IYKYKnow vs Note by Xi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
IYKYKnow
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.
- Invisible message sending
- Works with iMessage, SMS, WhatsApp, Telegram
- Compatible with email apps
- Privacy-focused, no server communication
- Local encryption and decryption
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The message sent using IYKYK keyboard app. Is completely invisible to anyone try to read your private messages. It avoid suspicion, If you are chatting with someone in secret. Remember to use this for private use and not to misuse. IYKYK app respects privacy. So there is no server communication for encryption and decryption process. Anyone who has access to "IYKYK" app will be able to decrypt the hidden message. Compatible with: - iMessage, SMS, Whatsapp, Telegram.. etc - Any Emailing app : Gmail, Yahoo MAIL...etc In conclusion ...any text messaging app
Note by Xi
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NOTE by Xi is an amazing note app ：D
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | IYKYKnow | Note by Xi |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.3 (47 ratings) — better | — |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 47 — better | — |
| Update frequency | Fortnightly | Every 8 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 18 MB | 56 MB |
| Age rating | 4+ | 4+ |
| Developer | Aniruddha Kadam | 鉴 郗 |
In-app purchases
IYKYKnow
- Icon Pack$0.99
- App Secret Mode$2.99
Note by Xi
No in-app purchases
