# Study Stats app vs Cogni

The clearest difference is in-app purchases: Study Stats app at none against Cogni's 9. Study Stats app also leads on iOS requirement (13.0 vs 16.4). Cogni's advantage is update cadence (every 10 days vs every 3 weeks). 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. Study Stats app asks for nothing beyond the download.

Study Stats app ships an update every 3 weeks, Cogni every 10 days. The most recent releases landed on October 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Study Stats app | Cogni |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (1.7K ratings)](https://appshunter.io/ios/app/cogni-ai-flashcards-and-notes/id6737768905/reviews)** |
| Number of ratings | — | **1.7K** |
| Positive reviews | — | 35.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | — | Free with in-app purchases |
| Size | 48 MB | 68 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Chinedum Okpechi](https://appshunter.io/developer/1730044147) | [COGNIFLY LTD](https://appshunter.io/developer/1808620132) |

## What reviewers say

### Study Stats app

[App page](https://appshunter.io/ios/app/study-stats-app/id6477740443)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cogni

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

Create and study flashcards to master new materials efficiently. Utilize an enhanced spaced repetition algorithm to optimize study sessions for exams, languages, or complex subjects. Millions trust this method to achieve their learning goals.

**Highlights:** Create and review custom flashcards, Spaced repetition algorithm, Pre-made deck library, AI-enhanced recall, Progress tracking, Offline access

**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 Study Stats app free?

Study Stats app is free to download, with no in-app purchases.

### Is Cogni free?

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

### Do Study Stats app or Cogni have ads?

Neither Study Stats app nor Cogni shows ads.

### Which is updated more often, Study Stats app or Cogni?

Study Stats app ships an update every 3 weeks, and Cogni every 10 days. Most recently, Study Stats app was updated on October 4, 2026 and Cogni on October 25, 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.*