RFCReader Pro vs HelvetiKit

Requests for Comments (RFC) document series contain technical and organizational notes about the Internet. RFC Reader plus is a tool which can provide user a more efficient way to read the RFC documents.  Difference between trial version and full functional version: Features for RFC Reader plus trial version and full functional version are almost the same, except that some advance feature in trial version can be used with limitation. All features below are available for try with limited times with trial version and are fully supported by full functional version if user purchased the product in the app. 1. List all RFC documents 2. Search RFC File by Keywords or RFC number 3. Add to favorite for the interested RFC 4. Support marking text with color when reading in text format 5. Support adding Bold, Itatic and Underline styles to RFC text when reading in text format 6. Support changing default Font name and Font size for RFC text reading 7. Support fast navigating to last reading position and can go back and forward several times 8. Support fast navigating with Table Of Contents (TOC) 9. Offline RFC reading: Once you read it once, it will be cached locally 10. Save your changes to the document in Document folder 11.Support both Landscape and Portrait reading mode on all supported devices. 12. Support cleaning up cached files 13. Support search by keywords in Text format RFC page and navigate to the found results 14. Support read RFC in PDF format 15. Support searching RFC content when reading in PDF format 16. Support navigate RFC content through Table Of Content when reading in PDF format 17. Support navigate RFC content through PDF thumbnail 18. Support view RFC content in thumbnail grid view 19. Support read RFC in HTML format 20. Support navigate back and forth when reading in HTML format 21.Support navigate through Table Of Content when reading in HTML format for some RFCs 22. Support add to favorite RFC list when reading both in PDF format and HTML format 23. Support system Dark Mode

25 developer utilities in one focused toolbox. HelvetiKit brings code, text, conversions, generators, and network diagnostics to iPhone, iPhone Duo, and iPad. Find tools by name or keyword, pin your favorites, and keep your input while switching tools during a session. SMART PASTE Use the system Paste button to recognize copied content and open a matching tool with your input ready. Recognition runs on your device. CODE AND TEXT - Format, minify, validate, sort, and convert JSON to YAML. - Decode JWT headers, payloads, and claims. Inspect expiry; signatures are not verified. - Test regular expressions with flags, capture groups, highlighting, and replacement. - Compare text line by line and highlight changed characters with Text Diff. - Count characters, words, lines, and bytes with Text Inspector. - Convert CSV to JSON and back with delimiter detection and table previews. - Sort, deduplicate, trim, quote, and join text with Line Tools. - Build and inspect Unix file permissions with Chmod. ENCODE AND HASH - Encode and decode Base64, including URL-safe and wrapped input. - Encode and decode URLs and escape or unescape strings. - Calculate text and file hashes, HMAC, and compare checksums. CONVERT AND GENERATE - Convert HEX, RGB, and HSL colors and check WCAG contrast ratios. - Convert large numbers between binary, octal, decimal, and hexadecimal. - Convert Unix timestamps and dates; follow a live Unix clock. - Change text case and inspect Cron schedules. - Generate UUID v4 and v7, passwords, and Lorem Ipsum. QR AND NETWORK TOOLS - Generate QR codes with selectable error correction, share images, and scan QR codes and barcodes with the camera or a photo. - Query DNS records using a choice of DNS-over-HTTPS resolvers. - View public IP information and local interface addresses. - Measure HTTP request latency with a timing breakdown. - Calculate IPv4 and IPv6 subnet details. A WORKSPACE THAT FITS Return to recent tools from Home. Use syntax-colored JSON and YAML, symbol input shortcuts, sample inputs, and regex presets. Choose your appearance and clear session data or recent tools in Settings. Compact navigation keeps tools close at hand. Wider layouts show the library beside your workspace and place input alongside results when space allows. Supports light and dark appearances, larger text, English, and Simplified Chinese. PRIVACY-MINDED BY DESIGN Local tools process input on your device. Recent tool input stays in memory during the app session. Network tools contact the selected resolver, lookup service, or host only when you run them. Camera and photo access are optional QR features. No separate app account is required. TRY IT, THEN GO PRO Try 10 tool runs for free. An optional one-time HelvetiKit Pro purchase unlocks unlimited runs. Restore Purchase is available in the Pro sheet.