# Chemistutor vs Linus

The clearest difference is rating: Linus at 4.8 against Chemistutor's 4.0. Linus also leads on update cadence (every 11 days vs every 12 months) and ratings volume (759 vs 27). Chemistutor's advantage is in-app purchases (none vs 14) and ads (none vs shown). On price, review sentiment and device support there is nothing between them.

Both are free to download. Linus sells 14 in-app purchases, starting at $24.99 per 3 months. Chemistutor asks for nothing beyond the download.

Linus holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Linus has 759 ratings behind it against 27, so its average is the more settled of the two. Written reviews complicate that: 76% of Chemistutor's written reviews are positive against 68% of Linus's, so the app with the better star average is not the one people write more warmly about.

Chemistutor ships an update every 12 months, Linus every 11 days. The most recent releases landed on August 12, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Chemistutor | Linus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (27 ratings)](https://appshunter.io/ios/app/chemistutor/id6670772147/reviews) | **[4.8 (759 ratings)](https://appshunter.io/ios/app/linus-digital-sat-prep/id6740494483/reviews)** |
| Number of ratings | 27 | **759** |
| Positive reviews | **76.2% of reviews** | 68.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 11 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 25 MB | 93 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jonathan Davis Miller](https://appshunter.io/developer/1767512630) | [Linus Labs, Inc.](https://appshunter.io/developer/1790246412) |

## What reviewers say

### Chemistutor

[App page](https://appshunter.io/ios/app/chemistutor/id6670772147)

Master AP Chemistry with this comprehensive study tool. It offers readings, diagrams, and example problems aligned with the AP curriculum. Learn anytime, anywhere, without distractions, to achieve success in a challenging course.

**Highlights:** AP Chemistry curriculum coverage, 100+ concise lessons, Readings, diagrams, and example problems, No ads or in-app purchases, Learn anytime, anywhere, iPhone and iPad compatible

**In-app purchases:** none


### Linus

[App page](https://appshunter.io/ios/app/linus-digital-sat-prep/id6740494483)

This app offers a gamified approach to preparing for the new Digital SAT. It provides targeted practice for Math, Vocabulary, and Reading sections, with features like daily quests and progress tracking to make studying engaging and effective.

**Highlights:** Gamified learning with quests and streaks, Simulates Bluebook testing experience, Targeted Math, Vocabulary, and Reading practice, Smart study planner for bite-sized lessons, Instant feedback on answers, Progress tracking

**Features:** macOS Compatibility

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Quarterly | $24.99 | per 3 months |
| Turbo | $24.99 | per month |
| Turbo | $24.99 | per month |
| Premium Yearly | $49.99 | per year |
| Turbo Monthly | $99.00 | per month |
| Turbo Monthly | $100.00 | per month |
| Turbo | $149.99 | per year |
| Turbo | $149.99 | per year |
| Turbo | $150.00 | per month |
| Linus Premium | $249.00 | per 3 months |
| Turbo Yearly | $499.00 | per year |
| Turbo | $500.00 | per year |
| Turbo Yearly | $600.00 | per year |
| SAT Test Date Access | $79.00 | one-time |

**What reviewers like**

- 💪 Perfect app
- 👍 Nice game
- 👍 Enjoyable!
- 👍 Best SAT app
- 👍 Easily the BEST FREE SAT Resource out there!

**Requested features**

- Personalized practice
- Practice tests


## Frequently asked questions

### Is Chemistutor free?

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

### Is Linus free?

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

### Which has better reviews, Chemistutor or Linus?

Linus is rated higher. Chemistutor averages 4.0 out of 5 from 27 ratings, while Linus averages 4.8 from 759 ratings.

### Do Chemistutor or Linus have ads?

Linus shows ads; Chemistutor does not.

### Which is updated more often, Chemistutor or Linus?

Chemistutor ships an update every 12 months, and Linus every 11 days. Most recently, Chemistutor was updated on August 12, 2026 and Linus on September 22, 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.*