Comparison

Backside Attack vs Functional Groups

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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!

About

Functional Groups

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
Read full description

Ready to ace organic chemistry? Learn the functional groups you need to know - all in an engaging and interactive format. The app is ideal for introductory or advanced organic chemistry classes, MCAT prep, A-Level chemistry, and more. You’ll quickly become familiar with alcohols, esters, amides, amines, and dozens of other important functional groups. The app features: • 25+ basic and advanced functional groups • 300+ organic compounds • Multiple practice modes • Customize which groups to study • 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. With the Functional Groups app, learning organic chemistry is easy, straightforward, and, dare we say… fun? Give it a try and let us know what you think!

Screenshots

Backside Attack4 screens
Functional Groups4 screens

Verdict

The call

The clearest difference is in-app purchases: Backside Attack at none against Functional Groups's 1. Backside Attack also leads on ratings volume (74 vs 21) and iOS requirement (9.0 vs 15.0). On price, rating, review sentiment and update cadence 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Backside Attack against 4.9 for Functional Groups. Both are backed by a comparable volume of ratings — 74 and 21 respectively. Written reviews are what separate them: 95% of Backside Attack's written reviews are positive against 100% of Functional Groups's.

UpkeepUpdate frequency

Backside Attack ships an update every 8 months, Functional Groups every 4 months. The most recent releases landed on July 4, 2026 and September 13, 2026 respectively.

Scorecard4 real differences · 6 level
Backside Attack versus Functional Groups: the parameters behind the verdict, then further details
ParameterBackside AttackFunctional Groups
PriceFreeFree
Rating4.9 (74 ratings)4.9 (21 ratings)
Positive reviews95.5% of reviews100.0% of reviews — better
Number of ratings74 — better21
Update frequencyEvery 8 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS9.0 — better15.0
Further details — not scored
Size178 MB17 MB
Age rating4+4+
DeveloperElement26, Inc.Clarity Applications

Customer experience

Backside Attack

All ratings74 ratings
Positive98.6%
Neutral0.0%
Negative1.4%
Written reviews22 reviews
Positive95.5%
Neutral0.0%
Negative4.5%

Functional Groups

All ratings21 ratings
Positive95.2%
Neutral4.8%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Backside Attack

No in-app purchases

1 purchases

Functional Groups

One-time1
  • Lifetime Access$9.99

Questions

Is Backside Attack free?
Backside Attack is free to download, with no in-app purchases.
Is Functional Groups free?
Functional Groups is free to download, with in-app purchases available.
Which has better reviews, Backside Attack or Functional Groups?
Backside Attack and Functional Groups are both rated 4.9 out of 5 on the App Store, from 74 and 21 ratings respectively.
Do Backside Attack or Functional Groups have ads?
Neither Backside Attack nor Functional Groups shows ads.
Which is updated more often, Backside Attack or Functional Groups?
Backside Attack ships an update every 8 months, and Functional Groups every 4 months. Most recently, Backside Attack was updated on July 4, 2026 and Functional Groups on September 13, 2026.

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