# Initial Services vs Knock Knock

The clearest difference is iOS requirement: Initial Services at 11.0 against Knock Knock's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Initial Services ships an update every 9 days, Knock Knock every 5 days. The most recent releases landed on September 25, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Initial Services | Knock Knock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 5 days** |
| Size | 28 MB | 42 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DREAMSTATE INTERACTIVE CC](https://appshunter.io/developer/694071975) | [Sarjan Patel](https://appshunter.io/developer/1817590129) |

## What reviewers say

### Initial Services

[App page](https://appshunter.io/ios/app/initial-services/id1560358697)

**Features:** macOS Compatibility

**In-app purchases:** none


### Knock Knock

[App page](https://appshunter.io/ios/app/knock-knock-gated-security/id6746636097)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Initial Services free?

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

### Is Knock Knock free?

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

### Do Initial Services or Knock Knock have ads?

Neither Initial Services nor Knock Knock shows ads.

### Which is updated more often, Initial Services or Knock Knock?

Initial Services ships an update every 9 days, and Knock Knock every 5 days. Most recently, Initial Services was updated on September 25, 2026 and Knock Knock on October 8, 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.*