# Ex Libris Events vs Physics Questions

The clearest difference is in-app purchases: Ex Libris Events at none against Physics Questions's 9. Ex Libris Events also leads on ads (none vs shown). Physics Questions's advantage is update cadence (every 4 days vs every 3 months) and iOS requirement (12.0 vs 16.0). On price and device support there is nothing between them.

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

Ex Libris Events ships an update every 3 months, Physics Questions every 4 days. The most recent releases landed on September 10, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Ex Libris Events | Physics Questions |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 4 days** |
| Size | 72 MB | 20 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Ex Libris LTD](https://appshunter.io/developer/1095433456) | [Michael Todd](https://appshunter.io/developer/1211079532) |

## What reviewers say

### Ex Libris Events

[App page](https://appshunter.io/ios/app/ex-libris-events/id1446614436)

**Features:** Apple Wallet

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Ex Libris Events free?

Ex Libris Events is free to download, with no in-app purchases.

### Is Physics Questions free?

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

### Do Ex Libris Events or Physics Questions have ads?

Physics Questions shows ads; Ex Libris Events does not.

### Which is updated more often, Ex Libris Events or Physics Questions?

Ex Libris Events ships an update every 3 months, and Physics Questions every 4 days. Most recently, Ex Libris Events was updated on September 10, 2026 and Physics Questions on September 19, 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.*