# Power Analysis vs Pebble Docs

Power Analysis and Pebble Docs both sit at 5.0 stars, but that hides the real split: 100% of Pebble Docs's written reviews are positive against 50% of Power Analysis's. Pebble Docs also leads on price (Free vs $4.99) and update cadence (weekly vs every 4 months). Power Analysis's advantage is in-app purchases (none vs 2) and iOS requirement (9.0 vs 18.0). On rating, ratings volume, ads and device support there is nothing between them.

Pebble Docs is free to download; Power Analysis costs $4.99 up front. Pebble Docs sells 2 in-app purchases, starting at $14.99 per month. Power Analysis asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Power Analysis against 5.0 for Pebble Docs. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews are what separate them: 50% of Power Analysis's written reviews are positive against 100% of Pebble Docs's.

Power Analysis ships an update every 4 months, Pebble Docs weekly. The most recent releases landed on September 22, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Power Analysis | Pebble Docs |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/power-analysis/id441831752/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/pebble-docs/id6741703205/reviews) |
| Number of ratings | 3 | 3 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Paid | **Freemium** |
| Size | 3 MB | 18 MB |
| Requires iOS | **9.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [A&X Analytics, LLC](https://appshunter.io/developer/436525441) | [Xiaoyuan Technology (Shenzhen) Co., Ltd.](https://appshunter.io/developer/1765519625) |

## 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


### Pebble Docs

[App page](https://appshunter.io/ios/app/pebble-docs/id6741703205)

This app acts as a powerful document assistant, enabling users to import, organize, and understand their files. It leverages AI to answer questions about document content, generate summaries, and extract key information for better organization and thinking.

**Highlights:** Import and manage documents, Ask questions about document content, Generate document summaries, Extract key information, AI-powered assistance

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pebble Plus | $14.99 | per month |
| Pebble Pro | $19.99 | per month |


## Frequently asked questions

### Is Power Analysis free?

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

### Is Pebble Docs free?

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

### Which has better reviews, Power Analysis or Pebble Docs?

Power Analysis and Pebble Docs are both rated 5.0 out of 5 on the App Store, from 3 and 3 ratings respectively.

### Do Power Analysis or Pebble Docs have ads?

Neither Power Analysis nor Pebble Docs shows ads.

### Which is updated more often, Power Analysis or Pebble Docs?

Power Analysis ships an update every 4 months, and Pebble Docs weekly. Most recently, Power Analysis was updated on September 22, 2026 and Pebble Docs on September 24, 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.*