. SignalClock Lite also leads on iOS requirement (12.0 vs 17.0). Decima's advantage is update cadence (every 2 months vs every 7 months). On price, ads and device support there is nothing between them.

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

SignalClock Lite ships an update every 7 months, Decima every 2 months. The most recent releases landed on September 9, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | SignalClock Lite | Decima |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 28 MB | 12 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Masafumi Endoh](https://appshunter.io/developer/757354996) | [Krzysztof Pawlowski](https://appshunter.io/developer/1216003515) |

## 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


### Decima

[App page](https://appshunter.io/ios/app/decima/id1498371556)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The Manipulator | $0.99 | one-time |


## Frequently asked questions

### Is SignalClock Lite free?

SignalClock Lite is free to download, with no in-app purchases.

### Is Decima free?

Decima is free to download, with in-app purchases available.

### Do SignalClock Lite or Decima have ads?

Neither SignalClock Lite nor Decima shows ads.

### Which is updated more often, SignalClock Lite or Decima?

SignalClock Lite ships an update every 7 months, and Decima every 2 months. Most recently, SignalClock Lite was updated on September 9, 2026 and Decima on September 25, 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.*