Comparison

Electrical Parallel Calculator vs 555 Timer & Oscillators Guide

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

Head to head
About

Electrical Parallel Calculator

This app provides three specialized calculators for parallel electrical circuits: resistance, inductance, and capacitance. It allows for easy input of values, unit customization, and delivers instant, accurate results for engineers and students.

Highlights
  • Parallel resistance calculation
  • Parallel inductance calculation
  • Parallel capacitance calculation
  • Customizable units (Ohm, KiloOhm, Farad, etc.)
  • Instant and accurate results
  • iPad and iPhone compatible
Features
Read full description

Simplify Parallel Circuit Calculations! Our app offers 3 powerful Electrical Parallel Calculators: Resistance Parallel Inductance Parallel Capacitance Parallel Key Features: Effortless input: Enter your resistance, inductance, or capacitance values with ease. Customizable Units: Resistance: Choose between Ohm and KiloOhm. Capacitance: Select from Farad, milli-Farad, micro-Farad, nano-Farad, or pico-Farad. Instant Results: Get accurate calculations for your parallel circuit outputs in your preferred units. This app is a must-have for Electrical Engineers, Engineering Students, and anyone working with parallel circuits. Compatible Devices: Works seamlessly on both iPads and iPhones. Download now and make your circuit calculations quicker and smarter!

About

555 Timer & Oscillators Guide

Features
Read full description

Master the design of oscillators and waveform generators using 555 timer integrated circuits, digital logic integrated circuits, operational amplifiers, and transistors. The application provides a comprehensive collection of over 130 tutorials and circuit diagrams, covering 555 timer circuits and practical applications, CMOS 4000 series logic oscillators, TTL 74LS and 74HC series oscillators, operational amplifier–based waveform generators, and transistor multivibrators. Designed for electronics beginners, students, hobbyists, and professional engineers, the app serves as a complete reference and learning tool for designing, understanding, and building oscillators, multivibrators, pulse generators, and waveform circuits commonly used in both analog and digital electronics. In addition to tutorials and schematics, the app includes built-in calculators for frequency, timing, duty cycle, and component value estimation, helping users quickly calculate and adjust circuit parameters. All topics are presented with clear circuit diagrams and detailed explanations. Available in 14 Languages: • English, French, German, Indonesian, Italian, Japanese, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Turkish, Ukrainian, and Vietnamese — study in your native language! Covered Topics: • 555 Timer IC Series • Astable, monostable, and bistable modes • Pulse Width Modulation (PWM) • Voltage conversion circuits • Sensor and external module interfacing • CMOS Logic Oscillators • CMOS 4000 series circuits • Astable, monostable, and bistable modes • Gated CMOS oscillators • TTL / HC Logic Oscillators • TTL 74LS series circuits • 74HC series logic oscillators • Astable and monostable modes • Operational Amplifier Oscillators • Sine wave generators • Square-wave pulse generators • Triangle wave generators • Transistor-Based Oscillators • Transistor-Based Astable multivibrators • Transistor-Based Monostable multivibrators The content is regularly updated and expanded with each new release, ensuring the latest tutorials and circuit examples are always available.

Screenshots

Electrical Parallel Calculator4 screens
555 Timer & Oscillators Guide4 screens

Verdict

The call

Electrical Parallel Calculator and 555 Timer & Oscillators Guide are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Electrical Parallel Calculator ships an update every 8 months, 555 Timer & Oscillators Guide every 5 months. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

ScorecardNo meaningful differences
Electrical Parallel Calculator versus 555 Timer & Oscillators Guide: the parameters behind the verdict, then further details
ParameterElectrical Parallel Calculator555 Timer & Oscillators Guide
PriceFreeFree
Rating4.7 (33 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings33 — better—
Update frequencyEvery 8 monthsEvery 5 months — better
AdsYesYes
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.616.0 — better
Further details — not scored
Size8 MB24 MB
Age rating4+4+
DeveloperV PUGAZHENTHIALG Software Lab

In-app purchases

None

Electrical Parallel Calculator

No in-app purchases

None

555 Timer & Oscillators Guide

No in-app purchases

Questions

Is Electrical Parallel Calculator free?
Electrical Parallel Calculator is free to download, with no in-app purchases.
Is 555 Timer & Oscillators Guide free?
555 Timer & Oscillators Guide is free to download, with no in-app purchases.
Do Electrical Parallel Calculator or 555 Timer & Oscillators Guide have ads?
Both Electrical Parallel Calculator and 555 Timer & Oscillators Guide show ads.
Which is updated more often, Electrical Parallel Calculator or 555 Timer & Oscillators Guide?
Electrical Parallel Calculator ships an update every 8 months, and 555 Timer & Oscillators Guide every 5 months. Most recently, Electrical Parallel Calculator was updated on October 7, 2026 and 555 Timer & Oscillators Guide on October 12, 2026.

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