# IYKYKnow vs Chartes

The clearest difference is update cadence: IYKYKnow at fortnightly against Chartes's every 6 weeks. IYKYKnow also leads on iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. IYKYKnow sells 2 one-off in-app purchases and Chartes sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

IYKYKnow ships an update fortnightly, Chartes every 6 weeks. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | IYKYKnow | Chartes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (48 ratings)](https://appshunter.io/ios/app/iykyknow/id1526156980/reviews)** | — |
| Number of ratings | **48** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 50 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Aniruddha Kadam](https://appshunter.io/developer/1526156982) | [Aiofeffect LLC](https://appshunter.io/developer/1833105894) |

## 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 |


### Chartes

[App page](https://appshunter.io/ios/app/chartes/id6756995293)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chartes Lifetime | $1.99 | one-time |


## Frequently asked questions

### Is IYKYKnow free?

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

### Is Chartes free?

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

### Do IYKYKnow or Chartes have ads?

Neither IYKYKnow nor Chartes shows ads.

### Which is updated more often, IYKYKnow or Chartes?

IYKYKnow ships an update fortnightly, and Chartes every 6 weeks. Most recently, IYKYKnow was updated on October 5, 2026 and Chartes on October 3, 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.*