# SignalClock vs On the hour

The clearest difference is price: On the hour at Free against SignalClock's $0.99. On the hour also leads on update cadence (weekly vs every 5 months). SignalClock's advantage is iOS requirement (12.0 vs 15.1). On ads, in-app purchases and device support there is nothing between them.

On the hour is free to download; SignalClock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SignalClock ships an update every 5 months, On the hour weekly. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | SignalClock | On the hour |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/on-the-hour/id6753136689/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | — | Free |
| Size | 103 MB | 28 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Masafumi Endoh](https://appshunter.io/developer/757354996) | [田丰 何](https://appshunter.io/developer/1674464316) |

## What reviewers say

### SignalClock

[App page](https://appshunter.io/ios/app/signalclock/id757354993)

**Features:** macOS Compatibility

**In-app purchases:** none


### On the hour

[App page](https://appshunter.io/ios/app/on-the-hour/id6753136689)

This utility app provides a single, focused function: a chime that sounds precisely on the hour. It's designed for users who need a simple, reliable auditory reminder of passing time.

**Highlights:** Hourly chime notification, Simple, single-function design, Reliable timekeeping alert

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SignalClock free?

SignalClock costs $0.99, with no in-app purchases.

### Is On the hour free?

On the hour is free to download, with no in-app purchases.

### Do SignalClock or On the hour have ads?

Neither SignalClock nor On the hour shows ads.

### Which is updated more often, SignalClock or On the hour?

SignalClock ships an update every 5 months, and On the hour weekly. Most recently, SignalClock was updated on November 1, 2026 and On the hour on October 30, 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.*