# Study Lock vs Professional Math Nerd

The clearest difference is in-app purchases: Professional Math Nerd at none against Study Lock's 2. Professional Math Nerd also leads on ratings volume (3 vs 1). Study Lock's advantage is ads (none vs shown) and update cadence (every 10 days vs monthly). On price, rating, device support and iOS requirement there is nothing between them.

Both are free to download. Study Lock sells 2 in-app purchases, starting at $5.99 per month. Professional Math Nerd asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Study Lock against 5.0 for Professional Math Nerd. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Study Lock ships an update every 10 days, Professional Math Nerd monthly. The most recent releases landed on October 6, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Study Lock | Professional Math Nerd |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/study-lock-earn-screen-time/id6758857561/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/professional-math-nerd-pmn/id6767407060/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 10 days** | Monthly |
| Monetization | Freemium | **Ad-supported** |
| Size | 42 MB | 7 MB |
| Requires iOS | 17 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ethan Dietrich](https://appshunter.io/developer/1786120601) | [Theodor Younany](https://appshunter.io/developer/1865788633) |

## 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 |


### Professional Math Nerd

[App page](https://appshunter.io/ios/app/professional-math-nerd-pmn/id6767407060)

This comprehensive Algebra 2 study guide offers step-by-step lessons, formula references, and practice quizzes. It includes personalized study sessions, progress tracking, and note-taking features, all accessible offline. Optional video explanations and printable worksheets enhance the learning experience.

**Highlights:** Native step-by-step lessons, Searchable offline formula library, Unit-by-unit practice quizzes, Personalized daily study dashboard, Progress tracking charts, Smart flashcard review, Printable practice worksheets, Handwritten and typed note-taking

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

**In-app purchases:** none


## Frequently asked questions

### Is Study Lock free?

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

### Is Professional Math Nerd free?

Professional Math Nerd is free to download, with no in-app purchases.

### Which has better reviews, Study Lock or Professional Math Nerd?

Study Lock and Professional Math Nerd are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do Study Lock or Professional Math Nerd have ads?

Professional Math Nerd shows ads; Study Lock does not.

### Which is updated more often, Study Lock or Professional Math Nerd?

Study Lock ships an update every 10 days, and Professional Math Nerd monthly. Most recently, Study Lock was updated on October 6, 2026 and Professional Math Nerd on October 9, 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.*