# Scientific Calculator++ vs Standard Deviation

The clearest difference is price: Standard Deviation at Free against Scientific Calculator++'s $2.99. Standard Deviation also leads on in-app purchases (none vs 2) and update cadence (every 2 months vs every 38 months). On ads and iOS requirement there is nothing between them.

Standard Deviation is free to download; Scientific Calculator++ costs $2.99 up front. Scientific Calculator++ sells 2 one-off in-app purchases. Standard Deviation asks for nothing beyond the download.

Scientific Calculator++ ships an update every 38 months, Standard Deviation every 2 months. The most recent releases landed on October 15, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Scientific Calculator++ | Standard Deviation |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (21 ratings)](https://appshunter.io/ios/app/scientific-calculator-plus-plus/id581543619/reviews)** | — |
| Number of ratings | **21** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 3 MB | 21 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Dogahe](https://appshunter.io/developer/468657946) | [Ahmad Sattar](https://appshunter.io/developer/1458483953) |

## What reviewers say

### Scientific Calculator++

[App page](https://appshunter.io/ios/app/scientific-calculator-plus-plus/id581543619)

This powerful calculator app offers advanced functions for complex calculations, including fraction manipulation, angle conversions, and equation solving. It features a history of your calculations and a user-friendly interface designed for iPad.

**Highlights:** Calculation history, Fraction manipulation, Angle conversion (degrees, minutes, seconds), Permutation and combination calculations, LCM and GCD, Equation solver, Coordinate conversion

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| List Size Plus | $0.99 | one-time |
| Quadratic Plus | $0.99 | one-time |


### Standard Deviation

[App page](https://appshunter.io/ios/app/standard-deviation-calculator/id6444146244)

**In-app purchases:** none


## Frequently asked questions

### Is Scientific Calculator++ free?

Scientific Calculator++ costs $2.99, and also offers in-app purchases.

### Is Standard Deviation free?

Standard Deviation is free to download, with no in-app purchases.

### Do Scientific Calculator++ or Standard Deviation have ads?

Neither Scientific Calculator++ nor Standard Deviation shows ads.

### Which is updated more often, Scientific Calculator++ or Standard Deviation?

Scientific Calculator++ ships an update every 38 months, and Standard Deviation every 2 months. Most recently, Scientific Calculator++ was updated on October 15, 2026 and Standard Deviation on September 30, 2026.

---

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