FlexoCalculator vs Operational Amplifiers Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FlexoCalculator
This tool assists flexo prepress operators with essential calculations for screen dimensions, minimum print effects, and plate compression distortion. It also handles unit conversions between metric and imperial standards, offering a consolidated solution for prepress needs.
- Calculate screen dimensions in microns
- Assess minimum print effects ('dipping')
- Determine plate compression distortion
- Convert metric to imperial units
- Convert imperial to metric units
- Brand-free and customizable
Read full descriptionHide full description
FlexoCalculator was born from the need to aggregate into a single iOS native tool, many useful features for flexo prepress operators. FlexoCalculator lets you to calculate your screen dimension in microns, to let you know if your printed minimum will be affected by "dipping", if and how much the plate compressione will distort your prints. Flexocalculator will let you convert units from metric to imperial standards and viceversa. The benefits of using FlexoCalculator are: it is a unique tool for all your computing and conversion needs, is brand free, could be tailored to your specific implementation requests.
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.
- 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)
Read full descriptionHide full description
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
Verdict
The clearest difference is price: FlexoCalculator at $2.99 against Operational Amplifiers Pro's $4.99. On rating, ratings volume, update cadence and ads 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
FlexoCalculator costs $2.99 and Operational Amplifiers Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for FlexoCalculator against 5.0 for Operational Amplifiers Pro. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 29, 2026 and October 1, 2026 respectively.
| Parameter | FlexoCalculator | Operational Amplifiers Pro |
|---|---|---|
| Price | $2.99 — better | $4.99 |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.6 — better | 16.0 |
| Further details — not scored | ||
| Size | 12 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Mauro Lussignoli | ALG Software Lab |
Customer experience
FlexoCalculator
Operational Amplifiers Pro
In-app purchases
FlexoCalculator
No in-app purchases
Operational Amplifiers Pro
No in-app purchases
Questions
Is FlexoCalculator free?
Is Operational Amplifiers Pro free?
Which has better reviews, FlexoCalculator or Operational Amplifiers Pro?
Do FlexoCalculator or Operational Amplifiers Pro have ads?
Which is updated more often, FlexoCalculator or Operational Amplifiers Pro?
Other comparisons















