# Cogni vs Thea

Cogni and Thea both sit at 4.7 stars, but that hides the real split: 93% of Thea's written reviews are positive against 36% of Cogni's. Thea also leads on device support (4 vs 2). Cogni's advantage is update cadence (every 9 days vs monthly). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Cogni sells 9 in-app purchases, starting at $4.99 per month and Thea sells 2 in-app purchases, starting at $12.00 per month. Whichever you choose, the download price is not the number that matters.

Thea holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 1.7K and 2.5K respectively. Written reviews point the same way: 36% of Cogni's written reviews are positive against 93% of Thea's.

Cogni ships an update every 9 days, Thea monthly. Both last shipped on October 30, 2026.

## The numbers

| Metric | Cogni | Thea |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (1.7K ratings)](https://appshunter.io/ios/app/cogni-ai-flashcards-and-notes/id6737768905/reviews) | **[4.9 (2.5K ratings)](https://appshunter.io/ios/app/thea-study-smart/id6742800289/reviews)** |
| Number of ratings | 1.7K | **2.5K** |
| Positive reviews | 35.7% of reviews | **92.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 69 MB | 4 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 12+ |
| Developer | [COGNIFLY LTD](https://appshunter.io/developer/1808620132) | [Thea Study](https://appshunter.io/developer/1800055800) |

## What reviewers say

### Cogni

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

Create and study flashcards using an AI-enhanced spaced repetition algorithm to optimize learning. Access a vast library of pre-made decks and track your progress with detailed statistics. Study offline with media-supported flashcards.

**Highlights:** AI-enhanced spaced repetition, Create and review flashcards, Library of pre-made decks, Detailed statistics and progress tracking, Offline access with media support, Customizable flashcard creation

**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


### Thea

[App page](https://appshunter.io/ios/app/thea-study-smart/id6742800289)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $12.00 | per month |
| Yearly | $48.00 | per year |

**What reviewers like**

- 👍 Easy to use
- 🚀 Helpful AI features
- 💰 Free version available
- 📚 Effective for studying and learning
- 🎓 Useful for AP and nursing exams

**What reviewers complain about**

- 🔍 Lack of spaced repetition setting
- 🔒 Potential for paywalls in the future

**Reported bugs**

- Answers not mixed up in matching game

**Requested features**

- Spaced repetition setting
- More customization options


## Frequently asked questions

### Is Cogni free?

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

### Is Thea free?

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

### Which has better reviews, Cogni or Thea?

Thea is rated higher. Cogni averages 4.7 out of 5 from 1.7K ratings, while Thea averages 4.9 from 2.5K ratings.

### Do Cogni or Thea have ads?

Neither Cogni nor Thea shows ads.

### Which is updated more often, Cogni or Thea?

Cogni ships an update every 9 days, and Thea monthly. Most recently, Cogni was updated on October 30, 2026 and Thea on October 30, 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.*