# Chemguy vs CHSPE

The clearest difference is monetization model: Chemguy at free against CHSPE's subscription. CHSPE's advantage is update cadence (every 10 months vs every 41 months) and iOS requirement (13.0 vs 15.6). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Chemguy sells 1 one-off in-app purchase and CHSPE sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Chemguy against 5.0 for CHSPE. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

Chemguy ships an update every 41 months, CHSPE every 10 months. The most recent releases landed on September 10, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Chemguy | CHSPE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/chemguy/id1473143126/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/chspe/id1564945215/reviews) |
| Number of ratings | **4** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 10 months** |
| Monetization | **Free** | Subscription |
| Size | 72 MB | 15 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rob Lederer](https://appshunter.io/developer/1472015812) | [YourTeacher.com](https://appshunter.io/developer/340925628) |

## What reviewers say

### Chemguy

[App page](https://appshunter.io/ios/app/chemguy/id1473143126)

Master high school, AP, IB, and first-year university chemistry with over 200 video lessons, comprehensive notes, and over 1000 practice problems. Interactive quizzes and unit exams reinforce learning, with direct messaging support for personalized help.

**Highlights:** Over 200 video lessons, Comprehensive classroom notes, 1000+ practice problems, 100+ interactive quizzes, Unit exams, Direct messaging support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Complete Chemguy Course Entry | Free | one-time |


### CHSPE

[App page](https://appshunter.io/ios/app/chspe/id1564945215)

Prepare for the CHSPE Math test with comprehensive video lessons, practice tests, and diagnostic quizzes. Track your progress with detailed reports and chapter reviews to ensure you pass with confidence. A free trial is available.

**Highlights:** Video instruction, Guided practice, Practice tests, Diagnostic quizzes, Progress tracking, Chapter reviews

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CHSPE Math Test Prep Monthly | $9.99 | per month |
| CHSPE Monthly | $9.99 | per month |


## Frequently asked questions

### Is Chemguy free?

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

### Is CHSPE free?

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

### Which has better reviews, Chemguy or CHSPE?

Chemguy and CHSPE are both rated 5.0 out of 5 on the App Store, from 4 and 2 ratings respectively.

### Do Chemguy or CHSPE have ads?

Neither Chemguy nor CHSPE shows ads.

### Which is updated more often, Chemguy or CHSPE?

Chemguy ships an update every 41 months, and CHSPE every 10 months. Most recently, Chemguy was updated on September 10, 2026 and CHSPE on September 13, 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.*