Comparison

Series Parallel Circuit Solver vs Quad Calcs

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

Head to head
About

Series Parallel Circuit Solver

Calculate resistors, capacitors, and inductors in series and parallel circuits. This tool simplifies complex electrical circuit analysis for professionals and students, providing instant, accurate results for various configurations.

Highlights
  • Series and parallel calculations
  • Resistor, capacitor, and inductor calculation
  • Mixed circuit solver
  • User-friendly interface
  • Instant results
  • Circuit analysis
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Series Parallel Circuit Solver is the easy way to build any series, parallel or mixed circuit and get the answer instantly. Draw your circuit by tapping, see the equivalent resistance, capacitance or inductance live, and follow every step of the solution. A complete series parallel calculator, parallel resistor calculator and resistor color code tool for students, hobbyists and technicians. BUILD ANY CIRCUIT BY TAPPING • Add resistors, capacitors or inductors in series or in parallel with one tap • Group parts to make mixed series-parallel circuits of any size • Copy, delete, undo and redo, and zoom in on big circuits • The answer updates live while you build • Choose the zigzag (US) or box (IEC) resistor symbol DC AND AC CIRCUITS • DC: solve resistors, capacitors or inductors in series and parallel • AC: mix R, L and C in one circuit at any frequency • Impedance in polar and rectangular form, with the phase angle • A true RLC impedance calculator for AC homework VOLTAGE, CURRENT AND POWER OF EVERY PART • Add a voltage or current source to your circuit • Get a clear results table: voltage, current and power for each resistor • In AC circuits, also see real, reactive and apparent power and the power factor (leading or lagging) • Show the voltages right on the circuit drawing STEP-BY-STEP SOLUTION • See how the circuit is solved, one step at a time • Every step shows the formula and the numbers used • Perfect for homework, lab reports and exam practice • Learn how equivalent resistance is really found, not just the final number READY-MADE TEMPLATES Start fast with a series chain, parallel bank, mixed circuit, ladder, two banks, lab circuit, capacitor bank or speaker crossover. QUICK SERIES & PARALLEL CALCULATOR • Type values on a circuit keypad, for example 10k ‖ 10k + 4.7k • Works for resistors, capacitors and inductors • Live total, drawing and steps as you type • The fastest parallel resistor calculator for quick checks RESISTOR COLOR CODE CALCULATOR • Bands to value: 3, 4, 5 and 6 band resistors, with tolerance and temperature coefficient • Value to bands: enter any value and see its color bands • Nearest standard value from E6 to E192 RESISTOR COMBINATION FINDER • Need a value you don't have? Make it from standard resistors • Uses 1 or 2 resistors in series or parallel (E6 to E96) • Best match first, with error % and tolerance range • Exclude values you don't have in your drawer • Send any result to the circuit builder in one tap SHARE AND SAVE • Export your circuit drawing and results table as an image • Share it or save it to Photos for assignments and notes • All your exported files stay in "My files": open, share, save, rename or delete HISTORY AND SAVED CIRCUITS • Every circuit is kept in History with the date • Save circuits with a name, then rename, duplicate or delete them • Search your circuits by name MADE THE WAY YOU LIKE • Light, dark or system theme • Choose 3 to 6 digits in answers • Engineering prefixes on or off (3.20 kΩ or 3197 Ω) • Pick your default E-series WORKS OFFLINE No internet needed, nothing to sign up for, no account. Your circuits stay on your phone. WHO IS IT FOR • Physics and electrical engineering students in school, college and university • Electronics hobbyists, makers and repair technicians • Teachers who want clear, step-by-step circuit examples Whether you need a simple series resistance calculator, a parallel resistance calculator, a resistor calculator with color code, a capacitor calculator, an inductor calculator or a full circuit solver for mixed series-parallel circuits, Series Parallel Circuit Solver gives you the right answer and shows you how it was found. Download now and solve your next circuit in seconds.

About

Quad Calcs

Features
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Display four calculators and perform calculations with each one.

Screenshots

Series Parallel Circuit Solver4 screens
Quad Calcs1 screens

Verdict

The call

The clearest difference is update cadence: Quad Calcs at every 2 weeks against Series Parallel Circuit Solver's every 24 months. On price, ads, in-app purchases 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Series Parallel Circuit Solver ships an update every 24 months, Quad Calcs every 2 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard1 real difference · 8 level
Series Parallel Circuit Solver versus Quad Calcs: the parameters behind the verdict, then further details
ParameterSeries Parallel Circuit SolverQuad Calcs
PriceFreeFree
Rating4.5 (4 ratings) — better—
Number of ratings4 — better—
Update frequencyEvery 24 monthsEvery 2 weeks — better
AdsYesYes
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.5 — better15.8.3
Further details — not scored
Size35 MB36 MB
Age rating4+4+
DeveloperMuhammad Awais YounasHideaki Uchikoshi

In-app purchases

None

Series Parallel Circuit Solver

No in-app purchases

None

Quad Calcs

No in-app purchases

Questions

Is Series Parallel Circuit Solver free?
Series Parallel Circuit Solver is free to download, with no in-app purchases.
Is Quad Calcs free?
Quad Calcs is free to download, with no in-app purchases.
Do Series Parallel Circuit Solver or Quad Calcs have ads?
Both Series Parallel Circuit Solver and Quad Calcs show ads.
Which is updated more often, Series Parallel Circuit Solver or Quad Calcs?
Series Parallel Circuit Solver ships an update every 24 months, and Quad Calcs every 2 weeks. Most recently, Series Parallel Circuit Solver was updated on October 24, 2026 and Quad Calcs on October 25, 2026.

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