# Epi Tools vs Cogni

The clearest difference is review sentiment: Epi Tools at 100% against Cogni's 36%. Epi Tools also leads on in-app purchases (none vs 9) and rating (5.0 vs 4.7). Cogni's advantage is update cadence (weekly vs every 2 months) and ratings volume (1.7K vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Cogni sells 9 in-app purchases, starting at $4.99 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: Cogni has 1.7K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Epi Tools's written reviews are positive against 36% of Cogni's.

Epi Tools ships an update every 2 months, Cogni weekly. The most recent releases landed on November 3, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | Epi Tools | Cogni |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/epi-tools/id1611139482/reviews)** | [4.7 (1.7K ratings)](https://appshunter.io/ios/app/cogni-ai-flashcards-and-notes/id6737768905/reviews) |
| Number of ratings | 1 | **1.7K** |
| Positive reviews | **100.0% of reviews** | 35.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Free** | Freemium |
| Size | 19 MB | 76 MB |
| Requires iOS | **13.4** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Mark Stevenson](https://appshunter.io/developer/1611139484) | [COGNIFLY LTD](https://appshunter.io/developer/1808620132) |

## What reviewers say

### 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


### Cogni

[App page](https://appshunter.io/ios/app/cogni-ai-flashcards-and-notes/id6737768905)

This app uses AI to generate flashcards from various sources like PDFs, notes, and lecture recordings. It employs spaced repetition with the FSRS algorithm to optimize memorization and allows for Anki deck import. Study notes can be generated alongside cards, and a library of pre-made decks is available.

**Highlights:** AI flashcard generation, FSRS spaced repetition, Anki deck import, Integrated study notes, Offline study mode, Library of pre-made decks

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $4.99 | per month |
| Premium Monthly | $7.99 | per month |
| Premium Monthly | $14.99 | per month |
| Premium Annual | $19.99 | per year |
| Premium Annual | $24.99 | per year |
| Premium Annual | $29.99 | per year |
| Premium Annual | $49.99 | per year |
| Lifetime Premium | $69.99 | one-time |
| Premium Lifetime | $99.99 | one-time |

**What reviewers like**

- 👍 Great app for memorizing and growing recall skills
- 🚀 Lifesaver for challenging, memory-heavy subjects like med school
- 👍 Sleek and user-friendly interface, no distractions

**What reviewers complain about**

- 🐛 Locked up referring to an upgrade page, couldn't continue using the app
- 🐛 Not easy to use, inaccurate for Spanish language
- 🐛 Desktop flashcards deck won't sync with mobile, forcing duplicate work

**Reported bugs**

- App no longer available after paying for annual subscription
- Occasional crashes

**Requested features**

- Integrate ChatGPT or Claude for automatic card creation
- Add sub-decks for larger decks that need more review
- Improve algorithm for hard/again ratings to better target struggling cards
- Add subsections for decks to study different sections separately


## Frequently asked questions

### Is Epi Tools free?

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

### Is Cogni free?

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

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

Epi Tools is rated higher. Epi Tools averages 5.0 out of 5 from 1 ratings, while Cogni averages 4.7 from 1.7K ratings.

### Do Epi Tools or Cogni have ads?

Neither Epi Tools nor Cogni shows ads.

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

Epi Tools ships an update every 2 months, and Cogni weekly. Most recently, Epi Tools was updated on November 3, 2026 and Cogni on November 12, 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.*