Call.com vs RC Designer

Your second phone number in an app. A real virtual number you can use on any device — no SIM cards, no extra phones. Call.com gives you a dedicated second line for work, travel, or personal use. Choose a local number in the US, UK, France, Canada, Mexico, Australia, Austria, Belgium, Finland, and Puerto Rico, with more countries coming soon. VOICE CALLS Make crystal-clear calls to mobiles and landlines worldwide at low rates. Call other Call.com users for free. SMS Send affordable SMS messages to any mobile number in the world. VIDEO CALLS One-to-one or group HD video calls with up to 10 participants. Free between Call.com users. CHAT & VOICE MESSAGES Full-featured chat with support for images, files, emojis, and voice messages. WHO IT'S FOR — Freelancers & Small Business: A dedicated work line to separate business and personal communication. Project a professional image with a local number. — Remote Teams: Shared company credit, flexible billing, and the ability to reassign numbers between team members in one click. — Expats & Digital Nomads: Keep a local number in your home country while living abroad. Friends, family, and banks can reach you without international charges. — International Travellers: Connect over Wi-Fi and avoid expensive roaming fees. — International Callers: Stay in touch with friends and family overseas at affordable rates. — Coaches & Teachers: Communicate with students and clients on a dedicated number with flexible availability settings. — Property Managers & Hosts: A separate line for guest and client inquiries across multiple listings. — Tablet & Laptop Users: Turn any device into a fully functioning phone — no physical SIM required. MANAGE MULTIPLE NUMBERS Add more than one virtual number and manage them all from a single app. Each number comes with its own voicemail, availability schedule, and call controls. FEATURES — Personalized voicemail for each number — Call and SMS forwarding — Advanced availability controls and quiet hours — Block unwanted calls and messages — Send SMS to multiple contacts at once — Synchronized contacts across all your devices — Remote logout for account security — Login activity monitoring — Number porting — transfer an existing number to Call.com LOW INTERNATIONAL RATES Affordable calls and SMS to hundreds of destinations. Transparent pricing visible in the app before you call or send a message. USE ON MULTIPLE DEVICES Your calls, messages, and contacts stay synchronized across your devices. Trusted by over 1,000,000 users worldwide. Built in Europe. For support, contact our team directly in the app or email support@call.com

Precision Engineering on the go. RC Designer is an advanced mobile tool built specifically for structural engineers, consultants, and students working within the Hong Kong construction industry. Designed strictly according to the Code of Practice for Structural Use of Concrete 2013 (HK COP 2013), this app streamlines the complex process of reinforced concrete member design. Whether you are performing quick spot-checks on site or batch-processing an entire structural model, RC Designer brings desktop-level analytical power to your mobile device. WHAT'S NEW: ETABS Batch Integration: Seamlessly import ETABS analysis data (via Excel .xlsx) to instantly batch-check hundreds of beams and columns. Interactive 3D Viewer: Visualize your imported structural model directly on your device. Tap any member in 3D to instantly view its detailed design calculations. Professional PDF Reports: Generate comprehensive, step-by-step PDF calculation reports for individual members or export a complete batch summary with 3D model screenshots to share with your team. Manual Rebar Overrides: Edit rebar and shear link arrangements on the fly, and watch the Utilization Ratios (UR) and pass/fail statuses update instantly across your batch tables. COMPREHENSIVE BEAM DESIGN: Flexure Design: Supports both Singly and Doubly reinforced sections. Automatic Detailing: Intelligent rebar arrangement based on section width or manual override. Shear Links: Calculate required links (S.S, D.S, T.S, or Multi-leg) based on V/vc limits. Deflection Check: Real-time Span/Effective Depth ratio verification with precise modification factors. Detailed Traceability: View full calculation steps with direct references to specific HK COP 2013 Clauses. ADVANCED COLUMN DESIGN: Biaxial Bending: Interactive M-N Interaction Curves for both X and Y axes. Slenderness Effects: Automatic calculation of additional moments based on effective height. Visual Detailing: Dynamic, scaled cross-section sketches showing precise rebar and link layouts. Shape Support: Full support for both Rectangular and Circular columns. Multi-Load Case Support: Effortlessly handle and envelope multiple load cases from ETABS outputs to find the governing design. Disclaimer: This app is intended for use by qualified structural engineers for preliminary design and checking purposes. All final designs must be verified against official code documents and independent calculations.