# Physics Questions vs Critical Friend

The clearest difference is ads: Critical Friend at none against Physics Questions's shown. Critical Friend also leads on update cadence (every 2 days vs every 4 days). Physics Questions's advantage is iOS requirement (12.0 vs 26.2). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Physics Questions sells 9 one-off in-app purchases and Critical Friend sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

Physics Questions ships an update every 4 days, Critical Friend every 2 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Physics Questions | Critical Friend |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 days | **Every 2 days** |
| Size | 20 MB | 15 MB |
| Requires iOS | **12.0** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Michael Todd](https://appshunter.io/developer/1211079532) | [Matthew Phillips](https://appshunter.io/developer/1887048391) |

## What reviewers say

### Physics Questions

[App page](https://appshunter.io/ios/app/physics-questions/id1616961005)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Electricity Questions | $1.99 | one-time |
| Electronics Questions | $1.99 | one-time |
| Electromagnetism Questions | $1.99 | one-time |
| Force & Energy Questions | $1.99 | one-time |
| Motion Questions | $1.99 | one-time |
| Optics Questions | $1.99 | one-time |
| Radioactivity & Thermodynamics | $1.99 | one-time |
| Special Relativity Questions | $1.99 | one-time |
| Waves & Particles Questions | $1.99 | one-time |


### Critical Friend

[App page](https://appshunter.io/ios/app/critical-friend/id6760961503)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Critical Friend Premium | $5.99 | per month |
| 20 Extra Conversations | $2.99 | one-time |


## Frequently asked questions

### Is Physics Questions free?

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

### Is Critical Friend free?

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

### Do Physics Questions or Critical Friend have ads?

Physics Questions shows ads; Critical Friend does not.

### Which is updated more often, Physics Questions or Critical Friend?

Physics Questions ships an update every 4 days, and Critical Friend every 2 days. Most recently, Physics Questions was updated on November 3, 2026 and Critical Friend on October 31, 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.*