Comparison

PackDot 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

PackDot

This utility app helps create an inventory for flexographic plates and presses by measuring screen dots, dot diameter, and ink percentage from photos. It offers overlay functions to compare plates with anilox or printed materials, and can read angles and spot colors.

Highlights
  • Flexographic plate inventory
  • Screen dot measurement (LPC/LPI)
  • Dot diameter and area/ink percentage calculation
  • Overlay function for comparison
  • Reading angle and spot colors
  • PDF report generation
Features
Read full description

IMPORTANT: Necessary a coaxial light microscope and a WIFI radial light microscope. To take photos is necessary a LOGIN, visit our web site. We sell a complete tools kit to work with this app, visit our web site: www.flexostore.co.uk This APP create a complete inventory for Flexographic Plates and flexo, offset ou gravure press. The PDF reports, are shared by social networks or email. Measure the dots screen (LPC/LPI), the dot diameter and the area/ink percentual, just taking a photo coupling a metallurgical microscope or using a WIFI microscope. Now with overlay function, to see plate over anilox or plate over printed. Now reading angle and spot colours.

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
Read 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

PackDot4 screens
Operational Amplifiers Pro4 screens

Verdict

The call

The clearest difference is price: PackDot at Free against Operational Amplifiers Pro's $4.99. PackDot also leads on iOS requirement (9.0 vs 17.0). Operational Amplifiers Pro's advantage is rating (5.0 vs 3.0) and chart position (#198 vs unranked). On ratings volume, update cadence, ads and in-app purchases 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

PackDot 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 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

PackDot ships an update every 3 months, Operational Amplifiers Pro every 2 months. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

Scorecard5 real differences · 6 level
PackDot versus Operational Amplifiers Pro: the parameters behind the verdict, then further details
ParameterPackDotOperational Amplifiers Pro
PriceFree — better$4.99
Rating3.0 (2 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank—#198 — better
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS9.0 — better17.0
Further details — not scored
Size74 MB14 MB
Age rating4+4+
DeveloperMarcos SamsoniukALG Software Lab

Customer experience

PackDot

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Operational Amplifiers Pro

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

In-app purchases

None

PackDot

No in-app purchases

None

Operational Amplifiers Pro

No in-app purchases

Questions

Is PackDot free?
PackDot 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, PackDot or Operational Amplifiers Pro?
Operational Amplifiers Pro is rated higher. PackDot averages 3.0 out of 5 from 2 ratings, while Operational Amplifiers Pro averages 5.0 from 1 ratings.
Do PackDot or Operational Amplifiers Pro have ads?
Neither PackDot nor Operational Amplifiers Pro shows ads.
Which is updated more often, PackDot or Operational Amplifiers Pro?
PackDot ships an update every 3 months, and Operational Amplifiers Pro every 2 months. Most recently, PackDot was updated on October 6, 2026 and Operational Amplifiers Pro on October 12, 2026.

Other comparisons