555 Timer & Oscillators Guide vs Power Electronics
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
555 Timer & Oscillators Guide
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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.
Power Electronics
This quiz app covers over 70 topics in power electronics, including switches, drive circuits, regulators, and various electronic components. It's designed to help users master the subject through interactive learning.
- Over 70 power electronics topics
- Covers switches, drive circuits, regulators
- Detailed component listings
- Interactive quiz format
- Master power electronics concepts
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Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Power Electronics is a quiz app made up of over 70 different topics in Power Electronics. You can access topics such as: Power Semiconductor Switches,Drive Circuits,Rectifiers,DC–DC Linear Regulators, DC–DC Switched-Mode Converters,DC–AC Switched-Mode Converters,Design of Magnetics,Modeling of Systems,Control System Essentials, Digital Controller -Diodes -Bipolar Power Transistors -Power MOSFETs -Insulated Gate Bipolar Transistor (IGBT) -Thyristor Family -Transistor Drive Circuits -MOSFET Drive Circuits -Generic Linear Regulator -Linear Regulator Topologies -Parameters of the Linear Regulator -Analysis of a Series Regulator -Analysis of a Current Regulator -Electric bell -Three pole isolator -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 -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 -Touch sensor -Noise source -Power factor meter
Screenshots
Verdict
The clearest difference is in-app purchases: 555 Timer & Oscillators Guide at none against Power Electronics's 6. Power Electronics's advantage is ads (none vs shown) and update cadence (every 2 months vs every 5 months). 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
Both are free to download. Power Electronics sells 6 in-app purchases, starting at $9.99 per month. 555 Timer & Oscillators Guide asks for nothing beyond the download.
555 Timer & Oscillators Guide ships an update every 5 months, Power Electronics every 2 months. The most recent releases landed on September 24, 2026 and September 18, 2026 respectively.
| Parameter | 555 Timer & Oscillators Guide | Power Electronics |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 24 MB | 22 MB |
| Age rating | +4 | 4+ |
| Developer | ALG Software Lab | Forwa Elade Wunde |
In-app purchases
555 Timer & Oscillators Guide
No in-app purchases
Power Electronics
- 1 Month$9.991 Month
- 6 Months$19.996 Months
- 1 Year$29.991 Year
- 1500$0.99
- 3500$1.99
- 9000$3.99
Questions
Is 555 Timer & Oscillators Guide free?
Is Power Electronics free?
Do 555 Timer & Oscillators Guide or Power Electronics have ads?
Which is updated more often, 555 Timer & Oscillators Guide or Power Electronics?
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