# Vector Calculator Plus vs Operational Amplifiers Pro

The clearest difference is rating: Operational Amplifiers Pro at 5.0 against Vector Calculator Plus's 4.0. Operational Amplifiers Pro also leads on update cadence (every 2 months vs every 43 months). Vector Calculator Plus's advantage is price ($2.99 vs $4.99) and iOS requirement (13 vs 16.0). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Vector Calculator Plus costs $2.99 and Operational Amplifiers Pro $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 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Vector Calculator Plus ships an update every 43 months, Operational Amplifiers Pro every 2 months. The most recent releases landed on July 9, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Vector Calculator Plus | Operational Amplifiers Pro |
| --- | --- | --- |
| Price | **$2.99** | $4.99 |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/vector-calculator-plus/id1630864948/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/operational-amplifiers-pro/id6467253953/reviews)** |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 43 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 1 MB | 14 MB |
| Requires iOS | **13** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Heng Jia Liang](https://appshunter.io/developer/1532000635) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### Vector Calculator Plus

[App page](https://appshunter.io/ios/app/vector-calculator-plus/id1630864948)

This app simplifies vector addition for students and educators. It allows for quick calculations of multiple vectors, visualizing the results with generated graphs. Users can customize graph elements and save images for later use.

**Highlights:** Instant vector calculation, Add multiple vectors by x, y, magnitude, or angle, Generate vector images, Save vector images to camera roll, Customize graph display options, Set background color for graphs

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Vector Calculator Plus free?

Vector Calculator Plus costs $2.99, 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, Vector Calculator Plus or Operational Amplifiers Pro?

Operational Amplifiers Pro is rated higher. Vector Calculator Plus averages 4.0 out of 5 from 1 ratings, while Operational Amplifiers Pro averages 5.0 from 1 ratings.

### Do Vector Calculator Plus or Operational Amplifiers Pro have ads?

Neither Vector Calculator Plus nor Operational Amplifiers Pro shows ads.

### Which is updated more often, Vector Calculator Plus or Operational Amplifiers Pro?

Vector Calculator Plus ships an update every 43 months, and Operational Amplifiers Pro every 2 months. Most recently, Vector Calculator Plus was updated on July 9, 2026 and Operational Amplifiers Pro on September 16, 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.*