SIDT vs CryptoDuck
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
CryptoDuck
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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
Verdict
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
Both are free to download. CryptoDuck sells 6 in-app purchases, starting at $0.99 per month. SIDT asks for nothing beyond the download.
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.
| Parameter | SIDT | CryptoDuck |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (3 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 14 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | 旭 赵 | Beijing Baitemi Technology Co., Ltd |
In-app purchases
SIDT
No in-app purchases
CryptoDuck
- Pro Monthly$0.991 Month
- Pro Yearly$7.991 Year
- Couple Pack$0.99
- Emoji Pack$0.99
- Festival Pack$0.99
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- Pro Lifetime$14.99









