Electronics Engineer Helper vs Photovoltaic Calculations
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Electronics Engineer Helper
This app provides a comprehensive suite of calculators and reference tools for electronics enthusiasts and professionals. It includes features for component identification, circuit calculations, and electrical property analysis, aiding in both study and practical work.
- Datasheet search
- Resistor color code calculator
- Electronic schematic symbols
- Pinouts guide
- Ohm's law calculator
- AWG converter
- Unit converter
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Digital toolbox for electronics engineers and electricians. Calculators and references for beginners and professionals — for work, study, DIY, and repair. Used by over 100,000 users. Completely ad-free. Included tools: • Datasheet search • Equivalent parts search (cross reference for transistors, diodes and ICs) • Resistor color and digit marking (4, 5 and 6 band color code; 2 symbols, 3/4 digit and EIA-96 code SMD resistors code) • Electronic schematic symbols (IEC 60617, IEEE 315 and GOST standards) • Pinouts of connectors and interfaces (USB, HDMI, DisplayPort, DVI, VGA, Thunderbolt, Apple Lightning and 30-pin, SATA, PCI Express and M.2, Ethernet RJ45 with PoE, RJ11/RJ14/RJ25, RS-232/422/485, IEEE 1394 FireWire, ATX, computer fans, SD card, audio jack, RCA, MIDI, XLR, PS/2, D-sub, SMEMA) • Pinouts of boards and microcontrollers (Raspberry Pi and Pico, Arduino, ESP32, ESP8266, STM32 Nucleo, Teensy, Orange Pi, RADXA Rock Pi, LubanCat, Flipper Zero, ATmega and ATtiny) • Ohm's law calculator • AWG converter (wire diameter, cross-section area, resistance and maximum current) • Resistor for LED • Voltage divider • Wheatstone bridge (output voltage or unknown resistance, current and power of every arm) • Capacitor code • Capacitor markings • Capacitor ESR tables • Frequency response curve calculation of passive filters (RC, RL, RLC, LC) • Inductor color code • Air-core coil calculator (inductance or number of turns of a single-layer solenoid) • Ideal transformer (winding turns, voltages and currents) • Linear current regulator • SMD packages list • Reactance • PCB trace resistance • Active, apparent and reactive power • RMS converter (peak, RMS and peak-to-peak values for seven waveform shapes) • 555 waveform generator • Operational amplifiers • RLC circuit • Number conversion • Unit converter • Cable voltage drop • Battery life (runtime of a battery pack, with discharge curve) • NTC thermistor resistance • Logic gates • RC circuit • Decibels calculator • 25-pair cable color code • Fuse color marking Additionally, by purchasing the PRO version of the app, you will get access to additional tools: • SMD components marking codes • Diodes color code (Pro Electron, JEDEC and JIS-C-7012 standards) • Linear voltage regulator • Resistor value to color or SMD code marking converter • Voltage rectifier • Series or parallel electrical components' connection calculator • Diode voltage drop • Minimum PCB trace width • Analog to digital conversion • Attenuators • 4-20 mA signal converter • Thermocouple calculator • Resistance thermometer • Buck switching voltage regulator • Wire resistance • Zener diode regulator (Zener diode and series resistor selection from a catalogue of 438 parts) • Load cell (bridge output voltage to weight, force, pressure or torque) • BJT voltage divider biasing • Transformer turns per volt (from core area, flux density and frequency) • Junction temperature (with or without a heatsink, power derating curve) • Solar string dimensioning (minimum voltage and current ratings for a PV array) • Solar cable and fuse selection (NEC and IEC rules) • 555 astable generator with variable duty cycle • NTC thermistor in a voltage divider and with an ADC input Privacy Policy: https://www.eehelper.app/ios/privacy/ Terms of Use: https://www.eehelper.app/ios/terms/
Photovoltaic Calculations
This app helps professionals and enthusiasts design, size, and analyze solar plants. It provides precise calculations for various components, optimizing yield and efficiency. Includes theoretical resources and practical tools for immediate use.
- Photovoltaic panel yield calculation
- Sun position and optimal tilt angle
- Solar cable ampacity and cross-section
- Protective device sizing
- Ideal inverter selection
- Panel decay estimation
- Series and parallel panel connections
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THE FUTURE IS SOLAR ENERGY. MAXIMIZE YOUR PLANT'S YIELD. Photovoltaic Calculations is the ultimate app for industry professionals, installers, and renewable energy enthusiasts. Design, size, and analyze every aspect of your solar plant with precision and speed. Get the most out of your solar panels by optimizing every single component simply and instantly! MAIN CALCULATIONS AND SIZING: - Photovoltaic panel yield - Air mass index and fill factor - Sun position and optimal tilt angle - Irradiance on a tilted surface - Solar cell temperature and temperature effect on the module - Integrated tools: compass, inclination, altitude - Solar cable ampacity and cross-section calculation (DC) - Protective device sizing and SPD (Surge Protection Device) requirements - String sizing and short-circuit currents - Ideal inverter selection - Photovoltaic panel decay over the years - Occupied surface area and spacing between module rows - Estimation of daylight hours during the year THEORETICAL AND PRACTICAL RESOURCES: - Series and parallel panel connections - Basic concepts: module, string, and photovoltaic array - Astronomical parameters: solar zenith, solar azimuth, solar declination Everything you need is packed into an intuitive interface, which also includes a VERY USEFUL FORMULARY always at your fingertips. Do not leave efficiency to chance, start designing your perfect solar plant today!
Screenshots
Verdict
The clearest difference is ads: Electronics Engineer Helper at none against Photovoltaic Calculations's shown. Electronics Engineer Helper also leads on ratings volume (442 vs 1). Photovoltaic Calculations's advantage is iOS requirement (15.0 vs 17.0). On price, rating, update cadence and in-app purchases 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
Both are free to download. Electronics Engineer Helper sells 2 in-app purchases, starting at $4.89 per year and Photovoltaic Calculations sells 3 in-app purchases, starting at $0.99 per 3 months. Whichever you choose, the download price is not the number that matters.
Photovoltaic Calculations holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Electronics Engineer Helper has 442 ratings behind it against 1, so its average is the more settled of the two.
Both ship on a similar rhythm, roughly monthly. The most recent releases landed on November 1, 2026 and October 23, 2026 respectively.
| Parameter | Electronics Engineer Helper | Photovoltaic Calculations |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (442 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 97.7% of reviews | — |
| Number of ratings | 442 — better | 1 |
| Update frequency | Monthly | Monthly |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 93 MB | 31 MB |
| Age rating | 12+ | 4+ |
| Developer | Rostyslav Dovhaliuk | Egal Net di Ettore Gallina |
Customer experience
Electronics Engineer Helper
Photovoltaic Calculations
Bugs and requests
Electronics Engineer Helper
Reported bugs
2 issues- Incorrect resistor color code display for some values
- In-app purchase option not working for some users
Requested features
5 requests- Add more circuit schematics and examples
- Include ASCII code to decimal, hex, and octal conversion
- Expand the pinout section with more details
- Add active filter (RC, RL, RLC, LC) calculators
- Include digital to analog converter, transistor, and transformer calculators
Photovoltaic Calculations
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Electronics Engineer Helper
- 1 Year Subscription1 Month trial$4.891 Year
- Lifetime PRO Version$12.49
Photovoltaic Calculations
- PRO Version (3 months)$0.993 Months
- PRO Version (1 year)7 Days trial$2.991 Year
- PRO Version (Lifetime)$89.99
Questions
Is Electronics Engineer Helper free?
Is Photovoltaic Calculations free?
Which has better reviews, Electronics Engineer Helper or Photovoltaic Calculations?
Do Electronics Engineer Helper or Photovoltaic Calculations have ads?
Which is updated more often, Electronics Engineer Helper or Photovoltaic Calculations?
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