# エアミル vs Standard Deviation Calc

The clearest difference is in-app purchases: エアミル at none against Standard Deviation Calc's 1. エアミル also leads on review sentiment (33% vs 0%) and update cadence (every 5 days vs every 5 months). On price, ads and device support there is nothing between them.

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

エアミル ships an update every 5 days, Standard Deviation Calc every 5 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | エアミル | Standard Deviation Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.8 (12 ratings)](https://appshunter.io/ios/app/standard-deviation-calc-sd/id1497525733/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | **33.3% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 5 months |
| Monetization | — | Free with in-app purchases |
| Size | 2 MB | 2 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RATOC Systems, Inc.](https://appshunter.io/developer/568725272) | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) |

## What reviewers say

### エアミル

[App page](https://appshunter.io/ios/app/id1263783470)

**Features:** macOS Compatibility

**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 エアミル free?

エアミル 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.

### Do エアミル or Standard Deviation Calc have ads?

Neither エアミル nor Standard Deviation Calc shows ads.

### Which is updated more often, エアミル or Standard Deviation Calc?

エアミル ships an update every 5 days, and Standard Deviation Calc every 5 months. Most recently, エアミル was updated on October 24, 2026 and Standard Deviation Calc on October 24, 2026.

---

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