Comparison

Z3 Control 2 vs Operational Amplifiers Pro

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

Head to head
About

Z3 Control 2

Adjust speaker volume, enhance bass, and connect your device to a wireless network. This utility also allows you to check for and install speaker firmware updates to access new features.

Highlights
  • Adjust speaker volume
  • Enhance bass
  • Wireless network setup
  • Check for firmware updates
  • Install new features
Features
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Control your speaker from your phone. This app will allow you to adjust speaker volume and enhance your bass. It will help you to put the speaker on your wireless network. No more need to look for Ethernet cables. You can also use this app to check for new speaker firmware and stay updated with the newest features.

About

Operational Amplifiers Pro

This app provides interactive calculators and reference information for designing and analyzing op-amp circuits. It offers step-by-step explanations and technical data on popular op-amp series, aiding students and engineers in circuit development and prototyping.

Highlights
  • Interactive op-amp circuit calculators
  • Step-by-step explanations and formulas
  • Reference data on op-amps and comparators
  • Support for 14 languages
  • Light and dark mode
  • Advanced calculators and circuit guides (Pro)
  • Full-text search (Pro)
Features
Currently charting
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Operational Amplifiers Pro is your essential tool for designing and analyzing circuits using op-amps. 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 Pro Version Includes: • Advanced calculators and circuit guides • Full-text topic search • Save favorite circuits for quick access 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 • Popular operational amplifiers description and pinout 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 and Square-Wave Generator • Generator with Adjustable Slope and Duty Cycle 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 Download now and power up your electronics work!

Screenshots

Z3 Control 24 screens
Operational Amplifiers Pro4 screens

Verdict

The call

The clearest difference is price: Z3 Control 2 at Free against Operational Amplifiers Pro's $4.99. Z3 Control 2 also leads on ratings volume (5 vs 1) and iOS requirement (12.0 vs 17.0). Operational Amplifiers Pro's advantage is rating (5.0 vs 1.0) and chart position (#198 vs unranked). On ads, in-app purchases 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

Z3 Control 2 is free to download; Operational Amplifiers Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Operational Amplifiers Pro holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: Z3 Control 2 has 5 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Z3 Control 2 ships an update every 4 months, Operational Amplifiers Pro every 2 months. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.

Scorecard7 real differences · 4 level
Z3 Control 2 versus Operational Amplifiers Pro: the parameters behind the verdict, then further details
ParameterZ3 Control 2Operational Amplifiers Pro
PriceFree — better$4.99
Rating1.0 (5 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings5 — better1
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank—#198 — better
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS12.0 — better17.0
Further details — not scored
Size18 MB14 MB
Age rating4+4+
DeveloperELAC Americas Inc.ALG Software Lab

Customer experience

Z3 Control 2

All ratings5 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Operational Amplifiers Pro

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Z3 Control 2

No in-app purchases

None

Operational Amplifiers Pro

No in-app purchases

Questions

Is Z3 Control 2 free?
Z3 Control 2 is free to download, with no in-app purchases.
Is Operational Amplifiers Pro free?
Operational Amplifiers Pro costs $4.99, with no in-app purchases.
Which has better reviews, Z3 Control 2 or Operational Amplifiers Pro?
Operational Amplifiers Pro is rated higher. Z3 Control 2 averages 1.0 out of 5 from 5 ratings, while Operational Amplifiers Pro averages 5.0 from 1 ratings.
Do Z3 Control 2 or Operational Amplifiers Pro have ads?
Neither Z3 Control 2 nor Operational Amplifiers Pro shows ads.
Which is updated more often, Z3 Control 2 or Operational Amplifiers Pro?
Z3 Control 2 ships an update every 4 months, and Operational Amplifiers Pro every 2 months. Most recently, Z3 Control 2 was updated on October 16, 2026 and Operational Amplifiers Pro on October 12, 2026.

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