Comparison

Cryptic Send vs Knock Messaging

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

Head to head
About

Cryptic Send

Encrypt your text messages within iMessage for enhanced privacy. Share sensitive information securely using a secret key, with options for messages to expire. Ideal for private conversations and situations requiring extra message control.

Highlights
  • Encrypt messages within iMessage
  • Use a secret key for decryption
  • Set messages to expire
  • Auto-load and decrypt messages
  • Add privacy to personal conversations
Features
Read full description

Send private messages inside iMessage with an extra layer of protection. Cryptic Send helps you encrypt messages before you send them, so only someone with the same secret key can read them. It is built for private conversations, sensitive details, and moments when you want more control over who can see your message. Why people use Cryptic Send • Add privacy to messages sent through iMessage • Encrypt messages with your own secret key • Auto-load and decrypt messages when opened in the extension • Set messages to expire for extra privacy • Keep message content out of plain view if someone else accesses the device How it works 1. Write your message 2. Enter your secret key 3. Send through iMessage 4. The recipient opens the message and uses the same key to decrypt it Built for privacy Cryptic Send is designed to protect message content before it is sent. Only the correct key can unlock the original text. For even more control, you can choose message expiration for conversations that should not stay readable forever. Great for • Personal conversations • Sensitive information • Extra privacy on shared or accessible devices • Anyone who wants more control over message visibility Important Both people need the same secret key to decrypt the message. If you want a simple way to send more private messages inside iMessage, Cryptic Send gives you that extra layer without leaving your normal messaging flow.

About

Knock Messaging

Features
Read full description

Knock Messaging lets you send messages and media through iMessage. Recipients can instantly view shared content using an App Clip or the full app. The App Clip provides a fast and lightweight way to preview messages without installing the full app. Knock Messaging is designed for simple, direct message sharing with a seamless experience across supported devices.

Screenshots

Cryptic Send4 screens
Knock Messaging4 screens

Verdict

The call

The clearest difference is update cadence: Knock Messaging at every 5 days against Cryptic Send's every 5 months. On price, ads, in-app purchases 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Cryptic Send ships an update every 5 months, Knock Messaging every 5 days. The most recent releases landed on September 15, 2026 and September 19, 2026 respectively.

Scorecard1 real difference · 9 level
Cryptic Send versus Knock Messaging: the parameters behind the verdict, then further details
ParameterCryptic SendKnock Messaging
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 5 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.615.0 — better
Further details — not scored
Size1 MB36 MB
Age rating4+4+
DeveloperCryptific LLCBaseline Polls Limited Liability Company

In-app purchases

None

Cryptic Send

No in-app purchases

None

Knock Messaging

No in-app purchases

Questions

Is Cryptic Send free?
Cryptic Send is free to download, with no in-app purchases.
Is Knock Messaging free?
Knock Messaging is free to download, with no in-app purchases.
Do Cryptic Send or Knock Messaging have ads?
Neither Cryptic Send nor Knock Messaging shows ads.
Which is updated more often, Cryptic Send or Knock Messaging?
Cryptic Send ships an update every 5 months, and Knock Messaging every 5 days. Most recently, Cryptic Send was updated on September 15, 2026 and Knock Messaging on September 19, 2026.

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