Comparison

SIDT vs CryptoDuck

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

Head to head
About

SIDT

This tool allows developers to debug and analyze HTTP requests. It supports various HTTP methods, header and parameter editing, and multiple encoding options. View responses in different formats, search results, and exchange data via QR code or Multipeer Connectivity.

Highlights
  • POST/GET/PUT/DELETE/HEAD method support
  • Header and parameter editing
  • Base64, MD5, SHA, CRC encoding
  • Response data display (Web/Text/JSON)
  • Data exchange via QR code/Multipeer Connectivity
  • Safari Share Extension integration
Features
Read full description

A Developer HTTP Request Debug Analyse Tool. - POST/GET/PUT/DELETE/HEAD Method support - Header, Parameter edit - Base64, MD5, SHA, CRC encoding - Timeout Setting - Response Data display in Web/Text/JSON format mode - Search Bar in Fire Result - JSON formatted display - Sent Request info - Status info - Response Cast Time - Data List edit/search - Data Exchange by Multipeer Connectivity and QR code - Directly add Data in Safari Share Extension - Search SIDT data in Spotlight - Also offer SIDT on macOS

About

CryptoDuck

Features
Read full description

CryptoDuck helps you and your friends create a secret language only insiders can read. Type a message, pick an encryption rule, and get ciphertext in one tap. Share it anywhere - only those who know the rule can decode it. Perfect for couples, close friends, and fun group chats. [Core Features] - Encrypt and decrypt text with custom rules - Build your own cipher: letters, numbers, emoji - mix freely - Rule management: create, edit, import, export, and share via Deep Link - Share as plain text, file, or beautiful ciphertext card (Pro: no watermark) - History: auto-save sessions with one-tap refill (Pro) - Rule Store: couple packs, emoji ciphers, gaming codes and more [System Extensions] - Home Screen Widget: see your active rule, jump straight to encrypt or decrypt - Shortcuts: encrypt or decrypt without opening the app, results copied to clipboard (Pro) - iCloud sync: keep rules across your devices (Pro) [Privacy First] - Plaintext, ciphertext, and rules stay on your device by default - No ads, no third-party analytics, no cross-app tracking - Optional iCloud sync is handled by Apple [Free vs Pro] Free: 3 manual rules, 12 total, 500 chars per encryption Pro: unlimited rules, no char limit, history, iCloud sync, watermark-free cards, Widget, Shortcuts and all paid rule packs [Important Notice] CryptoDuck uses custom character mapping - not AES or military-grade cryptography. Do not use for highly sensitive data. Ideal for fun secret messaging between people who share a rule. Download CryptoDuck and start your secret conversation. [Auto-Renewable Pro Subscription] 1. Subscription: Continuous (Monthly/Yearly) Pro Membership 2. Duration: One month or one year. Pro features are available during the active subscription period. 3. Price: Monthly and Yearly plans available (actual price shown on the App Store purchase sheet). 4. Payment: Charged to your Apple ID account upon confirmation of purchase. 5. Cancellation: To cancel auto-renewal, turn it off at least 24 hours before the current period ends in Settings > Apple ID > Subscriptions. Otherwise, the subscription renews automatically. 6. Renewal: Your Apple ID account will be charged within 24 hours before the period ends. Upon successful payment, the subscription extends for one more period (1 month or 1 year). 7. Privacy Policy: https://baitemi.com/jmy/privacy.html 8. Subscription Terms: https://baitemi.com/jmy/subscription.html

Screenshots

SIDT4 screens
CryptoDuck4 screens

Verdict

The call

The clearest difference is in-app purchases: SIDT at none against CryptoDuck's 6. SIDT also leads on update cadence (every 2 weeks vs every 3 months) and iOS requirement (11.0 vs 16.0). On price, 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

Both are free to download. CryptoDuck sells 6 in-app purchases, starting at $0.99 per month. SIDT asks for nothing beyond the download.

UpkeepUpdate frequency

SIDT ships an update every 2 weeks, CryptoDuck every 3 months. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 7 level
SIDT versus CryptoDuck: the parameters behind the verdict, then further details
ParameterSIDTCryptoDuck
PriceFreeFree
Rating4.0 (3 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 2 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better16.0
Further details — not scored
Size14 MB11 MB
Age rating4+4+
Developer旭 赵Beijing Baitemi Technology Co., Ltd

In-app purchases

None

SIDT

No in-app purchases

6 purchases

CryptoDuck

Subscriptions2
  • Pro Monthly$0.991 Month
  • Pro Yearly$7.991 Year
One-time4
  • Couple Pack$0.99
  • Emoji Pack$0.99
  • Festival Pack$0.99
Show 1 more
  • Pro Lifetime$14.99

Questions

Is SIDT free?
SIDT is free to download, with no in-app purchases.
Is CryptoDuck free?
CryptoDuck is free to download, with in-app purchases available.
Do SIDT or CryptoDuck have ads?
Neither SIDT nor CryptoDuck shows ads.
Which is updated more often, SIDT or CryptoDuck?
SIDT ships an update every 2 weeks, and CryptoDuck every 3 months. Most recently, SIDT was updated on November 3, 2026 and CryptoDuck on October 28, 2026.

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