# Functional Groups vs Off The Devices

The clearest difference is in-app purchases: Off The Devices at none against Functional Groups's 1. Off The Devices also leads on update cadence (every 9 days vs every 4 months). Functional Groups's advantage is ratings volume (21 vs 4). On price, rating, ads and device support there is nothing between them.

Both are free to download. Functional Groups sells 1 one-off in-app purchase. Off The Devices asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Functional Groups against 5.0 for Off The Devices. That said, the two scores are not equally well evidenced: Functional Groups has 21 ratings behind it against 4, so its average is the more settled of the two.

Functional Groups ships an update every 4 months, Off The Devices every 9 days. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Functional Groups | Off The Devices |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (21 ratings)](https://appshunter.io/ios/app/functional-groups/id1670252638/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/off-the-devices/id6744638254/reviews)** |
| Number of ratings | **21** | 4 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 28 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Clarity Applications](https://appshunter.io/developer/1646120472) | [DMB Equipment LLC](https://appshunter.io/developer/1833537798) |

## 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 |


### Off The Devices

[App page](https://appshunter.io/ios/app/off-the-devices/id6744638254)

This app helps schools manage student device usage during school hours. It uses geofencing and school Wi-Fi to remind students to power down or enable 'school mode' on their devices. Administrators can track student compliance and send notifications.

**Highlights:** Student device compliance tracking, Geofencing for school zones, School Wi-Fi integration, Administrator notifications, School Mode activation, Student reporting

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Functional Groups free?

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

### Is Off The Devices free?

Off The Devices is free to download, with no in-app purchases.

### Which has better reviews, Functional Groups or Off The Devices?

Off The Devices is rated higher. Functional Groups averages 4.9 out of 5 from 21 ratings, while Off The Devices averages 5.0 from 4 ratings.

### Do Functional Groups or Off The Devices have ads?

Neither Functional Groups nor Off The Devices shows ads.

### Which is updated more often, Functional Groups or Off The Devices?

Functional Groups ships an update every 4 months, and Off The Devices every 9 days. Most recently, Functional Groups was updated on October 11, 2026 and Off The Devices on October 10, 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.*