# IYKYKnow vs Privacy Defender

The clearest difference is price: IYKYKnow at Free against Privacy Defender's $4.99. IYKYKnow also leads on update cadence (fortnightly vs every 5 months) and iOS requirement (13.0 vs 15.0). Privacy Defender's advantage is in-app purchases (none vs 2). On ads and device support there is nothing between them.

IYKYKnow is free to download; Privacy Defender costs $4.99 up front. IYKYKnow sells 2 one-off in-app purchases. Privacy Defender asks for nothing beyond the download.

IYKYKnow ships an update fortnightly, Privacy Defender every 5 months. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | IYKYKnow | Privacy Defender |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.3 (47 ratings)](https://appshunter.io/ios/app/iykyknow/id1526156980/reviews)** | — |
| Number of ratings | **47** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 29 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Aniruddha Kadam](https://appshunter.io/developer/1526156982) | [Muhammad Saeed Malik](https://appshunter.io/developer/1477437464) |

## What reviewers say

### IYKYKnow

[App page](https://appshunter.io/ios/app/iykyknow/id1526156980)

This utility app allows you to send invisible messages within your existing messaging applications. It helps maintain privacy and avoid suspicion when communicating secretly. The app ensures no server communication for encryption, keeping your data local.

**Highlights:** Invisible message sending, Works with iMessage, SMS, WhatsApp, Telegram, Compatible with email apps, Privacy-focused, no server communication, Local encryption and decryption

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Icon Pack | $0.99 | one-time |
| App Secret Mode | $2.99 | one-time |


### Privacy Defender

[App page](https://appshunter.io/ios/app/privacy-defender/id6744383982)

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

**In-app purchases:** none


## Frequently asked questions

### Is IYKYKnow free?

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

### Is Privacy Defender free?

Privacy Defender costs $4.99, with no in-app purchases.

### Do IYKYKnow or Privacy Defender have ads?

Neither IYKYKnow nor Privacy Defender shows ads.

### Which is updated more often, IYKYKnow or Privacy Defender?

IYKYKnow ships an update fortnightly, and Privacy Defender every 5 months. Most recently, IYKYKnow was updated on October 22, 2026 and Privacy Defender 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.*