# Backside Attack vs iORA

The clearest difference is update cadence: iORA at every 2 months against Backside Attack's every 8 months. Backside Attack's advantage is ratings volume (74 vs 12) and iOS requirement (9.0 vs 14.3). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for Backside Attack against 5.0 for iORA. That said, the two scores are not equally well evidenced: Backside Attack has 74 ratings behind it against 12, so its average is the more settled of the two. Written reviews are what separate them: 95% of Backside Attack's written reviews are positive against 100% of iORA's.

Backside Attack ships an update every 8 months, iORA every 2 months. The most recent releases landed on July 4, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Backside Attack | iORA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (74 ratings)](https://appshunter.io/ios/app/backside-attack/id1278956096/reviews) | **[5.0 (12 ratings)](https://appshunter.io/ios/app/iora-reaction-visualizer/id1609524913/reviews)** |
| Number of ratings | **74** | 12 |
| Positive reviews | 95.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 178 MB | 40 MB |
| Requires iOS | **9.0** | 14.3 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Element26, Inc.](https://appshunter.io/developer/973213639) | [Daniel Ess](https://appshunter.io/developer/1609524915) |

## What reviewers say

### Backside Attack

[App page](https://appshunter.io/ios/app/backside-attack/id1278956096)

This educational game helps students grasp fundamental organic chemistry concepts, specifically focusing on the SN2 reaction. It explores key variables like leaving group ability, nucleophilicity, steric factors, and solvent effects to build a strong foundation in chemistry.

**Highlights:** Learn SN2 reaction mechanics, Explore leaving group ability, Understand nucleophilicity, Analyze steric factors, Study solvent effects, Earn points with Check Yourself +50, Unlock Chem Yourself feature

**In-app purchases:** none


### iORA

[App page](https://appshunter.io/ios/app/iora-reaction-visualizer/id1609524913)

Visualize chemical reactions in 3D using quantum-mechanical simulations. This free, interactive application makes complex chemistry concepts accessible and engaging for learners.

**Highlights:** 3D chemical reaction visualization, Quantum-mechanical simulations, Interactive learning, Easy to use interface, Educational tool

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Backside Attack free?

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

### Is iORA free?

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

### Which has better reviews, Backside Attack or iORA?

iORA is rated higher. Backside Attack averages 4.9 out of 5 from 74 ratings, while iORA averages 5.0 from 12 ratings.

### Do Backside Attack or iORA have ads?

Neither Backside Attack nor iORA shows ads.

### Which is updated more often, Backside Attack or iORA?

Backside Attack ships an update every 8 months, and iORA every 2 months. Most recently, Backside Attack was updated on July 4, 2026 and iORA on September 7, 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.*