# PE.Mech vs Biomolecules

The clearest difference is price: Biomolecules at Free against PE.Mech's $0.99. Biomolecules also leads on update cadence (every 2 weeks vs every 2 months) and device support (3 vs 1). PE.Mech's advantage is ads (none vs shown). On in-app purchases and iOS requirement there is nothing between them.

Biomolecules is free to download; PE.Mech costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PE.Mech ships an update every 2 months, Biomolecules every 2 weeks. The most recent releases landed on September 30, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | PE.Mech | Biomolecules |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/biomoleculesfunctional-groups/id6446133302/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | — | Ad-supported |
| Size | 35 MB | 158 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [巍 顾](https://appshunter.io/developer/1368599824) | [Carolina Biological Supply](https://appshunter.io/developer/413708533) |

## What reviewers say

### PE.Mech

[App page](https://appshunter.io/ios/app/pemech/id1368599825)

**Features:** macOS Compatibility

**In-app purchases:** none


### Biomolecules

[App page](https://appshunter.io/ios/app/biomoleculesfunctional-groups/id6446133302)

Explore the properties and functions of biomolecules with this educational app. It covers basic chemistry topics essential for understanding biological molecules and their processes. This is part of a series designed for anyone interested in general, organic, and biological chemistry.

**Highlights:** Learn basic chemistry topics, Explore biomolecule properties, Understand biomolecule functions, Study general chemistry, Study organic chemistry, Study biological chemistry

**In-app purchases:** none


## Frequently asked questions

### Is PE.Mech free?

PE.Mech costs $0.99, with no in-app purchases.

### Is Biomolecules free?

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

### Do PE.Mech or Biomolecules have ads?

Biomolecules shows ads; PE.Mech does not.

### Which is updated more often, PE.Mech or Biomolecules?

PE.Mech ships an update every 2 months, and Biomolecules every 2 weeks. Most recently, PE.Mech was updated on September 30, 2026 and Biomolecules on September 17, 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.*