# Knowt vs TheRareLens

The clearest difference is in-app purchases: TheRareLens at none against Knowt's 10. Knowt's advantage is chart position (#40 vs unranked). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Knowt sells 9 in-app purchases, starting at $9.99 per 7 days. TheRareLens asks for nothing beyond the download.

## The numbers

| Metric | Knowt | TheRareLens |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (11K ratings)](https://appshunter.io/ios/app/knowt-ai-flashcards-and-notes/id6463744184/reviews)** | — |
| Number of ratings | **11K** | — |
| Positive reviews | 61.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Freemium | — |
| Best chart rank | **#40** | — |
| Size | 150 MB | 42 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Knowt Inc.](https://appshunter.io/developer/1462368056) | [Aditi Kishore](https://appshunter.io/developer/1896675785) |

## What reviewers say

### Knowt

[App page](https://appshunter.io/ios/app/knowt-ai-flashcards-and-notes/id6463744184)

**Currently charting:** #40 Top Free · Education, #105 Top Grossing · Education (US App Store)

This app uses AI to transform your study materials into flashcards and practice tests. It offers efficient note-taking and a spaced repetition system to help you master subjects and prepare for exams.

**Highlights:** AI flashcard creation, Note summarization, Practice test generation, Spaced repetition, Free Learn Mode, AP exam study guides

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Student Ultra Weekly | $9.99 | per 7 days |
| Student Ultra Monthly | $14.99 | per month |
| Student Ultra Monthly | $19.99 | per month |
| Student Ultra Monthly | $24.99 | per month |
| Student Ultra Annual | $59.99 | per year |
| Student Ultra Annual | $95.99 | per year |
| Student Ultra Annual | $119.99 | per year |
| Student Ultra Annual | $119.99 | per year |
| Student ultra annual | $149.99 | per year |

**What reviewers like**

- 🚀 Amazing app
- 🚀 Quizlet alternative
- 👍 Helpful for studying
- 👍 Easy to use
- 👍 Intuitive interface

**What reviewers complain about**

- 🐛 Frequent crashes
- 🐛 Glitchy app
- 🐛 Bugs with flashcard functionality
- 🐛 Inconsistent performance
- 🐛 Syncing issues between devices

**Reported bugs**

- Flashcards disappearing or duplicating
- Incorrect answers marked as correct
- Freezing on update screen
- Compatibility issues on certain devices

**Requested features**

- Split screen support for iPad
- Ability to manually sort flashcards
- More formatting options for flashcards
- Improved AI-generated notes
- Offline study mode


### TheRareLens

[App page](https://appshunter.io/ios/app/therarelens/id6784095604)

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

**In-app purchases:** none


## Frequently asked questions

### Is Knowt free?

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

### Is TheRareLens free?

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

### Do Knowt or TheRareLens have ads?

Neither Knowt nor TheRareLens shows ads.

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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.*