# Vaia vs Epi Tools

The clearest difference is in-app purchases: Epi Tools at none against Vaia's 10. Epi Tools also leads on rating (5.0 vs 4.7) and review sentiment (100% vs 81%). Vaia's advantage is update cadence (weekly vs every 2 months) and ratings volume (1.6K vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Vaia sells 10 in-app purchases, starting at $2.99 per month. Epi Tools asks for nothing beyond the download.

Epi Tools holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Vaia has 1.6K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 81% of Vaia's written reviews are positive against 100% of Epi Tools's.

Vaia ships an update weekly, Epi Tools every 2 months. The most recent releases landed on November 13, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Vaia | Epi Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (1.6K ratings)](https://appshunter.io/ios/app/vaia-flashcards-and-study-guide/id1439949520/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/epi-tools/id1611139482/reviews)** |
| Number of ratings | **1.6K** | 1 |
| Positive reviews | 81.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Freemium | **Free** |
| Size | 245 MB | 19 MB |
| Requires iOS | 17.0 | **13.4** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [StudySmarter GmbH](https://appshunter.io/developer/1439949519) | [Mark Stevenson](https://appshunter.io/developer/1611139484) |

## What reviewers say

### Vaia

[App page](https://appshunter.io/ios/app/vaia-flashcards-and-study-guide/id1439949520)

Transform your lecture slides, PDFs, and notes into a personalized study guide. Utilize AI to generate flashcards, summaries, and receive explanations for complex topics. Practice and track your progress for homework, midterms, and finals.

**Highlights:** AI-generated flashcards and summaries, Personalized learning paths, Homework help and explanation, Practice quizzes and exams, Spaced repetition for retention, Study planner and progress tracking, Shareable study materials

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan | $2.99 | per month |
| Premium Plan (1 month) | $6.49 | per month |
| Premium Plan (1 month) | $8.99 | per month |
| Premium Plan (1 month) | $19.99 | per month |
| Premium Plan (1 month) | $19.99 | per month |
| Premium Plan (1 year) | $31.99 | per year |
| Premium Plan (1 year) | $43.99 | per year |
| Premium Plan (1 year) | $59.99 | per year |
| Premium Plan (1 year) | $63.99 | per year |
| Premium Plan (1 year) | $89.99 | per year |

**What reviewers like**

- 🚀 Efficient flashcard creation and study tools
- 🧠 AI-powered features for learning
- 📚 Vast library of shared study materials
- 🎨 Customizable and visually appealing interface
- 🤝 Collaboration and sharing with peers

**What reviewers complain about**

- 🐛 Occasional bugs and glitches
- 🔒 Limited offline access without premium subscription
- 🤖 Inconsistent performance of AI-generated content
- 🗂️ Difficulty organizing and navigating large study sets
- 📱 Suboptimal mobile app experience compared to web

**Reported bugs**

- Flashcard review progress not saving correctly
- Inability to delete individual flashcards from a set
- Syncing issues between mobile app and web version
- Inconsistent behavior of AI-generated quiz questions

**Requested features**

- Add more language options
- Improve PDF and note-taking editor functionality
- Implement nested subsets within study sets
- Provide more customization options for colors and themes
- Integrate study timers and task management features


### Epi Tools

[App page](https://appshunter.io/ios/app/epi-tools/id1611139482)

This app provides a suite of epidemiological calculation tools for disease frequency, association, and effect measures. It also includes sample size calculators, diagnostic test validation, and a comprehensive glossary of terms.

**Highlights:** Measures of disease frequency with confidence intervals, Measures of association and effect, Sample size calculators, Diagnostic test validation, Post-test probability estimation, Random number generator, Epidemiology glossary

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Vaia free?

Vaia is free to download, with in-app purchases available.

### Is Epi Tools free?

Epi Tools is free to download, with no in-app purchases.

### Which has better reviews, Vaia or Epi Tools?

Epi Tools is rated higher. Vaia averages 4.7 out of 5 from 1.6K ratings, while Epi Tools averages 5.0 from 1 ratings.

### Do Vaia or Epi Tools have ads?

Neither Vaia nor Epi Tools shows ads.

### Which is updated more often, Vaia or Epi Tools?

Vaia ships an update weekly, and Epi Tools every 2 months. Most recently, Vaia was updated on November 13, 2026 and Epi Tools on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*