# Problem solver vs Physics Flashcards & Quiz

The clearest difference is in-app purchases: Problem solver at none against Physics Flashcards & Quiz's 3. Problem solver also leads on iOS requirement (8.0 vs 15.1). Physics Flashcards & Quiz's advantage is ads (none vs shown) and update cadence (every 2 months vs every 6 months). On price and device support there is nothing between them.

Both are free to download. Physics Flashcards & Quiz sells 3 in-app purchases, starting at $4.99 per 7 days. Problem solver asks for nothing beyond the download.

Problem solver ships an update every 6 months, Physics Flashcards & Quiz every 2 months. The most recent releases landed on May 16, 2026 and March 17, 2026 respectively.

## The numbers

| Metric | Problem solver | Physics Flashcards & Quiz |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 2 months** |
| Size | 10 MB | 39 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fabio Giuliani](https://appshunter.io/developer/1333671865) | [Alicsystems Information Technology Limited](https://appshunter.io/developer/1793437899) |

## What reviewers say

### Problem solver

[App page](https://appshunter.io/ios/app/problem-solver-mechanics/id1435700320)

**Features:** macOS Compatibility

**In-app purchases:** none


### Physics Flashcards & Quiz

[App page](https://appshunter.io/ios/app/physics-flashcards-and-quiz/id6753728195)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $4.99 | per 7 days |
| Pro Monthly | $9.99 | per month |
| Pro Yearly | $29.99 | per year |


## Frequently asked questions

### Is Problem solver free?

Problem solver is free to download, with no in-app purchases.

### Is Physics Flashcards & Quiz free?

Physics Flashcards & Quiz is free to download, with in-app purchases available.

### Do Problem solver or Physics Flashcards & Quiz have ads?

Problem solver shows ads; Physics Flashcards & Quiz does not.

### Which is updated more often, Problem solver or Physics Flashcards & Quiz?

Problem solver ships an update every 6 months, and Physics Flashcards & Quiz every 2 months. Most recently, Problem solver was updated on May 16, 2026 and Physics Flashcards & Quiz on March 17, 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.*