# Standard Deviation Calculate vs 彩虹小组件

The clearest difference is ads: Standard Deviation Calculate at none against 彩虹小组件's shown. Standard Deviation Calculate also leads on iOS requirement (11.0 vs 14.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Standard Deviation Calculate sells 1 one-off in-app purchase and 彩虹小组件 sells 7 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 3, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Standard Deviation Calculate | 彩虹小组件 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/standard-deviation-calculate/id1600862053/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 5 MB | 201 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [天一 邓](https://appshunter.io/developer/1056154014) | [Extreme Point](https://appshunter.io/developer/1895910092) |

## What reviewers say

### Standard Deviation Calculate

[App page](https://appshunter.io/ios/app/standard-deviation-calculate/id1600862053)

This utility calculates the standard deviation of a dataset, a key statistical measure of data dispersion. It helps understand how spread out values are from the average, with applications in science, industry, and finance.

**Highlights:** Calculate standard deviation, Measure data dispersion, Understand variation from mean, Applications in science and finance, Statistical analysis tool

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 标准差计算器专业版 | $2.99 | one-time |


### 彩虹小组件

[App page](https://appshunter.io/ios/app/and/id1629289577)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续包月VIP | $0.99 | per month |
| 连续包季VIP | $1.49 | per 3 months |
| 连续包年VIP | $3.49 | per year |
| 1个月VIP | $0.99 | one-time |
| 3个月VIP | $1.99 | one-time |
| 永久VIP | $3.99 | one-time |
| 12个月VIP | $5.99 | one-time |


## Frequently asked questions

### Is Standard Deviation Calculate free?

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

### Is 彩虹小组件 free?

彩虹小组件 is free to download, with in-app purchases available.

### Do Standard Deviation Calculate or 彩虹小组件 have ads?

彩虹小组件 shows ads; Standard Deviation Calculate does not.

### Which is updated more often, Standard Deviation Calculate or 彩虹小组件?

Standard Deviation Calculate ships an update every 2 months, and 彩虹小组件 every 2 months. Most recently, Standard Deviation Calculate was updated on October 3, 2026 and 彩虹小组件 on October 13, 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.*