# PackDot vs Operational Amplifiers Pro

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.

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.

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.

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.

## The numbers

| Metric | PackDot | Operational Amplifiers Pro |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/packdot/id1324367700/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/operational-amplifiers-pro/id6467253953/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#198** |
| Size | 74 MB | 14 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Marcos Samsoniuk](https://appshunter.io/developer/1047007772) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### PackDot

[App page](https://appshunter.io/ios/app/packdot/id1324367700)

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:** macOS Compatibility

**In-app purchases:** none


### Operational Amplifiers Pro

[App page](https://appshunter.io/ios/app/operational-amplifiers-pro/id6467253953)

**Currently charting:** #198 Top Paid · Utilities (US App Store)

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:** Vision Pro support

**In-app purchases:** none


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*