# Physics Questions vs SteamWater

The clearest difference is in-app purchases: SteamWater at none against Physics Questions's 9. SteamWater also leads on ads (none vs shown). Physics Questions's advantage is update cadence (every 4 days vs every 6 weeks) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Physics Questions sells 9 one-off in-app purchases. SteamWater asks for nothing beyond the download.

Physics Questions ships an update every 4 days, SteamWater every 6 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Physics Questions | SteamWater |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Every 6 weeks |
| Size | 20 MB | 3 MB |
| Requires iOS | **12.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Michael Todd](https://appshunter.io/developer/1211079532) | [Salvador Huertas](https://appshunter.io/developer/1796699694) |

## 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 |


### SteamWater

[App page](https://appshunter.io/ios/app/steamwater/id6742078820)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Physics Questions free?

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

### Is SteamWater free?

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

### Do Physics Questions or SteamWater have ads?

Physics Questions shows ads; SteamWater does not.

### Which is updated more often, Physics Questions or SteamWater?

Physics Questions ships an update every 4 days, and SteamWater every 6 weeks. Most recently, Physics Questions was updated on October 27, 2026 and SteamWater on October 25, 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.*