# Physics Bytes vs El

The clearest difference is update cadence: El at every 3 weeks against Physics Bytes's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Physics Bytes ships an update every 6 months, El every 3 weeks. The most recent releases landed on September 25, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Physics Bytes | El |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Size | 200 MB | 54 MB |
| Requires iOS | 15.2 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ibrahim el refaey](https://appshunter.io/developer/1627473294) | [Ibrahim Sayed](https://appshunter.io/developer/1887681640) |

## What reviewers say

### Physics Bytes

[App page](https://appshunter.io/ios/app/physics-bytes/id6749237269)

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

**In-app purchases:** none


### El

[App page](https://appshunter.io/ios/app/el-booklets/id6761079894)

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

**In-app purchases:** none


## Frequently asked questions

### Is Physics Bytes free?

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

### Is El free?

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

### Do Physics Bytes or El have ads?

Neither Physics Bytes nor El shows ads.

### Which is updated more often, Physics Bytes or El?

Physics Bytes ships an update every 6 months, and El every 3 weeks. Most recently, Physics Bytes was updated on September 25, 2026 and El on October 15, 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.*