Backside Attack vs Heterocycles
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Backside Attack
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.
- 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
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Backside Attack is an educational app targeting students learning organic chemistry for the first time. The game focuses on the SN2 reaction, which is often one of the first reactions students learn when studying organic chemistry. The SN2 reaction is great for educational purposes, as it provides a forum for students to learn about many common variables associated with chemical reactions, such as leaving group ability, nucleophilicity, steric factors, and solvent effects. The Backside Attack project is led by Dr. Neil Garg, an organic chemistry Professor at UCLA. He and six UCLA students (now alumni) devoted countless hours to creating the game flow and all content. The heroic students are: Tara Kappel, Preeya Mehta, William Parsons Stefan Prisacaru, Ernst Schmid, and Justin Soffer. Backside Attack is powered by Element26, Inc., thanks to Dr. Daniel D. Caspi. Students, be sure to: Learn even more and earn points by using the Check Yourself +50 feature on the scoring screen! Unlock the Chem Yourself feature by completing each topic!
Heterocycles
Master the names and applications of organic chemistry's heterocycles. This interactive app covers over 75 compounds with hundreds of examples and personalized review modes. Track your progress with achievements and learn about their roles in medicine and biology.
- 75+ heterocycles
- Hundreds of examples
- Multiple practice modes
- Personalized review
- Reference table
- Achievements
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Learn the names of heterocycles - all in an engaging and interactive format. If you’re puzzled by pyridines, quizzical about quinazolines, or interested in indolines, look no further. You’ll quickly become familiar with the most important nitrogen-, oxygen-, and sulfur-containing heterocycles, along with their applications in medicinal chemistry, biology, and beyond. The app features: • 75+ simple and advanced heterocycles • Hundreds of examples • Multiple practice modes • Personalized review • Reference table and definitions • Achievements to track your progress Along the way, you’ll learn interesting facts about pharmaceuticals, biomolecules, dangerous compounds, unique molecular structures, and more. Give it a try and let us know what you think!
Screenshots
Verdict
The clearest difference is in-app purchases: Backside Attack at none against Heterocycles's 1. Backside Attack also leads on ratings volume (74 vs 2) and iOS requirement (9.0 vs 15.0). On price, rating, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Heterocycles sells 1 one-off in-app purchase. Backside Attack asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for Backside Attack against 5.0 for Heterocycles. That said, the two scores are not equally well evidenced: Backside Attack has 74 ratings behind it against 2, so its average is the more settled of the two.
Backside Attack ships an update every 8 months, Heterocycles every 11 months. The most recent releases landed on July 4, 2026 and September 13, 2026 respectively.
| Parameter | Backside Attack | Heterocycles |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (74 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 95.5% of reviews | — |
| Number of ratings | 74 — better | 2 |
| Update frequency | Every 8 months — better | Every 11 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 178 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Element26, Inc. | Clarity Applications |
Customer experience
Backside Attack
Heterocycles
In-app purchases
Backside Attack
No in-app purchases
Heterocycles
- Lifetime Access$4.99
Questions
Is Backside Attack free?
Is Heterocycles free?
Which has better reviews, Backside Attack or Heterocycles?
Do Backside Attack or Heterocycles have ads?
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