# CertTool vs Fastly Observe

The clearest difference is iOS requirement: CertTool at 16.6 against Fastly Observe's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | CertTool | Fastly Observe |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 6 MB | 10 MB |
| Requires iOS | **16.6** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tim Wilbrink](https://appshunter.io/developer/412396045) | [Fastly, Inc.](https://appshunter.io/developer/1861643314) |

## What reviewers say

### CertTool

[App page](https://appshunter.io/ios/app/certtool/id6742362154)

**Features:** macOS Compatibility

**In-app purchases:** none


### Fastly Observe

[App page](https://appshunter.io/ios/app/fastly-observe/id6760856250)

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

**In-app purchases:** none


## Frequently asked questions

### Is CertTool free?

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

### Is Fastly Observe free?

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

### Do CertTool or Fastly Observe have ads?

Neither CertTool nor Fastly Observe shows ads.

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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.*