QRV vs Ham Engineering

QRV (I am ready) is your essential ham radio multitool built for DX success and maximum operating efficiency. Stop juggling apps! QRV aggregates critical tools and reliable, fast-updated data into one single, clean platform. Available on iPhone, iPad, Mac, and Apple Watch. --- QRV is designed to get you the information you need quickly, whether you are in the field or at the shack: - Real-time Band Conditions: Access live propagation data from HamQSL to find the optimal frequency. - Universal Search: Look up a callsign, jump to a DXCC entity by name or prefix, or check your band plan for a frequency — all from one place. - Cross-Device Sync: Favorites, frequency memories, settings and alerts follow you — through iCloud, or with a free sign-in wherever you use QRV. - My Frequencies: Save important frequencies (weekly nets, calling channels, and more) with name, mode, and notes. - Comprehensive Call Sign Lookup: Search easily via QRZ and/or HamQTH. - QRZ QSO Confirmation: See at a glance which bands you've worked a station on, across every QRZ logbook you own. - DXpedition Calendar: Track active and upcoming DXpeditions worldwide — see local spots and worldwide on-air activity side by side. - POTA Spots: Browse live Parks on the Air activations with band, mode, and search filters. - Band Plans: Detailed frequency allocations for 22 countries across North America, Europe, Africa, and Oceania — available in English and a native language - Glanceable data on the Apple Watch. See spots, the top bands, POTA stats, and solar conditions on your wrist. - Built-in Calculators: Antenna lengths (dipole, Slim Jim, J-Pole), coax & feedline loss, battery runtime, and power calculations. - Beginner-Friendly Reference: Q-codes, CW (Morse code) with audio, Prosigns, RST, APRS commands, Maidenhead grids, and more. - Full VoiceOver support and colorblind-friendly design. Note: Full QRZ data requires an XML and/or API subscription. Note: The Apple Watch app requires watchOS 11 (Apple Watch Series 6 or later, SE 2nd generation, or Ultra). Earlier watches aren't supported. --- PREMIUM FEATURES - Live Spots: Get reliable, high-speed spot delivery from PSK Reporter. - Rover Mode: Temporarily view live spots and band activity for any grid square without moving — widgets, Apple Watch, and alerts all follow the grid you choose, then revert automatically. - Lightning Proximity Alerts: Get warned when lightning is detected near your station so you can disconnect in time — fixed location or GPS-following, with an adjustable radius. - Customized Notifications: Set alerts for bands, DXCCs, DXpeditions, and individual callsigns with configurable thresholds. - Home Screen Widgets: Check band conditions at a glance without opening the app. - DXpedition Alerts: Get notified when your tracked DXpeditions are spotted. - Callsign Alerts: Get notified when a specific callsign is spotted from your location. - Logbook-Aware Alerts: DXCC and Callsign alerts auto-manage based on your QSO/QSL history from Wavelog or QRZ Logbook. Why Premium? These features require robust infrastructure: - I run dedicated servers to aggregate PSK Reporter data, process notifications, serve band conditions, and provide DXpedition info. - This delivers faster, more reliable data than direct API polling while being a good steward to upstream services like N1DQ's PSK Reporter. - Premium subscriptions help cover ongoing server and infrastructure costs. Your subscription is shared between all versions of the app. --- Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Ham Engineering is the engineering bench for amateur radio — antenna and feedline maths, circuit design, propagation and a deep reference library, all completely offline. No account, no ads, no tracking, and not a single network call. ANTENNAS • Half-wave dipole with adjustable k (velocity) factor, quarter-wave and 5/8-wave verticals, ground-plane radials, end-fed half-wave, random wire, full-wave loop and a 3-element Yagi estimator • Matching: L-network, Pi-network, quarter-wave transformer, balun/unun ratios and stub matching • Antenna Lab — a live elevation radiation-pattern plot with directivity, realized gain, takeoff angle, beamwidth, front-to-back, mismatch loss, feedline loss and system gain, each explained • Grid Compass that rotates with your phone, showing beam bearing and distance from your grid to a target grid • Antenna gallery — every common type drawn as scalable vector art, with what it is, what it is for and what to watch out for FEEDLINES & RF • Coax loss by cable type, frequency and run length; velocity-factor electrical length • SWR from forward/reflected power, plus return loss and mismatch loss • Antenna A/B comparison and receiver noise-floor estimation • RF power conversions: dBm, watts, ERP and EIRP • Propagation: free-space path loss, radio horizon and Fresnel-zone clearance • NanoVNA and tinySA quick-start guides, and a coax + connector gallery CIRCUITS • Ohm's law, series/parallel resistance, voltage dividers, RC and RL time constants • Reactance, LC resonance, Q and bandwidth, stored energy • RC and LC filter cutoffs, a constant-k Pi/T filter designer, a bandpass/notch calculator and a Butterworth low-pass designer • Resistor, capacitor and inductor code decoders, an AWG wire table and a 555 timer calculator • A live RLC resonance lab and a 50-part component gallery REFERENCE & EXTRA • Filterable amateur band plan for ITU Regions 1, 2 and 3 • Unit converters including watts, dBm and microvolts • Comparison tables for coax, connectors, antennas and batteries • Tools-and-gear and rig-controls galleries — what every knob and button is called across manufacturers • Maidenhead grid tools and great-circle beam headings • 300+ searchable tips, 40+ formulas, a rich glossary and a constants reference • Curated external links to major retailers, brands and references BUILT FOR THE BENCH • Nearly 200 illustrations drawn as scalable vector art — nothing to download, everything sharp at any size • Works fully offline. The app makes no network calls at all • Export any panel or diagram as a theme-aware image to share or file • An (i) explanation on every panel — this is a tool and a guide, not a quiz • Light and dark themes, adjustable font size, weekly tips and in-app version history • Your callsign, grid and email stay on your device and are never transmitted PERFECT FOR • Licensed operators designing, building and tuning antennas • Anyone putting up a first dipole or vertical and wanting the numbers right • Homebrewers and kit builders working with filters, matching and components • SWLs and newcomers who want the reference material without the exam drill • Club elmers and anyone teaching antenna and RF fundamentals PRIVACY • Your callsign, grid and email are stored only on your device. • No account, no sign-up, no ads, no analytics SDKs, no advertising ID and no tracking of any kind. 73 de A41UX Yousuf AL Balushi — Unixeer, Oman