# Power Analysis vs Ottermind

The clearest difference is price: Ottermind at Free against Power Analysis's $4.99. Ottermind also leads on update cadence (weekly vs every 4 months). Power Analysis's advantage is in-app purchases (none vs 4) and iOS requirement (9.0 vs 16.4). On ads and device support there is nothing between them.

Ottermind is free to download; Power Analysis costs $4.99 up front. Ottermind sells 4 in-app purchases, starting at $58.00 per month. Power Analysis asks for nothing beyond the download.

Power Analysis ships an update every 4 months, Ottermind weekly. The most recent releases landed on September 22, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Power Analysis | Ottermind |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/power-analysis/id441831752/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Paid | — |
| Size | 3 MB | 88 MB |
| Requires iOS | **9.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [A&X Analytics, LLC](https://appshunter.io/developer/436525441) | [爱獭科技(杭州)有限公司](https://appshunter.io/developer/1895619583) |

## What reviewers say

### Power Analysis

[App page](https://appshunter.io/ios/app/power-analysis/id441831752)

Design experiments and analyze data with confidence, even without extensive statistical knowledge. This app guides you through planning studies, determining necessary sample sizes, and understanding measurement quality. It supports various distribution types and automatically selects appropriate statistical tests.

**Highlights:** Guided experiment design, Sample size determination, Measurement quality assessment, Support for various distributions, Automatic statistical test selection, Interactive parameter adjustment

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

**In-app purchases:** none


### Ottermind

[App page](https://appshunter.io/ios/app/ottermind/id6764060074)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Otter Squad Monthly | $58.00 | per month |
| Otter Squad Yearly | $549.99 | per year |
| 1,500 credits | $11.90 | one-time |
| 3,000 credits | $23.49 | one-time |


## Frequently asked questions

### Is Power Analysis free?

Power Analysis costs $4.99, with no in-app purchases.

### Is Ottermind free?

Ottermind is free to download, with in-app purchases available.

### Do Power Analysis or Ottermind have ads?

Neither Power Analysis nor Ottermind shows ads.

### Which is updated more often, Power Analysis or Ottermind?

Power Analysis ships an update every 4 months, and Ottermind weekly. Most recently, Power Analysis was updated on September 22, 2026 and Ottermind on October 5, 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.*