# Vector Calculator Plus vs Voltage Drop Pro

The clearest difference is price: Voltage Drop Pro at Free against Vector Calculator Plus's $2.99. Voltage Drop Pro also leads on update cadence (every 3 months vs every 43 months). Vector Calculator Plus's advantage is in-app purchases (none vs 1) and iOS requirement (13 vs 15.1). On ads and device support there is nothing between them.

Voltage Drop Pro is free to download; Vector Calculator Plus costs $2.99 up front. Voltage Drop Pro sells 1 one-off in-app purchase. Vector Calculator Plus asks for nothing beyond the download.

Vector Calculator Plus ships an update every 43 months, Voltage Drop Pro every 3 months. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Vector Calculator Plus | Voltage Drop Pro |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/vector-calculator-plus/id1630864948/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 43 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 1 MB | 39 MB |
| Requires iOS | **13** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Heng Jia Liang](https://appshunter.io/developer/1532000635) | [BRUCE RAY MCCAMPBELL](https://appshunter.io/developer/6772438648) |

## 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, Vision Pro support

**In-app purchases:** none


### Voltage Drop Pro

[App page](https://appshunter.io/ios/app/voltage-drop-pro-electrician/id6781791471)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Voltage Drop Pro | $2.99 | one-time |


## Frequently asked questions

### Is Vector Calculator Plus free?

Vector Calculator Plus costs $2.99, with no in-app purchases.

### Is Voltage Drop Pro free?

Voltage Drop Pro is free to download, with in-app purchases available.

### Do Vector Calculator Plus or Voltage Drop Pro have ads?

Neither Vector Calculator Plus nor Voltage Drop Pro shows ads.

### Which is updated more often, Vector Calculator Plus or Voltage Drop Pro?

Vector Calculator Plus ships an update every 43 months, and Voltage Drop Pro every 3 months. Most recently, Vector Calculator Plus was updated on November 3, 2026 and Voltage Drop Pro on October 28, 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.*