Comparison

Simple Hex Calc vs Antenna+

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

Head to head
About

Simple Hex Calc

This utility app provides IT programmers with a pocket calculator for performing arithmetic and logical operations on numbers in various bases. It offers extensive configuration options for bit length, signed/unsigned modes, and data display formats, with a reference manual included.

Highlights
  • Arithmetic and logical operations
  • Multiple number base support (2/8/10/16)
  • Bit shift, rotate, set, clear, and order operations
  • Memory operations (save, load, swap)
  • Configurable bit length and signed/unsigned modes
  • Cut, copy, and paste results
  • Reference manual included
Features
Read full description

Simple Hex Calc is a simple pocket calculator for IT programmers. Features: * Arithmetic operations. (add, subtract, multiply, divide, modulo) * Logical operations. (not, and, or, xor, '+', '-') * Logical operations. (bit shift/rotate, bit set/clear, flip bit/byte order) * Memory operations. (clear, save, load, swap) * Switch the base 2/8/10/16 number on input. * Switch simple and extended mode by rotating device. * Switch simple and extended mode by swiping the left and right edge of screen. * Calculate the order entered. (2+2*2=8) * Cut, copy or paste the result by a tap. * Configure bit length option. (select 1 - 64 bit) * Configure signed/unsigned option. * Configure to display data format on/off option. * Configure to display data in previous base on/off option. * Configure grouping separator for BIN, OCT and HEX mode. * Configure tap sound on/off option. * Reference manual included. * Integer only. :-)

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
Read full description

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

Simple Hex Calc3 screens
Antenna+4 screens

Verdict

The call

The clearest difference is price: Antenna+ at Free against Simple Hex Calc's $0.99. Antenna+ also leads on rating (5.0 vs 4.5) and update cadence (every 5 weeks vs every 5 months). Simple Hex Calc's advantage is in-app purchases (none vs 2) and review sentiment (94% vs 60%). On ads, monetization model and device support 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; Simple Hex Calc costs $0.99 up front. Antenna+ sells 2 in-app purchases, starting at $1.99 per month. Simple Hex Calc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Antenna+ holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Simple Hex Calc has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 94% of Simple Hex Calc's written reviews are positive against 60% of Antenna+'s, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Simple Hex Calc ships an update every 5 months, Antenna+ every 5 weeks. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.

Scorecard7 real differences · 3 level
Simple Hex Calc versus Antenna+: the parameters behind the verdict, then further details
ParameterSimple Hex CalcAntenna+
Price$0.99Free — better
Rating4.5 (8 ratings)5.0 (1 ratings) — better
Positive reviews94.4% of reviews — better60.0% of reviews
Number of ratings8 — better1
Update frequencyEvery 5 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS27.017.6 — better
Further details — not scored
Size1 MB11 MB
Age rating4++4
DeveloperHiroki IshiuraVerosocial Studio

Customer experience

Simple Hex Calc

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews36 reviews
Positive94.4%
Neutral2.8%
Negative2.8%

Antenna+

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

In-app purchases

None

Simple Hex Calc

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 Simple Hex Calc free?
Simple Hex Calc costs $0.99, with no in-app purchases.
Is Antenna+ free?
Antenna+ is free to download, with in-app purchases available.
Which has better reviews, Simple Hex Calc or Antenna+?
Antenna+ is rated higher. Simple Hex Calc averages 4.5 out of 5 from 8 ratings, while Antenna+ averages 5.0 from 1 ratings.
Do Simple Hex Calc or Antenna+ have ads?
Neither Simple Hex Calc nor Antenna+ shows ads.
Which is updated more often, Simple Hex Calc or Antenna+?
Simple Hex Calc ships an update every 5 months, and Antenna+ every 5 weeks. Most recently, Simple Hex Calc was updated on October 31, 2026 and Antenna+ on November 1, 2026.

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