Comparison

Codon One vs StoPify

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

StoPify

Features
Read full description

Enhance your air quality and minimize health risks with StoPify. Breathe confidently knowing you're managing your environment effectively. StoPify provides you with a risk profile, offering a visual representation of health risk assessment under the conditions you specify for your room. You have the flexibility to adjust variables to shape your profile control according to your preferences. It serves solely as an informational and educational tool, empowering users to prioritize clean air conditions and foster a comfortable and healthier environment.

Screenshots

Codon One4 screens
StoPify4 screens

Verdict

The call

The clearest difference is update cadence: StoPify at weekly against Codon One's every 3 weeks. Codon One's advantage is iOS requirement (15.6 vs 17.2). On price, ads, in-app purchases 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 and StoPify sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Codon One ships an update every 3 weeks, StoPify weekly. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Codon One versus StoPify: the parameters behind the verdict, then further details
ParameterCodon OneStoPify
PriceFreeFree
Rating4.5 (25 ratings) — better—
Positive reviews76.5% of reviews—
Number of ratings25 — better—
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.2
Further details — not scored
Size277 MB3 MB
Age rating4+4+
DeveloperDaniel GebertYoshikazu Mikawa

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
1 purchases

StoPify

One-time1
  • StoPify Premium Access$0.99

Questions

Is Codon One free?
Codon One is free to download, with in-app purchases available.
Is StoPify free?
StoPify is free to download, with in-app purchases available.
Do Codon One or StoPify have ads?
Neither Codon One nor StoPify shows ads.
Which is updated more often, Codon One or StoPify?
Codon One ships an update every 3 weeks, and StoPify weekly. Most recently, Codon One was updated on October 27, 2026 and StoPify on October 25, 2026.

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