Comparison

K3iNetwork vs Antenna+

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

K3iNetwork

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K3iNetwork provides remote control of the Elecraft K3, K3S, KX3 or KX2 radios via a WiFi network and PC or Mac connected to the radio serial port. The user can control many functions of the K3, K3S, KX3 or KX2 radio using their iPhone. CW, RTTY and PSK31 QSOs are possible. The user can watch text from the radio VFO B window stream to their iPhone in the Terminal window, and send CW, RTTY, or PSK, as appropriate, in response. K3iNetwork has windows patterned after the Command Tester and Terminal windows of the Elecraft K3 Utility program. It provides similar functionality, and it can all be accomplished remotely using the iPhone. Once the user establishes communication with the K3, K3S, KX3 or KX2 via a WiFi network the iPhone is used to control the radio.

About

Antenna+

This toolkit offers amateur radio operators and RF hobbyists essential formulas and instant results for antenna design, feedline loss, and signal utilities. It includes calculators for antenna length, frequency conversion, VSWR, and propagation planning, along with DTMF and Morse code tools.

Highlights
  • Antenna length calculators
  • Frequency-to-wavelength conversion
  • VSWR and ERP calculators
  • Horizon visibility and solar calculators
  • DTMF decoding/keying
  • Morse/PSK31 tools
Features
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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/

Screenshots

K3iNetwork4 screens
Antenna+4 screens

Verdict

The call

The clearest difference is price: Antenna+ at Free against K3iNetwork's $3.99. Antenna+ also leads on update cadence (every 5 weeks vs every 7 months). K3iNetwork's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Antenna+ is free to download; K3iNetwork costs $3.99 up front. Antenna+ sells 2 in-app purchases, starting at $1.99 per month. K3iNetwork asks for nothing beyond the download.

UpkeepUpdate frequency

K3iNetwork ships an update every 7 months, Antenna+ every 5 weeks. Both last shipped on November 1, 2026.

Scorecard3 real differences · 7 level
K3iNetwork versus Antenna+: the parameters behind the verdict, then further details
ParameterK3iNetworkAntenna+
Price$3.99Free — better
Rating—5.0 (1 ratings) — better
Positive reviews—60.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 7 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Paid
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS17.2 — better17.6
Further details — not scored
Size23 MB11 MB
Age rating4++4
DeveloperMike Downs, ks7dVerosocial Studio

In-app purchases

None

K3iNetwork

No in-app purchases

2 purchases

Antenna+

Subscriptions1
  • Monthly All Access Pro Usage$1.991 Month
One-time1
  • Antenna Pro lifetime Upgrade$14.99

Questions

Is K3iNetwork free?
K3iNetwork costs $3.99, with no in-app purchases.
Is Antenna+ free?
Antenna+ is free to download, with in-app purchases available.
Do K3iNetwork or Antenna+ have ads?
Neither K3iNetwork nor Antenna+ shows ads.
Which is updated more often, K3iNetwork or Antenna+?
K3iNetwork ships an update every 7 months, and Antenna+ every 5 weeks. Most recently, K3iNetwork was updated on November 1, 2026 and Antenna+ on November 1, 2026.

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