Comparison

Codon One vs Structural Formulas Study

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

Head to head
About

Codon One

Master molecular biology, genetics, evolution, and life chemistry through interactive modules and quizzes. Explore essential concepts with clear diagrams and concise explanations. Includes helpful tools for sequence analysis and genetic code reference.

Highlights
  • Interactive learning modules
  • Quick quizzes for comprehension
  • Clear diagrams and plain language
  • Molecule reference guide
  • Sequence analysis tools
  • Genetic code exploration
Features
Read full description

Codon One helps you learn biology step by step, with short lessons, quick quizzes, flashcards, and a searchable glossary. Build a solid foundation in molecular biology, genetics, evolution, cell biology, development, and the history of science. Each section breaks complex ideas into clear explanations, diagrams, and focused checks for understanding. Core course (Modules) Module 1: Chemistry of Life – atoms & elements, bonds, water, pH, biomolecules Module 2: Genetics – chromosomes, replication, transcription, translation, regulation Module 3: Evolution – history of life, phylogeny, selection, drift, speciation, molecular evolution Module 4: History of Science – ideas, methods, and experiments that shaped modern biology Module 5: Cell Biology – membranes & transport, organelles & energy, cytoskeleton, signaling, cell division Module 6: Development – fertilization & body plans, differentiation, pattern formation & morphogenesis, growth & repair, evo-devo Additional topics are planned for future updates, including Animal Physiology, Microbiology & Immunology, Plant Biology, and more. Glossary & Flashcards Look up the essentials in one place - key terms from every module, plus the 20 amino acids and the nucleobases. Turn any topic into a flashcard deck and review with smart, spaced practice that focuses on the cards you find hardest. Quiz & Progress Practice across biochemistry, genetics, evolution, cell biology, development, and science history in a dedicated quiz area. Track improvement with success rates and per-topic stats, and let the app resurface your weak questions for targeted review. Keep a daily streak going to build a steady habit. Got a good question? Submit it directly from the app. Built-in Tools Sequence Operator: paste DNA, reverse or complement it, transcribe to RNA, translate in all six reading frames, and view length, GC content, and melting temperature. Codon Picker: explore the genetic code, see which codons map to each amino acid or stop signal, and tweak bases to see the effect. Triplet Encoder: write a message in amino-acid single-letter code and encode it as a DNA triplet sequence, then decode it by translation. Found a bug or have suggestions? Email info@codon-one.com - we read every message.

About

Structural Formulas Study

Explore and study over 100 molecular structures with detailed properties and clear diagrams. This app offers quick search and filtering for efficient exam preparation and daily learning, with offline access available.

Highlights
  • 100+ molecular structures
  • Detailed structural formulas
  • Essential chemical properties
  • Quick search and filters
  • Offline access
  • Exam preparation tool
Features
Read full description

Learn chemistry the easy way. Explore, search, and filter over 100 molecular structures with clear diagrams and essential data — perfect for exam prep or daily study. Features - 100+ molecules - Structural formulas with detailed properties (mass, density, pKa, etc.) - Quick search & category filters - Offline access – no internet required - Ideal for high school & college chemistry students Make chemistry study simple, efficient, and always at your fingertips!

Screenshots

Codon One4 screens
Structural Formulas Study4 screens

Verdict

The call

The clearest difference is rating: Structural Formulas Study at 5.0 against Codon One's 4.5. Structural Formulas Study also leads on in-app purchases (none vs 7). Codon One's advantage is ratings volume (25 vs 1) and update cadence (every 3 weeks vs every 5 weeks). On price, ads and device support 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. Codon One sells 7 one-off in-app purchases. Structural Formulas Study asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Structural Formulas Study holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Codon One has 25 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Codon One ships an update every 3 weeks, Structural Formulas Study every 5 weeks. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.

Scorecard6 real differences · 4 level
Codon One versus Structural Formulas Study: the parameters behind the verdict, then further details
ParameterCodon OneStructural Formulas Study
PriceFreeFree
Rating4.5 (25 ratings)5.0 (1 ratings) — better
Positive reviews76.5% of reviews—
Number of ratings25 — better1
Update frequencyEvery 3 weeks — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better18.4
Further details — not scored
Size277 MB5 MB
Age rating4+4+
DeveloperDaniel GebertJun Yamabe

Customer experience

Codon One

All ratings25 ratings
Positive84.0%
Neutral8.0%
Negative8.0%
Written reviews17 reviews
Positive76.5%
Neutral0.0%
Negative23.5%

Structural Formulas Study

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

7 purchases

Codon One

One-time7
  • Module 2: GeneticsFree
  • Module 1: Chemistry of LifeFree
  • Module 3: Evolution$2.99
Show 4 more
  • Module 4: Science History$2.99
  • Module 5: Cell Biology$2.99
  • Module 6: Development$2.99
  • Unlock All$8.99
None

Structural Formulas Study

No in-app purchases

Questions

Is Codon One free?
Codon One is free to download, with in-app purchases available.
Is Structural Formulas Study free?
Structural Formulas Study is free to download, with no in-app purchases.
Which has better reviews, Codon One or Structural Formulas Study?
Structural Formulas Study is rated higher. Codon One averages 4.5 out of 5 from 25 ratings, while Structural Formulas Study averages 5.0 from 1 ratings.
Do Codon One or Structural Formulas Study have ads?
Neither Codon One nor Structural Formulas Study shows ads.
Which is updated more often, Codon One or Structural Formulas Study?
Codon One ships an update every 3 weeks, and Structural Formulas Study every 5 weeks. Most recently, Codon One was updated on November 7, 2026 and Structural Formulas Study on November 8, 2026.

Other comparisons