# SOPr vs P

The clearest difference is price: SOPr at Free against P's $3.99. P's advantage is in-app purchases (none vs 6) and update cadence (every 2 weeks vs every 2 months). On ads, device support and iOS requirement there is nothing between them.

SOPr is free to download; P costs $3.99 up front. SOPr sells 6 in-app purchases, starting at $4.99 per month. P asks for nothing beyond the download.

SOPr ships an update every 2 months, P every 2 weeks. The most recent releases landed on September 18, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | SOPr | P |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/p-star-study-guide/id6532620287/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | — | Paid |
| Size | 39 MB | 47 MB |
| Requires iOS | 14.0.0 | **13.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [John-Charles Pinheiro](https://appshunter.io/developer/1752562998) | [Bob Knight](https://appshunter.io/developer/1756747559) |

## What reviewers say

### SOPr

[App page](https://appshunter.io/ios/app/sopr/id6504500014)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cat I: Monthly | $4.99 | per month |
| Cat I: Annual + Free Trial | $29.99 | per year |
| SOPr Solo | $49.99 | per 3 months |
| SOPr Solo | $99.99 | per year |
| SOPr FPT | $99.99 | per 3 months |
| SOPr FPT | $249.99 | per year |


### P

[App page](https://appshunter.io/ios/app/p-star-study-guide/id6532620287)

Prepare for pilot knowledge tests with a comprehensive study guide. It features 185 multiple-choice questions across 14 aviation topics, offering practice, review, and performance summaries to ensure mastery of essential aeronautical concepts.

**Highlights:** 185 multiple-choice questions, 14 aviation topics, Practice categories, Performance summaries, Review incorrect answers, Acronym reference

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

**In-app purchases:** none


## Frequently asked questions

### Is SOPr free?

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

### Is P free?

P costs $3.99, with no in-app purchases.

### Do SOPr or P have ads?

Neither SOPr nor P shows ads.

### Which is updated more often, SOPr or P?

SOPr ships an update every 2 months, and P every 2 weeks. Most recently, SOPr was updated on September 18, 2026 and P on September 22, 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.*