Comparison

R2R vs SynStrategy

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

Head to head
About

R2R

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
Read full description

Put the Fun in Functional Groups with Prof. Rudi Rabbit! Aimed at those studying ALevel Chemistry, this app is designed to help you learn the different functional groups that may come up in your examinations or extension competitions. Use the 'Learn' screen to review the different groups and how you tell them apart, 'Practice' with different R-Groups and then 'Play' and try and beat the professor under timed conditions. Once you have beaten the professor then you are ready for some of Race to Revise's other organic synthesis games.

About

SynStrategy

This app categorizes organic reactions by the functional groups they form, aiding chemists in synthetic analysis. It offers over 500 transformations and 400 synthesis examples, with detailed subdivisions for clarity.

Highlights
  • Reactions categorized by functional group
  • 27 main functional group categories
  • Over 500 transformations
  • Over 400 total synthesis examples
  • Subdivided functional group categories
  • Highlights synthetic use cases
Features
Read full description

SynStrategy is an organic chemistry app for anyone studying or working in organic synthesis. Its key feature is the categorization of named reactions and unnamed chemical reactions by the functional groups they form, helping students and practitioners navigate the vast landscape of organic transformations. The app features 27 main functional group categories, each further subdivided (for example, Alcohols include primary, secondary, tertiary, allylic, and homoallylic alcohols, and more). This structured organization gives chemists a clearer view of available transformations during synthetic and retrosynthetic analysis. SynStrategy currently includes over 500 organic chemistry reactions, with their synthetic use cases highlighted in more than 400 total synthesis examples. NEW: We've added the mechanisms for a collection of classic named oxidation reactions, with more to come. Each mechanism includes literature references you can look up for further detail. The first set covers the Albright-Goldman, Anelli, Babler-Dauben, Baeyer-Villiger, Ball-Goodwin-Morton, Collins, Corey-Gilman-Ganem, Corey-Kim, Corey-Schmidt, Corey-Suggs, Criegee, Dakin, Davis, Davis Asymmetric, and TEMPO oxidations. Beyond the reference library, SynStrategy includes interactive tools to help you study organic chemistry and organize these transformations. Save specific reactions into custom datasets that can be exported and shared with colleagues. Test your knowledge with the app's study modes: a Quiz system featuring three formats with multiple-choice and advanced questions on chemical reactions and total synthesis steps, plus a traditional Flashcard mode. Both modes include session analytics so you can track your progress. NEW: A Statistics dashboard now lets you review your quiz and flashcard results, see what you've studied, and get an overview of your activity in the app over time (More → Statistics). Whether you're preparing for an organic chemistry (orgo) exam, reviewing named reactions and mechanisms, or planning a synthesis in the lab, SynStrategy aims to be a useful organic chemistry companion. There are countless exceptional total syntheses and synthetically relevant methodologies in the literature, and we aim to grow the selection over time. Have a particular organic reaction or total synthesis example you'd like to see added? E-mail us: serviceofsynthesis@gmail.com Summary of Features: - Named and unnamed reactions, categorized by functional group - Over 500 organic chemistry transformations - Mechanisms for selected reactions (more to come) - Over 400 total synthesis examples - Create, export, and import custom reaction datasets - Multi-format Quiz system with session analytics - Dedicated Flashcard mode for systematic review - Statistics to review your results and activity in the app over time If you need support, please contact serviceofsynthesis@gmail.com

Screenshots

R2R4 screens
SynStrategy4 screens

Verdict

The call

The clearest difference is review sentiment: SynStrategy at 100% against R2R's 75%. SynStrategy also leads on rating (5.0 vs 4.7). R2R's advantage is ratings volume (124 vs 9) and device support (3 vs 1). On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

SynStrategy holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: R2R has 124 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 75% of R2R's written reviews are positive against 100% of SynStrategy's.

UpkeepUpdate frequency

R2R ships an update every 5 months, SynStrategy every 3 months. The most recent releases landed on September 17, 2026 and September 11, 2026 respectively.

Scorecard5 real differences · 5 level
R2R versus SynStrategy: the parameters behind the verdict, then further details
ParameterR2RSynStrategy
PriceFreeFree
Rating4.7 (124 ratings)5.0 (9 ratings) — better
Positive reviews75.0% of reviews100.0% of reviews — better
Number of ratings124 — better9
Update frequencyEvery 5 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS9.0 — better16.0
Further details — not scored
Size57 MB36 MB
Age rating4+4+
DeveloperJames StylesWilli M. Amberg

Customer experience

R2R

All ratings124 ratings
Positive93.5%
Neutral4.8%
Negative1.6%
Written reviews8 reviews
Positive75.0%
Neutral25.0%
Negative0.0%

SynStrategy

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

R2R

No in-app purchases

None

SynStrategy

No in-app purchases

Questions

Is R2R free?
R2R is free to download, with no in-app purchases.
Is SynStrategy free?
SynStrategy is free to download, with no in-app purchases.
Which has better reviews, R2R or SynStrategy?
SynStrategy is rated higher. R2R averages 4.7 out of 5 from 124 ratings, while SynStrategy averages 5.0 from 9 ratings.
Do R2R or SynStrategy have ads?
Neither R2R nor SynStrategy shows ads.
Which is updated more often, R2R or SynStrategy?
R2R ships an update every 5 months, and SynStrategy every 3 months. Most recently, R2R was updated on September 17, 2026 and SynStrategy on September 11, 2026.

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