CellAtlas vs Thea
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CellAtlas
Explore blood cell morphology with expert-written lectures and a vast image database. Test your knowledge with an engaging quiz game designed for efficient learning.
- Blood cell morphology guide
- Expert-written mini lectures
- Extensive cell image database
- CellQuiz game
- Knowledge testing
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Welcome to the CellAtlas Application - your guide to blood cell morphology. CellAtlas contains mini lectures written by hematology experts complemented by an extensive cell image database. The App also includes a game, CellQuiz. A fun and efficient way to test your knowledge in cell morphology. CellAtlas is a product from the medical technology company CellaVision.
Thea
Transform your course materials into interactive study tools with an AI-powered platform. Upload notes, PDFs, or videos to generate flashcards, practice tests, and summaries. Learn efficiently and master your subjects with personalized study plans.
- AI-powered study material transformation
- Interactive flashcards and game modes
- Adaptive learning question generation
- Practice test simulation
- Automatic summarization and guide creation
- Multi-language support
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Feeling overwhelmed by lecture notes, textbook PDFs, and hours of video content? Stop juggling dozens of apps. Meet Thea.study, the all-in-one AI learning platform that transforms your course materials into powerful, interactive study tools in seconds. Reduce stress and save time with Thea, your smart study partner. We help you master your material efficiently, leaving more time for the things you love. Thea offers a powerful set of AI tools designed for personalized learning and better results. UPLOAD ANYTHING, STUDY INSTANTLY: Get started in seconds. Upload handwritten notes, PDFs, lecture videos, or even paste a YouTube link. Thea's AI extracts the key information and builds your personalized study kit. SMART STUDY: Move beyond rote memorization. Our AI-powered adaptive learning generates questions that focus on your weak spots, getting more challenging as you master the material. MEMORIZE FASTER: Use interactive flashcards and engaging game modes built on a proven spaced repetition system. Perfect for on-the-go learning that makes information stick. TEST WITH CONFIDENCE: Generate practice tests from your study materials to simulate the real exam environment. Build confidence and refine your strategy before exam day. SUMMARIZE & CREATE GUIDES: Instantly distill dense information into concise summaries. Generate comprehensive, downloadable study guides with a single click to simplify your revision process. DESIGNED FOR STUDENTS EVERYWHERE: With support for over 80 languages, you can learn and study in the language you're most comfortable with for better understanding. ACCESSIBLE ANYTIME, ANYWHERE: Thea works seamlessly across your computer, tablet, and smartphone. Your study companion goes wherever you do. A POWERFUL TOOL FOR EDUCATORS: Create classes, assign AI-generated study modules from your own teaching materials, and track student progress with our powerful analytics. Get Started in Seconds! Download Thea today and start achieving better results with less stress! EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of service: https://www.theastudy.com/termsofservice Privacy policy: https://www.theastudy.com/privacy
Screenshots
Verdict
The clearest difference is rating: Thea at 4.9 against CellAtlas's 3.2. Thea also leads on ratings volume (2.5K vs 22) and review sentiment (93% vs 84%). CellAtlas's advantage is in-app purchases (none vs 2). On price, update cadence, 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. Thea sells 2 in-app purchases, starting at $12.00 per month. CellAtlas asks for nothing beyond the download.
Thea holds the better App Store score, 4.9 against 3.2. That said, the two scores are not equally well evidenced: Thea has 2.5K ratings behind it against 22, so its average is the more settled of the two. Written reviews point the same way: 84% of CellAtlas's written reviews are positive against 93% of Thea's.
CellAtlas ships an update every 2 months, Thea monthly. The most recent releases landed on October 15, 2026 and October 17, 2026 respectively.
| Parameter | CellAtlas | Thea |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (22 ratings) | 4.9 (2.5K ratings) — better |
| Positive reviews | 84.3% of reviews | 93.0% of reviews — better |
| Number of ratings | 22 | 2.5K — better |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 106 MB | 4 MB |
| Age rating | 4+ | 12+ |
| Developer | CellaVision | Thea Study |
Customer experience
CellAtlas
Thea
User reviews
CellAtlas
From 22 App Store ratingsWhat we love
- 👍 Great for learning morphology
- 👍 Helpful study tool
- 👍 Fun quiz format
- 👍 Easy to navigate
- 👍 Good for review
Room to improve
- ⏰ Ridiculous timer
- ⏰ Too little time
- ⏰ Timer causes mistakes
- ⏰ Timer prevents practice
- 🐛 Quiz is broken/rigged
Thea
From 2.5K App Store ratingsWhat we love
- 👍 Easy to use
- 🚀 Helpful AI features
- 💰 Free version available
- 📚 Effective for studying and learning
- 🎓 Useful for AP and nursing exams
Room to improve
- 🔍 Lack of spaced repetition setting
- 🔒 Potential for paywalls in the future
Bugs and requests
CellAtlas
Reported bugs
6 issues- Timer is too short
- Quiz moves too slowly after correct answer
- Duplicate images that only one counts
- App not opening on some devices
- Missing WBCs
Show 1 moreShow fewer
- Layout issues on older iPhones
Requested features
22 requests- Remove timer option
- Untimed mode
- More time for quizzes
- Quizzes for specific cells/sections
- More images/examples
Show 17 moreShow fewer
- Larger database of cells
- More examples of atypical/abnormal cells
- Ability to practice specific cell types
- Option to quiz on specific cell types
- More options for tests (e.g., malignancies)
- Ability to practice maturation stages
- Zoomable slides
- Labels for cell structures
- Side-by-side cell comparison
- Save quiz results
- Add body fluid images
- Add coag cascade
- Add disease states/inclusions
- Link to LIS system
- More photos
- Updates for more cell pictures
- Support for older iPhone screens
Thea
Reported bugs
1 issue- Answers not mixed up in matching game
Requested features
2 requests- Spaced repetition setting
- More customization options
In-app purchases
CellAtlas
No in-app purchases
Thea
- Monthly$12.001 Month
- Yearly$48.001 Year









