# IntroStat vs Chem AI

The clearest difference is review sentiment: IntroStat at 92% against Chem AI's 20%. IntroStat also leads on rating (4.9 vs 4.4) and monetization model (free with in-app purchases vs subscription). Chem AI's advantage is update cadence (fortnightly vs every 3 months) and ratings volume (822 vs 24). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. IntroStat sells 1 one-off in-app purchase and Chem AI sells 9 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

IntroStat holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: Chem AI has 822 ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 92% of IntroStat's written reviews are positive against 20% of Chem AI's.

IntroStat ships an update every 3 months, Chem AI fortnightly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | IntroStat | Chem AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (24 ratings)](https://appshunter.io/ios/app/introstat-statistics-solver/id1592602025/reviews)** | [4.4 (822 ratings)](https://appshunter.io/ios/app/chem-ai-chemistry-solver/id6471891010/reviews) |
| Number of ratings | 24 | **822** |
| Positive reviews | **92.3% of reviews** | 20.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 38 MB | 149 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Zhiyi Zhang](https://appshunter.io/developer/1592602327) | [ZipoApps](https://appshunter.io/developer/1671444635) |

## What reviewers say

### IntroStat

[App page](https://appshunter.io/ios/app/introstat-statistics-solver/id1592602025)

This app serves as a comprehensive statistics calculator and learning tool for introductory statistics courses. It offers a wide range of calculation features, data visualization, and an integrated textbook with formulas and examples.

**Highlights:** Summary statistics calculation, Data visualization (boxplots, histograms), Probability calculations, Hypothesis testing, Confidence intervals, Integrated statistics textbook

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IntroStat Premium Features | $4.99 | one-time |


### Chem AI

[App page](https://appshunter.io/ios/app/chem-ai-chemistry-solver/id6471891010)

Instantly solve any chemistry problem with step-by-step explanations. Upload or photograph your questions, and get detailed solutions for various chemistry topics, from high school to advanced research. Offers a free trial before subscription.

**Highlights:** Photo recognition for chemistry problems, Step-by-step solution explanations, Supports high school to doctoral research topics, Detailed math solutions, Copy and share solutions

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $0.99 | per 7 days |
| Chem AI - Chem Solver Weekly | $5.99 | per 7 days |
| Unlimited Access | $8.99 | per 7 days |
| Unlimited Access | $9.99 | per year |
| Unlimited Access | $19.99 | per month |
| Unlimited Access | $29.99 | per year |
| Chem AI - Chem Solver Yearly | $34.99 | per year |
| Unlimited Access | $39.99 | per year |
| Unlimited Access | $49.99 | per year |

**What reviewers like**

- 🚀 Quick problem solving
- 💡 Helpful for chemistry courses
- 👍 Easy to use

**What reviewers complain about**

- 🐛 Incorrect answers
- 🔒 Subscription issues
- 💰 Expensive
- 🤔 Limited functionality in advanced courses

**Reported bugs**

- Freezes or goes blank when trying to get answers
- Incompatible with some chemistry problems

**Requested features**

- Improve accuracy for organic chemistry and physical chemistry
- Add step-by-step explanations for free users
- Improve subscription management and cancellation process


## Frequently asked questions

### Is IntroStat free?

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

### Is Chem AI free?

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

### Which has better reviews, IntroStat or Chem AI?

IntroStat is rated higher. IntroStat averages 4.9 out of 5 from 24 ratings, while Chem AI averages 4.4 from 822 ratings.

### Do IntroStat or Chem AI have ads?

Both IntroStat and Chem AI show ads.

### Which is updated more often, IntroStat or Chem AI?

IntroStat ships an update every 3 months, and Chem AI fortnightly. Most recently, IntroStat was updated on November 3, 2026 and Chem AI on November 4, 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.*