# R2R vs PAT

The clearest difference is review sentiment: R2R at 75% against PAT's 28%. R2R also leads on rating (4.7 vs 3.7) and in-app purchases (none vs 3). PAT's advantage is update cadence (monthly vs every 5 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. PAT sells 3 in-app purchases, starting at $9.99 per month. R2R asks for nothing beyond the download.

R2R holds the better App Store score, 4.7 against 3.7. Both are backed by a comparable volume of ratings — 124 and 62 respectively. Written reviews point the same way: 75% of R2R's written reviews are positive against 28% of PAT's.

R2R ships an update every 5 months, PAT monthly. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | R2R | PAT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (124 ratings)](https://appshunter.io/ios/app/r2r-functional-groups/id1225511399/reviews)** | [3.7 (62 ratings)](https://appshunter.io/ios/app/pat-dat-score-booster/id1497045418/reviews) |
| Number of ratings | **124** | 62 |
| Positive reviews | **75.0% of reviews** | 27.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 57 MB | 36 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [James Styles](https://appshunter.io/developer/1537953716) | [DAT Prep LLC](https://appshunter.io/developer/1497045417) |

## What reviewers say

### R2R

[App page](https://appshunter.io/ios/app/r2r-functional-groups/id1225511399)

Learn and practice organic chemistry functional groups with interactive lessons and timed challenges. This app is designed for A-Level Chemistry students to prepare for exams and competitions.

**Highlights:** Learn functional groups, Practice with R-Groups, Timed challenges, Review different groups, Prepare for exams

**In-app purchases:** none


### PAT

[App page](https://appshunter.io/ios/app/pat-dat-score-booster/id1497045418)

Prepare for the DAT's Perceptual Ability Test with a comprehensive practice tool. Access unlimited practice questions, video tutorials for specific question types, and full-length practice tests to boost your score. This app aims to help students achieve a 23+ on the PAT section.

**Highlights:** Unlimited practice questions, Video tutorials for PAT question types, Full-length practice tests, Score guarantee, Practice for Keyholes, Top-Front-End, Angle Ranking, Hole Punching, Cube Counting, and Pattern Folding

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PAT Lite | $9.99 | per month |
| PAT Standard | $49.99 | per 6 months |
| PAT Ultimate | $79.99 | per year |


## Frequently asked questions

### Is R2R free?

R2R is free to download, with no in-app purchases.

### Is PAT free?

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

### Which has better reviews, R2R or PAT?

R2R is rated higher. R2R averages 4.7 out of 5 from 124 ratings, while PAT averages 3.7 from 62 ratings.

### Do R2R or PAT have ads?

Neither R2R nor PAT shows ads.

### Which is updated more often, R2R or PAT?

R2R ships an update every 5 months, and PAT monthly. Most recently, R2R was updated on October 5, 2026 and PAT 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.*