Gradescope vs Codon
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gradescope
Easily upload assignments for courses using this app. Submit files from your device or scan your work directly. Assign pages for variable-length assignments and resubmit if needed before the deadline.
- Upload assignments
- Scan documents with camera
- Select existing files
- Assign pages for variable-length assignments
- Resubmit assignments
- View submitted and graded assignments
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Students, upload your assignments to Gradescope more easily than ever before! If your instructor uses Gradescope for your assignments, you can now upload your submission with our mobile app. After installing and opening the app, login to see your Gradescope courses and assignments. To upload a submission, click on the assignment in the “Not Submitted” tab and either “Select File” to select an existing file from your device or “Scan” all pages of your completed work using your iPhone’s camera. Once you submit your file(s), for templated assignments, you’re all set. For variable-length assignments, “Assign pages” to indicate where your answer for each question appears within your submission. It’s that easy! After confirming, your assignment then moves to the “Submitted” tab. If needed, you can resubmit your assignment until the due date your instructor set has passed. Once it is graded and grades are published for the assignment, it then moves to the “Graded” tab. Note: For V1 of the app, you will be directed to our mobile website for any advanced functionality, including viewing feedback and submitting timed, programming, or online assignments. Stay tuned for future updates that will allow you to do even more with our mobile app!
Codon
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.
- Offline biology curriculum
- 100 lessons with narration
- Researcher profiles
- Interactive quizzes with explanations
- Spaced repetition learning
- Offline access, no account needed
- Home screen widgets
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A four-year biology curriculum, offline, with no account and no network. Codon covers what an introductory sequence and the first two years of a degree teach: molecules and cells first, then inheritance and molecular biology, then evolution, diversity and ecology, then whole organisms and physiology. WHAT IS INSIDE 100 lessons across four years, each 15 to 25 minutes, with on-device narration 60 researcher profiles, from Mendel and Darwin to McClintock and Doudna 735 glossary terms, cross-linked to the lessons that use them 20 quizzes with worked explanations for every answer 18 landmark experiments reconstructed: Meselson and Stahl, Hershey and Chase, Luria and Delbruck Spaced repetition that schedules the terms you keep forgetting Bookmarks and notes on any lesson, profile or term Three Home Screen widgets: a quote, a term and a figure, each changing daily HOW IT TEACHES The course teaches mechanisms rather than vocabulary. Where a textbook says respiration yields 38 ATP, this one gives the real figure of roughly 30 to 32 and explains why the number moved. Where the field is unsettled, such as the origin of eukaryotes or the tempo of speciation, the lesson gives the competing accounts and who holds them. FREE AND PAID The first ten lessons are free. One purchase of $9.99 unlocks the remaining 90 and everything else, permanently. There is no subscription, there are no ads, and there is no account to create. Family Sharing is supported. OFFLINE BY DESIGN The app makes no network connections. Every lesson, profile, glossary entry, quiz and case study is bundled in the download, so the whole course works in airplane mode. Nothing you read or write here leaves your device.
Screenshots
Verdict
The clearest difference is rating: Codon at 5.0 against Gradescope's 1.4. Codon also leads on update cadence (every 10 days vs every 2 months). Gradescope's advantage is in-app purchases (none vs 1) and ratings volume (259 vs 1). 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
Both are free to download. Codon sells 1 one-off in-app purchase. Gradescope asks for nothing beyond the download.
Codon holds the better App Store score, 5.0 against 1.4. That said, the two scores are not equally well evidenced: Gradescope has 259 ratings behind it against 1, so its average is the more settled of the two.
Gradescope ships an update every 2 months, Codon every 10 days. The most recent releases landed on September 30, 2026 and September 22, 2026 respectively.
| Parameter | Gradescope | Codon |
|---|---|---|
| Price | Free | Free |
| Rating | 1.4 (259 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 9.1% of reviews | — |
| Number of ratings | 259 — better | 1 |
| Update frequency | Every 2 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Best chart rank | #85 — better | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 37 MB | 5 MB |
| Age rating | 4+ | 12+ |
| Developer | Turnitin | OMAR DANIEL GRAZIANO |
Customer experience
Gradescope
Codon
Bugs and requests
Gradescope
Reported bugs
3 issues- Camera flash issues during scanning
- Photos not uploading in correct order
- Inconsistent download button behavior
Requested features
3 requests- Ability to sort assignments by due date
- Integration of tools for instructors
- Improved iPad and tablet optimization
Codon
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Gradescope
No in-app purchases
Codon
- Codon Full Access$9.99








