# 格纸 vs Standard Deviation Calc

The clearest difference is in-app purchases: 格纸 at none against Standard Deviation Calc's 1. Standard Deviation Calc's advantage is ads (none vs shown) and ratings volume (12 vs 1). On price, rating, update cadence and device support there is nothing between them.

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

格纸 holds the better App Store score, 4.0 against 3.8. That said, the two scores are not equally well evidenced: Standard Deviation Calc has 12 ratings behind it against 1, so its average is the more settled of the two.

格纸 ships an update every 4 months, Standard Deviation Calc every 5 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 格纸 | Standard Deviation Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/id1430563682/reviews)** | [3.8 (12 ratings)](https://appshunter.io/ios/app/standard-deviation-calc-sd/id1497525733/reviews) |
| Number of ratings | 1 | **12** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 2 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [泉华 官](https://appshunter.io/developer/904884942) | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) |

## What reviewers say

### 格纸

[App page](https://appshunter.io/ios/app/id1430563682)

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

**In-app purchases:** none


### Standard Deviation Calc

[App page](https://appshunter.io/ios/app/standard-deviation-calc-sd/id1497525733)

Calculate standard deviation for sample or population data. Input numerical values to find standard deviation, count, sum, mean, variance, and more. Get quick statistical insights with this easy-to-use tool.

**Highlights:** Calculate standard deviation, Sample or population data, Compute mean and variance, Count numerical values, Sum of numbers, List of differences

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |


## Frequently asked questions

### Is 格纸 free?

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

### Is Standard Deviation Calc free?

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

### Which has better reviews, 格纸 or Standard Deviation Calc?

格纸 is rated higher. 格纸 averages 4.0 out of 5 from 1 ratings, while Standard Deviation Calc averages 3.8 from 12 ratings.

### Do 格纸 or Standard Deviation Calc have ads?

格纸 shows ads; Standard Deviation Calc does not.

### Which is updated more often, 格纸 or Standard Deviation Calc?

格纸 ships an update every 4 months, and Standard Deviation Calc every 5 months. Most recently, 格纸 was updated on November 2, 2026 and Standard Deviation Calc on November 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.*