Antenna+ vs DA20 M&B

Your care and curiosity make every radio project better. Thank you for using Antenna+. From your first dipole to your next Morse practice session, keep useful antenna calculators, RF tools and saved results close on iPhone, iPad and Apple Watch. PLAN YOUR ANTENNA - Size a 5/8 wave vertical for your operating frequency. - Find half-wave dipole lengths and the length of each leg. - Compare dipole and inverted vee dimensions. - Work out ground plane radiators and radials. - Calculate cubical quad loops, double bazooka antennas and extended Zepp dimensions. - Convert frequency to full and fractional wavelengths. - Choose metric or imperial length units. - Read the formulas and assumptions in Help. CHECK YOUR RF NUMBERS - Convert watts, milliwatts, dBW and dBm. - Calculate ERP and EIRP from power and antenna gain. - Include feed line and connector loss in EIRP estimates. - Explore VSWR, mismatch loss and reflected power. - Estimate geometric and radio horizon distances. - Look up sunrise, sunset, solar noon and twilight for a chosen place, date and time zone. - Save the inputs alongside each calculated result. PRACTICE MORSE AND TONES - Turn text into Morse code and audible practice tones. - Use a straight key or enter individual dots and dashes. - Adjust Morse speed and sidetone settings. - Decode Morse and DTMF audio through the microphone. - Microphone listening starts only when you choose Receive or Start Listening. - Play standard DTMF keypad tones and sequences. - Exchange acoustic text with nearby devices using their speakers and microphones. - Replay the latest sent chat message from its bubble. - Stop a transmission when you need to cancel. - Search Q codes and add them to a message draft. KEEP YOUR WORK ORGANIZED - Give saved calculations and signal records a title and notes. - Mark favorites, filter by date and search by tool or content. - Review original inputs and results without recalculating. - Read all your saved results without spending another use. - Scroll through your records with automatic loading. - Explore charts and summaries of your saved calculations. - Back up and restore records with JSON import and export. - Skip matching records during import. - Export records to CSV for a spreadsheet. - Process up to 10,000 records per transfer, with a 100 MB JSON archive limit. TAKE IT TO APPLE WATCH - Use all 14 calculators without a usage limit or Pro purchase. - Calculate on your watch without the iPhone app or a phone connection. - Keep the watch screen clear with short text labels. - Find Save, Share and Help at the bottom of calculator pages. - Save calculations locally on your watch and reopen them in Saved. - Share full calculation details using the watch's available sharing options. - Practice Morse with Key, Dot, Dash, Play and Stop. - Get haptic feedback and sound when audio is available. - Keep watch records separate from the records on your phone. FIND WHAT YOU NEED - Keep favorite chats, signal tools and calculators within easy reach. - Use the iPad's list and detail layout to browse while viewing a tool. - Open ham radio and antenna references in the app's browser. - Bookmark useful web pages for another visit. - Choose System, Light or Dark appearance on iPhone and iPad. - Restore your previous Pro purchases from inside the app. Use calculated antenna dimensions as a starting point, then tune for your installation. Acoustic chat uses sound between nearby devices. iPhone and iPad include a one-time allowance of 50 uses per device. Continue with monthly or annual auto-renewing Pro, or a one-time Lifetime Pro purchase. Apple Watch calculators and Morse remain unlimited without Pro. Web references require an internet connection. For monthly subscriptions: Monthly Pro is a 1-month auto-renewable subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Diamond Mass & Balance calculation App with easy and interactive weights adding and real time Chart plotting. You can calculate for DA20 models: DA20-A1, DA20-100, DV20-100, DA20-C1, DA20 i and DV20 E. Check out the CG moving while you're selecting your Weights. Get access to Loading Charts for accurate reading. Red Dot "marks the Spot". Also Red warning alerts if you're overweight! Create your PDF file with your loadsheet in a professional looking sheet. Write your remarks in it, save it, print it, share it or e-mail it! Includes regulatory data such as A/C registration, departure aerodrome, arrival aerodrome, time and date. Convert all necessary weight and fuel Units on a dedicated page. You can retain data from A/C's Registration, BEW and Arm, Pilot's weight and arm so that you don't have to insert it every time you restart your App, if the A/C and pilot are the same as the last flight. Enjoy your Mass and Balance on your iPad or your iPhone! Available for Diamond Aircrafts. Also available for Cessna and Piper aircrafts.