Comparison

8051 Tutorial vs Operational Amplifiers Guide

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

Head to head
About

8051 Tutorial

Learn 8051 microcontroller programming in C with this comprehensive tutorial. It covers architecture, assembly, and C language, featuring 11 practical projects. An optional Pro version offers additional projects with source code and advanced features.

Highlights
  • 8051 architecture review
  • 8051 assembly mnemonics
  • 8051 C language programming
  • 11 practical projects
  • Baud calculator
  • Pro version with extra projects and source code
Features
Read full description

This app is a 8051 tutorial based on C language. It is suitable for hobbyist or engineering students. Features • 8051 architecture review • 8051 asm mnemonics • 8051 C language • 11 projects including LED, buzzer, key switch, external interrupt, 7-segment display, 8x8 led matrix, timer (mode 0,1 ) • Baud calculator Features in Pro • Extra 11 projects with source code • Projects with complete uVision project and document • Create C source code of timer mode 0,1,2 • Data pattern code generator of 8x8 LED matrix All product names, trademarks and registered trademarks are property of their respective owners. All company, product and service names used in this app are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.

About

Operational Amplifiers Guide

Features
Read full description

Operational Amplifiers Guide is your essential tool for designing and analyzing circuits using op-amps and comparators. Whether you're a student, electronics enthusiast, or experienced engineer, this app helps you create, calculate, and understand a wide variety of op-amp–based circuits with ease. Use it as a practical reference when developing projects, building prototypes, or studying amplifier configurations. The app also includes technical data on popular operational amplifier and comparator series — making it a handy guide for both design and selection. 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! Key Features: • Interactive calculators for common op-amp circuits • Step-by-step explanations and formulas • Reference info on op-amps and comparators • Ideal for learning, prototyping, or quick checks • Light and dark mode support The application contains the following guides and calculators: Amplifiers • Non-inverting operational amplifier • Inverting operational amplifier • Inverting amplifier with T-bridge in OS • Differential amplifier • Differential amplifier with T-bridge in OS • Voltage repeater • Inverting voltage repeater • AC voltage amplifier • High Input Impedance AC Voltage Amplifier • AC voltage repeater ActiveFilters • Non-inverting low-pass filter • Inverting low-pass filter • Non-inverting high-pass filter • Inverting high pass filter • Bandpass filter • Gyrator Integrators and differentiators • Voltage integrator • Sum integrator • Integrator with signal amplification • Difference integrator • Double integrator • Voltage differentiator • Sum Differentiator • Differentiator with T-bridge • Differentiator with T-bridge made of capacitors • Difference differentiator Comparators • Comparator • Limiter • Limiter with zener diode at the input • RS trigger Attenuators • Non-inverting attenuator • Inverting attenuator Converters • Voltage-to-current converter with non-inverting input • Voltage to current converter with inverting input • Voltage to current converter with differential input Adders and substactors • Inverting adder • Addition-subtraction circuit • Non-inverting adder Logarithmic and exponential amplifiers • Diode-based logarithmic amplifier • Transistor-based logarithmic amplifier • Diode exponential amplifier • Exponential transistor amplifier Sine Wave generators: • Op-Amp Oscillators • Oscillator with Diode in the Feedback Path • Twin-T Network Signal Generator Square-wave pulse generators • Op-Amp Square-Wave Generator • Adjustable Square-Wave Generator • Enhanced Square-Wave Generator • Duty-Cycle Adjustment Triangle-wave signal generators • Nonlinear Triangle-Wave Generator • Variable-Symmetry Sawtooth Generator • Linear Triangle-Wave Generator • Adjustable Linear Triangle-Wave Generator • Variable-Symmetry Ramp Generator Popular operational amplifiers: description and pinout Popular comparators: description and pinout Download now and power up your electronics work!

Screenshots

8051 Tutorial4 screens
Operational Amplifiers Guide4 screens

Verdict

The call

The clearest difference is in-app purchases: Operational Amplifiers Guide at none against 8051 Tutorial's 10. 8051 Tutorial's advantage is ads (none vs shown) and iOS requirement (12.0 vs 16.0). On price, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 8051 Tutorial sells 10 one-off in-app purchases. Operational Amplifiers Guide asks for nothing beyond the download.

UpkeepUpdate frequency

8051 Tutorial ships an update every 3 months, Operational Amplifiers Guide every 2 months. The most recent releases landed on September 16, 2026 and September 19, 2026 respectively.

Scorecard3 real differences · 7 level
8051 Tutorial versus Operational Amplifiers Guide: the parameters behind the verdict, then further details
Parameter8051 TutorialOperational Amplifiers Guide
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better16.0
Further details — not scored
Size17 MB17 MB
Age rating4+4+
DeveloperSiu Yuen HoALG Software Lab

In-app purchases

10 purchases

8051 Tutorial

One-time10
  • 24L01$0.99
  • 18B20$0.99
  • OLED$0.99
Show 7 more
  • Unlock Pro features$1.99
  • ESP8266$1.99
  • BMP180 project$1.99
  • DHT11 project$1.99
  • DHT22 project$1.99
  • BMP280 project$1.99
  • Wireless automation (BT)$1.99
None

Operational Amplifiers Guide

No in-app purchases

Questions

Is 8051 Tutorial free?
8051 Tutorial is free to download, with in-app purchases available.
Is Operational Amplifiers Guide free?
Operational Amplifiers Guide is free to download, with no in-app purchases.
Do 8051 Tutorial or Operational Amplifiers Guide have ads?
Operational Amplifiers Guide shows ads; 8051 Tutorial does not.
Which is updated more often, 8051 Tutorial or Operational Amplifiers Guide?
8051 Tutorial ships an update every 3 months, and Operational Amplifiers Guide every 2 months. Most recently, 8051 Tutorial was updated on September 16, 2026 and Operational Amplifiers Guide on September 19, 2026.

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