# Study Lock vs Clavis

The clearest difference is rating: Clavis at 5.0 against Study Lock's 4.5. Study Lock's advantage is ratings volume (11 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Study Lock sells 2 in-app purchases, starting at $5.99 per month and Clavis sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Clavis holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Study Lock has 11 ratings behind it against 2, so its average is the more settled of the two.

Study Lock ships an update every 10 days, Clavis every 3 weeks. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Study Lock | Clavis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (11 ratings)](https://appshunter.io/ios/app/study-lock-earn-screen-time/id6758857561/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/clavis-study-to-unlock/id6767968738/reviews)** |
| Number of ratings | **11** | 2 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Freemium | Free with in-app purchases |
| Size | 42 MB | 5 MB |
| Requires iOS | 17 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Ethan Dietrich](https://appshunter.io/developer/1786120601) | [Clavis App LLC](https://appshunter.io/developer/1896372867) |

## What reviewers say

### Study Lock

[App page](https://appshunter.io/ios/app/study-lock-earn-screen-time/id6758857561)

This app blocks distracting applications until you complete study sessions. It uses AI to generate personalized quizzes and flashcards from your course materials, rewarding you with screen time for correct answers. Track your progress with detailed statistics and spaced repetition.

**Highlights:** AI-generated quizzes and flashcards, Import course material from PDF, photos, text, App blocking via Screen Time integration, Spaced repetition learning algorithm, Oral analysis with AI evaluation, Progress tracking and statistics, Pomodoro timer with Live Activity

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $5.99 | per month |
| Annual Pro | $34.99 | per year |


### Clavis

[App page](https://appshunter.io/ios/app/clavis-study-to-unlock/id6767968738)

Transform your study materials into bite-sized lessons and quick quizzes. Earn access to your favorite apps by completing focused learning sessions, making scrolling the reward for your study efforts.

**Highlights:** AI-generated lessons from your material, Quick quizzes for reinforcement, App blocking via Screen Time, Earn screen time by studying, Upload notes, PDFs, and images, Progress tracking

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Clavis Pro Monthly | $7.99 | per month |
| Clavis Pro Yearly | $59.99 | per year |


## Frequently asked questions

### Is Study Lock free?

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

### Is Clavis free?

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

### Which has better reviews, Study Lock or Clavis?

Clavis is rated higher. Study Lock averages 4.5 out of 5 from 11 ratings, while Clavis averages 5.0 from 2 ratings.

### Do Study Lock or Clavis have ads?

Neither Study Lock nor Clavis shows ads.

### Which is updated more often, Study Lock or Clavis?

Study Lock ships an update every 10 days, and Clavis every 3 weeks. Most recently, Study Lock was updated on October 28, 2026 and Clavis on October 24, 2026.

---

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