Comparison

Source Viewer XL vs Calctronics

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

Head to head
About

Source Viewer XL

View the HTML, CSS, and JavaScript source code of any website. Highlighted syntax, extracted links, and image galleries make code analysis easy. Save images, bookmarks, and history for later.

Highlights
  • Syntax highlighting for HTML, CSS, and JavaScript
  • Extracts and follows embedded links
  • Lists and views all website images
  • Saves images to photo album
  • Bookmark and session history management
  • Copy/paste code functionality
Features
Read full description

Whether you are a web designer or just curious - this application is for you. Source Viewer shows the HTML, CSS and Javascript source code of any website. Features: - Tags, keywords and CSS attributes are highlighted with a different color. - It extracts the links which are embedded into HTML and CSS so that they can be followed easily. - It collects all images from the HTML and CSS which can be viewed separately in a list and full screen. - save images to the photo album - save bookmarks - session history list - toggle word wrap - copy and paste code to clipboard - open the URL in the browser and send it by email

About

Calctronics

This app provides a comprehensive suite of calculators and design tools for electronic engineering. It assists with circuit design, filter analysis, and component calculations for resistors, capacitors, and inductors. Ideal for both professionals and students, it simplifies complex electronic projects.

Highlights
  • Comprehensive calculator collection
  • Filter design with graph plotting
  • Resistor, transistor, capacitor design tools
  • Amplifier and inductor design
  • Circuit analysis and design
  • Offline functionality
Features
Read full description

Introducing the ultimate electronic engineering app! With its comprehensive collection of calculators and design tools, you'll be able to tackle any electronic project with ease. Our app features a filter design calculator that allows you to plot graphs, making it easier to visualize your calculations. Additionally, we've included resistor, transistor, capacitor, amplifier, and inductor design tools to help you tackle any electronic design problem. Whether you're a professional electronic engineer or just starting out, this app is the perfect tool to have in your arsenal. Download now and experience the power of electronic engineering in the palm of your hand! Here are some stuffs you can do with the app:- Circuit design Electrical calculations Filter design Resistor calculations Transistor design Capacitor design Amplifier design Inductor design Electrical engineering tools Electronic engineering calculator Circuit analysis --- The app contains the following calculators --- • Resistor Colour Code • Resistors in series and parallel • Capacitors in series and parallel • Capacitor charge • Resistor's Y to delta and delta to Y Converter • Resistor's Pi, Tee and bridge Tee attenuator • SMD Resistor Code • Capacitor Code includes polyester and ceramic capacitors • Ohm's Law • Transistor amplifier calculator • Filters Sallen-Key active filter, Butterworth, Chebyshev and Bessel filters • Voltage divider • Resistor Ratio • Skin depth • Decibel to Watt and Watt to decibel converter • Coaxial cable and 2 parallel wires impedance and capacitance calculator • Operational Amplifier eg inverting amplifier, Difference amplifier and Non inverting amplifier • LED series Resistor Calculator • Adjustable voltage regulator • 555 timer Calculator including Astable and monostable timer • Power dissipation • Micro strip trace width and impedance calculator • Inductor Design Tool • Cylinderical wave guide Calculator • Rectangular wave guide Calculator • PCB Trace Width Calculator • Series capacitor, inductor and resistor Resonance • Capacitive Reactance • Inductive Reactance • Power Calculator • Decibel Converter • Crossover calculator • Band pass and Band reject filter design Whether you're a professional engineer or a student learning about electronics, Electronics Calculator Pro is the perfect tool for your circuit design needs. With its comprehensive set of calculator tools and offline functionality, you'll have everything you need to design and analyze your circuits with confidence. Try it out today!

Screenshots

Calctronics4 screens

Verdict

The call

The clearest difference is price: Calctronics at Free against Source Viewer XL's $1.99. Calctronics also leads on update cadence (every 2 months vs every 28 months) and device support (3 vs 1). Source Viewer XL's advantage is review sentiment (57% vs 14%) and rating (4.7 vs 4.0). On ratings volume 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

Calctronics is free to download; Source Viewer XL costs $1.99 up front. Calctronics sells 1 one-off in-app purchase. Source Viewer XL asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Source Viewer XL holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 3 and 5 respectively. Written reviews point the same way: 57% of Source Viewer XL's written reviews are positive against 14% of Calctronics's.

UpkeepUpdate frequency

Source Viewer XL ships an update every 28 months, Calctronics every 2 months. Both last shipped on September 9, 2026.

Scorecard9 real differences · 1 level
Source Viewer XL versus Calctronics: the parameters behind the verdict, then further details
ParameterSource Viewer XLCalctronics
Price$1.99Free — better
Rating4.7 (3 ratings) — better4.0 (5 ratings)
Positive reviews57.1% of reviews — better14.3% of reviews
Number of ratings35 — better
Update frequencyEvery 28 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree — better
DevicesiPadiPhone, iPad, iPod — better
Requires iOS15.613.0 — better
Further details — not scored
Size1 MB35 MB
Age rating17+4+
DeveloperPiet JonasAnas Abubakar

Customer experience

Source Viewer XL

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive57.1%
Neutral14.3%
Negative28.6%

Calctronics

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews7 reviews
Positive14.3%
Neutral14.3%
Negative71.4%

In-app purchases

None

Source Viewer XL

No in-app purchases

1 purchases

Calctronics

One-time1
  • Upgrade to the Pro version$2.99

Questions

Is Source Viewer XL free?
Source Viewer XL costs $1.99, with no in-app purchases.
Is Calctronics free?
Calctronics is free to download, with in-app purchases available.
Which has better reviews, Source Viewer XL or Calctronics?
Source Viewer XL is rated higher. Source Viewer XL averages 4.7 out of 5 from 3 ratings, while Calctronics averages 4.0 from 5 ratings.
Do Source Viewer XL or Calctronics have ads?
Calctronics shows ads; Source Viewer XL does not.
Which is updated more often, Source Viewer XL or Calctronics?
Source Viewer XL ships an update every 28 months, and Calctronics every 2 months. Most recently, Source Viewer XL was updated on September 9, 2026 and Calctronics on September 9, 2026.

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