Comparison

Electronics Reference Toolkit vs VoltSize

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

Head to head
About

Electronics Reference Toolkit

This app provides a comprehensive suite of tools for electronics calculations and reference. It includes calculators for resistors, LEDs, capacitors, and voltage dividers, along with a unit converter and transistor database. Designed for speed and offline use, it's ideal for students, hobbyists, and engineers.

Highlights
  • Resistor Calculator (4/5 band)
  • Ohm's Law Calculator
  • LED Resistor Calculator
  • Capacitor Decoder
  • Voltage Divider Calculator
  • Unit Converter
  • Transistor Reference
Features
Read full description

ElecKit is a lightweight electronics toolkit built for fast lookups and quick calculations—perfect for students, hobbyists, and engineers. Tools included - Resistor Calculator (4/5 band) + tolerance & range - Ohm’s Law (V/I/R/P) - LED Resistor Calculator (Vs, Vf, If) - Capacitor Decoder (3-digit & EIA codes) - Voltage Divider (2 or 3 resistors) - RC/RL Time Constant with charging curve & key points (1τ…5τ) - Unit Converter (Ω, F, H, Hz + prefixes) - Battery Life Estimator (battery type, load current, duty cycle) - Transistor Reference (NPN, PNP, MOSFET) with fast search & filters Notes * Designed for speed, clean UI, and offline use. * Reference values may vary by manufacturer—always confirm with the datasheet.

About

VoltSize

Features
Read full description

VoltSize is a complete calculation and planning toolkit for anyone building a solar power system. CALCULATORS - Panel Sizing: how many watts of panels you need based on your daily consumption - Battery Capacity: compare LiFePO4, AGM, Gel and other battery types - Inverter Sizing: find the right inverter power with a safety margin - Cable Gauge: pick the right wire thickness based on voltage drop - Daily Consumption: pick from a ready device library to total your Wh/day WIZARDS Step-by-step guided wizards for Home, Caravan and Boat setups: pick your system voltage and battery type, add your devices, enter your sun hours, see results instantly. PANEL ANGLE & DIRECTION Pick your location on the map or use GPS; VoltSize suggests the optimal panel tilt angle and direction. Then use your phone's camera and compass to measure the panel's real angle and direction live. SHARE Export your wizard results or device list as a PDF and share it via WhatsApp, email, or any app you choose. All data stays on your device. Calculations in VoltSize are estimates; always consult a licensed electrician or solar installer before any real installation.

Screenshots

Electronics Reference Toolkit4 screens
VoltSize4 screens

Verdict

The call

The clearest difference is ads: Electronics Reference Toolkit at none against VoltSize's shown. On price, in-app purchases, device support and iOS requirement 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.

Scorecard1 real difference · 8 level
Electronics Reference Toolkit versus VoltSize: the parameters behind the verdict, then further details
ParameterElectronics Reference ToolkitVoltSize
PriceFreeFree
Rating4.9 (7 ratings) — better—
Number of ratings7 — better—
Update frequencyFortnightly—
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone, iPad — better
Requires iOS16.616.4 — better
Further details — not scored
Size7 MB46 MB
Age rating4+4+
DeveloperHa Do Thi ThuEmin Burak YILDIRIM

In-app purchases

None

Electronics Reference Toolkit

No in-app purchases

None

VoltSize

No in-app purchases

Questions

Is Electronics Reference Toolkit free?
Electronics Reference Toolkit is free to download, with no in-app purchases.
Is VoltSize free?
VoltSize is free to download, with no in-app purchases.
Do Electronics Reference Toolkit or VoltSize have ads?
VoltSize shows ads; Electronics Reference Toolkit does not.

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