# IYKYKnow vs Note by Xi

The clearest difference is price: IYKYKnow at Free against Note by Xi's $0.99. IYKYKnow also leads on iOS requirement (13.0 vs 17.6). Note by Xi's advantage is in-app purchases (none vs 2). On update cadence, ads and device support there is nothing between them.

IYKYKnow is free to download; Note by Xi costs $0.99 up front. IYKYKnow sells 2 one-off in-app purchases. Note by Xi asks for nothing beyond the download.

IYKYKnow ships an update fortnightly, Note by Xi every 8 days. The most recent releases landed on October 22, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | IYKYKnow | Note by Xi |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| 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 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 56 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aniruddha Kadam](https://appshunter.io/developer/1526156982) | [鉴 郗](https://appshunter.io/developer/559961494) |

## 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 |


### Note by Xi

[App page](https://appshunter.io/ios/app/note-by-xi-the-cleanest-note/id6757339447)

**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 Note by Xi free?

Note by Xi costs $0.99, with no in-app purchases.

### Do IYKYKnow or Note by Xi have ads?

Neither IYKYKnow nor Note by Xi shows ads.

### Which is updated more often, IYKYKnow or Note by Xi?

IYKYKnow ships an update fortnightly, and Note by Xi every 8 days. Most recently, IYKYKnow was updated on October 22, 2026 and Note by Xi on October 19, 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.*