Comparison

IYKYKnow vs Privacy Defender

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Invisible message sending
  • Works with iMessage, SMS, WhatsApp, Telegram
  • Compatible with email apps
  • Privacy-focused, no server communication
  • Local encryption and decryption
Features
Read full description

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

About

Privacy Defender

Features
Read full description

Privacy Defender gives you total control over your personal information, combining powerful encryption with an intuitive interface for maximum data privacy. Whether you're storing passwords, notes, photos, or confidential files, everything stays secure in one protected vault — accessible only by you. Key Features: Military-Grade Encryption – AES-256 encryption to keep your data private and safe. Secure File Storage – Safely store sensitive documents, images, and media. Biometric Access – Unlock your vault using Face ID or Touch ID for convenience and security. Auto-Lock Vault – Automatically locks the app after inactivity to ensure your privacy. Dark Mode Support – A clean, modern design that adapts to your device’s theme. Offline Access – Access your data anytime, anywhere, without needing an internet connection. No Account Required – Your data stays on your device. No sign-ups. No tracking. Who is it for? Ideal for anyone who values personal privacy — from professionals securing client documents to students locking away private notes. Why Privacy Defender? Unlike cloud-based solutions, Privacy Defender doesn’t store or transmit your data externally. It lives solely on your device, putting your privacy truly in your hands. Need Help or Have Questions? Check out our support portal: https://zub165.github.io/Privacy-Protector/

Screenshots

IYKYKnow4 screens
Privacy Defender4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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

Scorecard4 real differences · 6 level
IYKYKnow versus Privacy Defender: the parameters behind the verdict, then further details
ParameterIYKYKnowPrivacy Defender
PriceFree — better$4.99
Rating4.3 (47 ratings) — better—
Positive reviews33.3% of reviews—
Number of ratings47 — better—
Update frequencyFortnightly — betterEvery 5 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.0 — better15.0
Further details — not scored
Size18 MB29 MB
Age rating4+4+
DeveloperAniruddha KadamMuhammad Saeed Malik

In-app purchases

2 purchases

IYKYKnow

One-time2
  • Icon Pack$0.99
  • App Secret Mode$2.99
None

Privacy Defender

No in-app purchases

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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