# Functional Groups vs Hormones Guide...

The clearest difference is ads: Functional Groups at none against Hormones Guide...'s shown. Hormones Guide...'s advantage is update cadence (every 2 weeks vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Functional Groups sells 1 one-off in-app purchase and Hormones Guide... sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Functional Groups ships an update every 4 months, Hormones Guide... every 2 weeks. The most recent releases landed on September 13, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Functional Groups | Hormones Guide... |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (21 ratings)](https://appshunter.io/ios/app/functional-groups/id1670252638/reviews)** | — |
| Number of ratings | **21** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 157 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Clarity Applications](https://appshunter.io/developer/1646120472) | [Olga Ivanova](https://appshunter.io/developer/1733570435) |

## What reviewers say

### Functional Groups

[App page](https://appshunter.io/ios/app/functional-groups/id1670252638)

Master organic chemistry functional groups through an engaging and interactive learning experience. Ideal for students in introductory or advanced courses, MCAT prep, and A-Level chemistry, this app covers dozens of essential groups with practice modes and progress tracking.

**Highlights:** 25+ basic and advanced functional groups, 300+ organic compounds, Multiple practice modes, Customizable study groups, Personalized review, Reference table and definitions, Progress tracking with achievements

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $9.99 | one-time |


### Hormones Guide...

[App page](https://appshunter.io/ios/app/hormones-guide/id6739848653)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription | $2.99 | per month |
| Sponsorship (donation) | $1.99 | one-time |


## Frequently asked questions

### Is Functional Groups free?

Functional Groups is free to download, with in-app purchases available.

### Is Hormones Guide... free?

Hormones Guide... is free to download, with in-app purchases available.

### Do Functional Groups or Hormones Guide... have ads?

Hormones Guide... shows ads; Functional Groups does not.

### Which is updated more often, Functional Groups or Hormones Guide...?

Functional Groups ships an update every 4 months, and Hormones Guide... every 2 weeks. Most recently, Functional Groups was updated on September 13, 2026 and Hormones Guide... on September 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.*