# ChangeWatcher vs Semaphor

The clearest difference is in-app purchases: Semaphor at none against ChangeWatcher's 2. Semaphor also leads on ads (none vs shown). ChangeWatcher's advantage is update cadence (weekly vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. ChangeWatcher sells 2 in-app purchases, starting at $0.99 per month. Semaphor asks for nothing beyond the download.

ChangeWatcher ships an update weekly, Semaphor every 2 months. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | ChangeWatcher | Semaphor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 2 months |
| Size | 33 MB | 10 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Paolo Leonardi](https://appshunter.io/developer/1065225960) | [BEGRIP, s.r.o.](https://appshunter.io/developer/899099115) |

## What reviewers say

### ChangeWatcher

[App page](https://appshunter.io/ios/app/changewatcher/id6739185519)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad-Free Monthly | $0.99 | per month |
| Ad-Free Yearly | $4.99 | per year |


### Semaphor

[App page](https://appshunter.io/ios/app/semaphor-uptime-widget/id6775057196)

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

**In-app purchases:** none


## Frequently asked questions

### Is ChangeWatcher free?

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

### Is Semaphor free?

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

### Do ChangeWatcher or Semaphor have ads?

ChangeWatcher shows ads; Semaphor does not.

### Which is updated more often, ChangeWatcher or Semaphor?

ChangeWatcher ships an update weekly, and Semaphor every 2 months. Most recently, ChangeWatcher was updated on October 9, 2026 and Semaphor on October 6, 2026.

---

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