Comparison

Electrical Components Quiz 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 Components Quiz

Test your knowledge of electrical components with an AI-powered quiz. Progress through levels by correctly identifying over 2000 components. Earn points for correct answers and lose them for incorrect ones.

Highlights
  • AI-powered component identification
  • Over 2000 electrical components
  • Level-based progression system
  • Scoring system for correct/incorrect answers
  • Retake levels for improvement
Features
Read full description

Identify any electrical component with trained AI model. Electrical Components Quiz: 2000+ electrical components for you to identify and test your knowledge. You need a minimum of 25 points to cross to the next level. Getting 1 correct answer gives you a score of 5 points, you lose 3 points if you give a wrong answer. You can retake a level to get more points. You can identify components such as: -Fuse -Wattmeter -Inductor -Ammeter -Transformer -Step down transformer -Step up transformer -Electric bell -Battery -Three pole isolator -Connected wires -Not connected wires -SPST toggle switch -SPDT toggle switch -Earth ground -Chassis ground -Digital/Common ground -Bus -Resistor(IEEE) -Resistor(IEC) -Potentiometer(IEEE) -Potentiometer(IEC) -Thermistor -Variable resistor(IEC) -Variable resistor(IEEE) -Trimmer resistor -Light bulb -Non polarized capacitor -Polarized capacitor -Variable capacitor -Variable inductor -Iron core inductor -AC Voltage source -DC Voltage source -Current source -Generator -Battery cell -Control voltage source -Control current source -Ohmmeter -Zener diode -Schottky diode -PN junction diode -Photo diode -Varicap diode(Varactor) -Tunnel diode -Light Emitting diode(LED) -Electric motor -NPN Bipolar transistor -PNP Bipolar transistor -Buzzer -Loud speaker -Microphone -Analog to digital converter -Digital to analog converter -Operational amplifier -Schmitt trigger -Crystal oscillator -Dipole antenna -NOT gate (Inverter) -Antenna -AND gate -OR gate -NAND gate -NOR gate -XOR gate -D Flip-Flop -Multiplexer 2 to 1 -Multiplexer 4 to 1 -Demultiplexer 1 to 2 -Demultiplexer 1 to 4 -Open switch -Closed switch -Half inductor -chassis -Pulse -Saw tooth -Step function -Solder bridge -Jumper -Sinusoidal generator -Pulse generator -Triangular wave generator -Basic amplifier -Center tapped transformer -Milli ammeter -Milli voltmeter -Micro ammeter -Light dependent resistor(IEC) -Light dependent resistor(IEEE) -Voltmeter -AC contactor coil -DC contactor coil -AC solenoid coil -DC solenoid coil -Iron core center tapped inductor -Ferrite core center tapped inductor -Attenuator -Current transformer -Buffer -Constant current source -Constant current diode -Circuit breaker -Center tapped inductor -DIP switch -Laser diode -Electrical interlock -Bridge rectifier -4-pole isolator -Feed through capacitor -Loop antenna -Flashing led -Normally open limit switch -Normally close limit switch -DPDT switch -DPST switch -Normally close contact -Normally open push button -Fused isolator -Contactor poles -Three phase supply -Thermal relay -Squirrel cage induction motor -Wound rotor induction motor -Rectifier -Normally open timer contact -Normally close timer contact -Emergency stop push button -Transducer -Tri state buffer -Power outlet -XNOR gate -Thyristor -Three phase induction motor -Emergency switch -Memristor -Normally open thermal relay contact -Normally close thermal relay contact -N-channel FET -P-channel FET -Cathod Ray Oscilloscope (CRO) -DC motor -Photo transistor -Photo darlington -Single phase motor -Opto-isolator(optocoupler) -Relay coil -Relay switch -Solenoid valve -Thermocouple -AC to DC converter -DC to AC converter -DC to DC converter -Cavity resonator -Ceramic resonator -Coaxial cable -Crystal microphone -Current limiting diode -Darlington transistor -Delay line -Globe valve -Butterfly valve -Gate valve -Ball valve -Star winding configuration -Delta winding configuration -Lab winding configuration -Wave winding configuration -Female contact -Male contact -Female plug -Male plug -Galvanometer -Synchronoscope -Varmeter -Tachometer -Normally open flow switch -Normally close flow switch -Normally open level sensor -Normally close level sensor -Enhancement MOSFET -Depletion MOSFET -Solar cell -Thermal switch -Solar panel -Triac -Gunn diode -Single phase motor -Thermocouple Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://forwaelade.web.app/ElectricalComponents/privacy-policy

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 Components Quiz4 screens
555 Timer & Oscillators Guide4 screens

Verdict

The call

The clearest difference is in-app purchases: 555 Timer & Oscillators Guide at none against Electrical Components Quiz's 4. 555 Timer & Oscillators Guide also leads on update cadence (every 5 months vs every 12 months). Electrical Components Quiz's advantage is ads (none vs shown). On price, 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. Electrical Components Quiz sells 4 in-app purchases, starting at $7.99 per 7 days. 555 Timer & Oscillators Guide asks for nothing beyond the download.

UpkeepUpdate frequency

Electrical Components Quiz ships an update every 12 months, 555 Timer & Oscillators Guide every 5 months. The most recent releases landed on October 4, 2026 and October 12, 2026 respectively.

Scorecard3 real differences · 6 level
Electrical Components Quiz versus 555 Timer & Oscillators Guide: the parameters behind the verdict, then further details
ParameterElectrical Components Quiz555 Timer & Oscillators Guide
PriceFreeFree
Rating5.0 (7 ratings) — better—
Number of ratings7 — better—
Update frequencyEvery 12 monthsEvery 5 months — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad — better
Requires iOS17.016.0 — better
Further details — not scored
Size25 MB24 MB
Age rating4+4+
DeveloperForwa Elade WundeALG Software Lab

In-app purchases

4 purchases

Electrical Components Quiz

Subscriptions3
  • Week$7.997 Days
  • Month$19.991 Month
  • Year$29.991 Year
One-time1
  • Unlock full access$5.99
None

555 Timer & Oscillators Guide

No in-app purchases

Questions

Is Electrical Components Quiz free?
Electrical Components Quiz is free to download, with in-app purchases available.
Is 555 Timer & Oscillators Guide free?
555 Timer & Oscillators Guide is free to download, with no in-app purchases.
Do Electrical Components Quiz or 555 Timer & Oscillators Guide have ads?
555 Timer & Oscillators Guide shows ads; Electrical Components Quiz does not.
Which is updated more often, Electrical Components Quiz or 555 Timer & Oscillators Guide?
Electrical Components Quiz ships an update every 12 months, and 555 Timer & Oscillators Guide every 5 months. Most recently, Electrical Components Quiz was updated on October 4, 2026 and 555 Timer & Oscillators Guide on October 12, 2026.

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