Electronic Circuits Calc Pro vs Bus Connection
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Electronic Circuits Calc Pro
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Electronic Circuits Calc Pro is your ultimate electronics toolkit — featuring over 130 calculators, circuit tools, and guides for beginners and professionals alike. Perfect for electronics enthusiasts, students, hobbyists, and engineers alike, Electronic Circuits Calculator Pro is a powerful reference tool covering essential electronics concepts, components, and circuit design. Whether you're just getting started or need a quick calculation on the go, this app has you covered. Key Features: • Interactive calculators for circuits • Step-by-step explanations and formulas • Ideal for learning, prototyping, or quick checks • Full-text search for instant access to any topic • Designed for both light & dark modes 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! Categories Included: Basic calculators • Ohm's Law • Power, voltage and current • Resistive voltage divider • Wheatstone Bridge • RC circuit time constant • Battery Life • Additional resistor for voltmeter • Shunt resistor for ammeter Resistors • Resistor color codes • SMD resistor codes • EIA-96 Encoding • Standard values finder for resistor • Series resistors • Parallel resistors • E series Capacitors • Ceramic disc capacitors codes • Film capacitors codes • Capacitor working voltage codes • Film capacitors colour codes • SMD Tantalum electrolytic capacitors codes • Series capacitors • Parallel capacitors Inductors • Inductor color codes • SMD inductors codes • Series inductors Diodes • Diodes • Rectifier diodes • Signal diodes • Schottky diode • Tunnel diode • Varicap • Zener diode Transistors • Bipolar transistors • Metal-Oxide-Semiconductor Field-Effect Transistor • Junction Field-Effect Transistor • Unijunction transistor • Insulated gate bipolar transistor • Darlington transistor pair Thyristors • Thyristors • Gate Turn-Off Thyristor • TRIAC • DIAC • IGCT thyristor • MOS-Controlled Thyristor • Programmable unijunction transistor PowerSupplies • AC parameters and rectified value • Half-wave rectifier • Full-wave rectifier • Bridge rectifier • Capacitive power supply • Power source internal resistance • Symmetrical voltage doubling rectifier circuit • Three-Phase Half-Wave Rectifier • Three-phase bridge rectifier • Voltage multiplier Voltage and current regulators • LM317 Voltage regulator calculator • Bipolar voltage regulator for LM317 and LM337 • LM317 Current Source calculator • Zener reference voltage source • Thermally compensated voltage reference • Calculation of the stabilizer on TL431 • The TL431 stabilizer with additional transistor LED • Introduction of LEDs • LED Single Resistor calculator • LED Series Resistor calculator • LED Parallel Resistor calculator • 7-segment LED display • Decoder (driver) for 7-segment displays CD4511 Photocells • Photodiode • Photoresistor • Phototransistor • Optocoupler OP • Non-Inverting OP Amplifer Gain calculator • Inverting OP Amplifier Gain calculator • Inverting amplifier with T-bridge in feedback • Inverting summing OP Amplifier • Differential OP amplifier • OP Voltage integrator • OP Voltage Differentiator • OP Voltage comparator Frequency • Capacitor reactance • Reactance of an inductance coil • Gain conversion to decibels • dBm to Watts conversion • T-Attenuator • Pi-Attenuator • L-Attenuator • Bridged T-Attenuator • Capacitive AC Voltage Divider • Inductive Voltage Divider • Frequency and wavelengths Filters • RC Pass Filter • RC Band pass filter • RL filter • LC Pass Filter Timers • Astable multivibrator • Monostable (waiting) multivibrator • Bistable multivibrator • Multivibrator with additional diodes • NE555 Astable Multivibrator • NE555 Monostable Multivibrator Logic gates: - AND. OR, NOT, NAND, NOR, XOR, XNOR The application is being actively developed and supplemented with new calculators. Keep for updates!
Bus Connection
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La aplicación proporciona información tanto histórica como en tiempo real sobre los vehículos registrados bajo su cuenta. Accesible desde teléfonos inteligentes o tabletas, este servicio requiere un nombre de usuario y una contraseña para iniciar sesión. Las funciones incluyen: ● Actualizaciones en tiempo real sobre la actividad del vehículo ● Alertas del vehículo ● Recuperación de códigos de error del vehículo ● Filtros basados en requisitos específicos (por ejemplo, vehículos con fallas, vehículos en tránsito, etc.) ● Visualización de vehículos en un mapa o en imágenes satelitales ● Acceso a la información del conductor para cada vehículo asignado ● Visualización de la velocidad, ubicación y dirección del vehículo ● Una lista completa de todos los vehículos y su estado ● Opciones de contacto para obtener explicaciones adicionales y soluciones a problemas ● Recuperación de códigos de error del vehículo ● Filtros basados en requisitos específicos (por ejemplo, vehículos con fallas, vehículos en tránsito, etc.)
Screenshots
Verdict
The clearest difference is price: Bus Connection at Free against Electronic Circuits Calc Pro's $4.99. Bus Connection also leads on iOS requirement (13.0 vs 16.0). Electronic Circuits Calc Pro's advantage is update cadence (every 6 weeks vs every 4 months) and chart position (#193 vs unranked). On 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
Bus Connection is free to download; Electronic Circuits Calc Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Electronic Circuits Calc Pro ships an update every 6 weeks, Bus Connection every 4 months. The most recent releases landed on September 16, 2026 and September 13, 2026 respectively.
| Parameter | Electronic Circuits Calc Pro | Bus Connection |
|---|---|---|
| Price | $4.99 | Free — better |
| Update frequency | Every 6 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Best chart rank | #193 — better | — |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 19 MB | 32 MB |
| Age rating | 4+ | 17+ |
| Developer | ALG Software Lab | QUESTAR AUTO TECHNOLOGIES LTD |
In-app purchases
Electronic Circuits Calc Pro
No in-app purchases
Bus Connection
No in-app purchases
Questions
Is Electronic Circuits Calc Pro free?
Is Bus Connection free?
Do Electronic Circuits Calc Pro or Bus Connection have ads?
Which is updated more often, Electronic Circuits Calc Pro or Bus Connection?
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