# SignalClock vs Dots Calendar

The clearest difference is price: Dots Calendar at Free against SignalClock's $0.99. Dots Calendar also leads on update cadence (every 5 weeks vs every 5 months). SignalClock's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 18.2). On ads and device support there is nothing between them.

Dots Calendar is free to download; SignalClock costs $0.99 up front. Dots Calendar sells 1 one-off in-app purchase. SignalClock asks for nothing beyond the download.

SignalClock ships an update every 5 months, Dots Calendar every 5 weeks. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | SignalClock | Dots Calendar |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 5 weeks** |
| Size | 103 MB | 1 MB |
| Requires iOS | **12.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Masafumi Endoh](https://appshunter.io/developer/757354996) | [Nicolas Schimmelpfennig](https://appshunter.io/developer/1884081235) |

## What reviewers say

### SignalClock

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Dots Calendar

[App page](https://appshunter.io/ios/app/dots-calendar/id6760355945)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime license | $2.99 | one-time |


## Frequently asked questions

### Is SignalClock free?

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

### Is Dots Calendar free?

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

### Do SignalClock or Dots Calendar have ads?

Neither SignalClock nor Dots Calendar shows ads.

### Which is updated more often, SignalClock or Dots Calendar?

SignalClock ships an update every 5 months, and Dots Calendar every 5 weeks. Most recently, SignalClock was updated on October 13, 2026 and Dots Calendar on October 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.*