# Operational Amplifiers Pro vs calcDS

The clearest difference is price: calcDS at $1.99 against Operational Amplifiers Pro's $4.99. calcDS also leads on iOS requirement (14.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

Operational Amplifiers Pro costs $4.99 and calcDS $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Operational Amplifiers Pro | calcDS |
| --- | --- | --- |
| Price | $4.99 | **$1.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/operational-amplifiers-pro/id6467253953/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Paid | — |
| Size | 14 MB | 3 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ALG Software Lab](https://appshunter.io/developer/1650561236) | [R.David Sisemore](https://appshunter.io/developer/990115240) |

## What reviewers say

### Operational Amplifiers Pro

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

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


### calcDS

[App page](https://appshunter.io/ios/app/calcds/id6470944516)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Operational Amplifiers Pro free?

Operational Amplifiers Pro costs $4.99, with no in-app purchases.

### Is calcDS free?

calcDS costs $1.99, with no in-app purchases.

### Do Operational Amplifiers Pro or calcDS have ads?

Neither Operational Amplifiers Pro nor calcDS shows ads.

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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.*