Codon: Learn Biology
Molecules to ecosystems
About
Master biology from molecules to ecosystems with a comprehensive, offline curriculum. Explore 100 lessons, researcher profiles, and landmark experiments. Learn mechanisms and track progress with spaced repetition and interactive quizzes.
What's New in Codon
1.1
August 27, 2026
Practice questions have been rewritten so the correct answer can no longer be identified from its shape. Options within a question now share the same form, length and structure, so the right answer has to be recognised rather than guessed. Question wording and explanations were reviewed alongside it.
MoreIn-App Purchases
$9.99
Codon Full Access
Unlocks the remaining 90 lessons and all extras.
Developer apps
FAQ
What is Codon's learning methodology?
Codon focuses on teaching biological mechanisms rather than just vocabulary. It provides detailed explanations for concepts like cellular respiration, offering precise figures and reasoning behind them, and presents competing scientific accounts for unsettled areas of study.
How much does Codon cost?
The first ten lessons of Codon are available for free. A one-time purchase of $9.99 unlocks the remaining 90 lessons and all other content permanently. There are no subscriptions or ads.
Does Codon have ads?
No, Codon is designed to be ad-free. The app explicitly states that there are no advertisements, ensuring an uninterrupted learning experience.
Can I use Codon offline?
Yes, Codon is designed for offline use. All lessons, profiles, glossary terms, quizzes, and case studies are bundled within the app download, allowing it to function fully in airplane mode without any network connection.
What devices does Codon support?
Codon is supported on iPhone and iPad devices. It is designed to work seamlessly across Apple's mobile operating systems.
How often is Codon updated?
The latest version of Codon is 1.1, which was last updated on August 27, 2026. This indicates a recent update, suggesting ongoing development and support for the application.
What age rating does Codon have?
Codon has an age rating of 12+. This suggests it is suitable for users aged 12 and above, covering content appropriate for middle school and high school biology curricula.
Does Codon offer certifications?
The provided information does not mention whether Codon offers any formal certifications upon completion of its curriculum. Its focus is on delivering comprehensive educational content for learning.