# e vs Biochemistry Tutoring

The clearest difference is in-app purchases: e at none against Biochemistry Tutoring's 1. e also leads on iOS requirement (14.4 vs 17.0). Biochemistry Tutoring's advantage is update cadence (fortnightly vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Biochemistry Tutoring sells 1 one-off in-app purchase. e asks for nothing beyond the download.

e ships an update every 4 months, Biochemistry Tutoring fortnightly. The most recent releases landed on November 7, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | e | Biochemistry Tutoring |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Size | 1 MB | 43 MB |
| Requires iOS | **14.4** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [e LEA Technologies Sp. z o.o.](https://appshunter.io/developer/1244166172) | [David Soulsby](https://appshunter.io/developer/1776367161) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-lea/id1539991332)

**Features:** macOS Compatibility

**In-app purchases:** none


### Biochemistry Tutoring

[App page](https://appshunter.io/ios/app/biochemistry-tutoring/id6790245930)

**Features:** iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Biochemistry Topics | $4.99 | one-time |


## Frequently asked questions

### Is e free?

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

### Is Biochemistry Tutoring free?

Biochemistry Tutoring is free to download, with in-app purchases available.

### Do e or Biochemistry Tutoring have ads?

Neither e nor Biochemistry Tutoring shows ads.

### Which is updated more often, e or Biochemistry Tutoring?

e ships an update every 4 months, and Biochemistry Tutoring fortnightly. Most recently, e was updated on November 7, 2026 and Biochemistry Tutoring on November 12, 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.*