# BlankState Diagnostic vs Semaphor

The clearest difference is in-app purchases: BlankState Diagnostic at none against Semaphor's 1. BlankState Diagnostic also leads on update cadence (every 4 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Semaphor sells 1 one-off in-app purchase. BlankState Diagnostic asks for nothing beyond the download.

BlankState Diagnostic ships an update every 4 days, Semaphor every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | BlankState Diagnostic | Semaphor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 months |
| Size | 1 MB | 10 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BlankState](https://appshunter.io/developer/1886824842) | [BEGRIP](https://appshunter.io/developer/899099115) |

## What reviewers say

### BlankState Diagnostic

[App page](https://appshunter.io/ios/app/blankstate-diagnostic/id6760920995)

**In-app purchases:** none


### Semaphor

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

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Semaphor Lifetime | $3.99 | one-time |


## Frequently asked questions

### Is BlankState Diagnostic free?

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

### Is Semaphor free?

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

### Do BlankState Diagnostic or Semaphor have ads?

Neither BlankState Diagnostic nor Semaphor shows ads.

### Which is updated more often, BlankState Diagnostic or Semaphor?

BlankState Diagnostic ships an update every 4 days, and Semaphor every 2 months. Most recently, BlankState Diagnostic was updated on October 24, 2026 and Semaphor on October 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.*