# why数理 vs PxPal

The clearest difference is in-app purchases: why数理 at none against PxPal's 3. why数理 also leads on ads (none vs shown) and update cadence (fortnightly vs every 6 weeks). On price and device support there is nothing between them.

Both are free to download. PxPal sells 3 in-app purchases, starting at $0.99 per month. why数理 asks for nothing beyond the download.

why数理 ships an update fortnightly, PxPal every 6 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | why数理 | PxPal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (13 ratings)](https://appshunter.io/ios/app/pxpal-gaming-buddy/id6746524312/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 71 MB | 168 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [靖一 陈](https://appshunter.io/developer/1529972276) | [书彦 张](https://appshunter.io/developer/1698930649) |

## What reviewers say

### why数理

[App page](https://appshunter.io/ios/app/why/id1539375758)

**Features:** macOS Compatibility

**In-app purchases:** none


### PxPal

[App page](https://appshunter.io/ios/app/pxpal-gaming-buddy/id6746524312)

This app helps PlayStation gamers track their progress, manage their game library, and monitor trophy completion across PSVita, PS3, PS4, and PS5. It offers personalized gaming statistics, insights, and a leaderboard for competitive players. An optional subscription unlocks premium features.

**Highlights:** Game library management, Trophy tracking and progress, Player profile and statistics, Dark mode interface, Widgets support, In-game activity progress tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $0.99 | per month |
| Yearly Pro | $4.99 | per year |
| PxPal Pro Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is why数理 free?

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

### Is PxPal free?

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

### Do why数理 or PxPal have ads?

PxPal shows ads; why数理 does not.

### Which is updated more often, why数理 or PxPal?

why数理 ships an update fortnightly, and PxPal every 6 weeks. Most recently, why数理 was updated on November 3, 2026 and PxPal on November 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.*