# Kidrend vs Calculate Standard Deviation

The clearest difference is in-app purchases: Kidrend at none against Calculate Standard Deviation's 1. Kidrend also leads on ads (none vs shown) and update cadence (every 5 weeks vs every 7 months). On price and device support there is nothing between them.

Both are free to download. Calculate Standard Deviation sells 1 one-off in-app purchase. Kidrend asks for nothing beyond the download.

Kidrend ships an update every 5 weeks, Calculate Standard Deviation every 7 months. The most recent releases landed on September 25, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Kidrend | Calculate Standard Deviation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (62 ratings)](https://appshunter.io/ios/app/calculate-standard-deviation/id1591420646/reviews)** |
| Number of ratings | — | **62** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 7 months |
| Monetization | — | Free with in-app purchases |
| Size | 52 MB | 39 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [John Agbude](https://appshunter.io/developer/1533102402) | [Asad Ahsan](https://appshunter.io/developer/1326954499) |

## What reviewers say

### Kidrend

[App page](https://appshunter.io/ios/app/kidrend/id1533102400)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calculate Standard Deviation

[App page](https://appshunter.io/ios/app/calculate-standard-deviation/id1591420646)

This app calculates standard deviation, variance, and other statistical measures for a given set of values. It simplifies complex statistical formulas with a user-friendly interface and accurate results.

**Highlights:** Calculate Standard Deviation, Calculate Variance, Calculate Mean, Calculate Coefficient of Variance, Calculate Standard Error of Mean, User-friendly interface, Accurate statistical results

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard Deviation Premium | $4.99 | one-time |


## Frequently asked questions

### Is Kidrend free?

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

### Is Calculate Standard Deviation free?

Calculate Standard Deviation is free to download, with in-app purchases available.

### Do Kidrend or Calculate Standard Deviation have ads?

Calculate Standard Deviation shows ads; Kidrend does not.

### Which is updated more often, Kidrend or Calculate Standard Deviation?

Kidrend ships an update every 5 weeks, and Calculate Standard Deviation every 7 months. Most recently, Kidrend was updated on September 25, 2026 and Calculate Standard Deviation on October 3, 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.*