# Physiology Solution vs Chem AI

The clearest difference is review sentiment: Physiology Solution at 67% against Chem AI's 20%. Physiology Solution also leads on in-app purchases (none vs 16) and ads (none vs shown). Chem AI's advantage is rating (4.4 vs 3.8) and update cadence (fortnightly vs every 7 months). On price and device support there is nothing between them.

Both are free to download. Chem AI sells 15 in-app purchases, starting at $0.99 per 7 days. Physiology Solution asks for nothing beyond the download.

Chem AI holds the better App Store score, 4.4 against 3.8. That said, the two scores are not equally well evidenced: Chem AI has 823 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 67% of Physiology Solution's written reviews are positive against 20% of Chem AI's, so the app with the better star average is not the one people write more warmly about.

Physiology Solution ships an update every 7 months, Chem AI fortnightly. The most recent releases landed on October 10, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Physiology Solution | Chem AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (5 ratings)](https://appshunter.io/ios/app/physiology-solution/id1455306712/reviews) | **[4.4 (823 ratings)](https://appshunter.io/ios/app/chem-ai-chemistry-solver/id6471891010/reviews)** |
| Number of ratings | 5 | **823** |
| Positive reviews | **66.7% of reviews** | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Fortnightly** |
| Monetization | **Free** | Subscription |
| Size | 3 MB | 149 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Quantum Quasar Infoworld LLP](https://appshunter.io/developer/1095005974) | [ZipoApps](https://appshunter.io/developer/1671444635) |

## What reviewers say

### Physiology Solution

[App page](https://appshunter.io/ios/app/physiology-solution/id1455306712)

Explore comprehensive information on human physiology, drawing from established medical texts. This educational tool provides key concepts and figures for learning purposes.

**Highlights:** Human physiology content, Based on Guyton and Ganong, Educational figures and text, Comprehensive information

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $0.99 | per 7 days |
| Unlimited Access | $2.99 | per 7 days |
| Unlimited Access | $3.99 | per 7 days |
| Unlimited Access | $4.99 | per 7 days |
| Unlimited Access | $5.99 | per 7 days |
| Chem AI - Chem Solver Weekly | $5.99 | per 7 days |
| Unlimited Access | $6.99 | per 7 days |
| Unlimited Access | $7.99 | 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 Physiology Solution free?

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

### Is Chem AI free?

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

### Which has better reviews, Physiology Solution or Chem AI?

Chem AI is rated higher. Physiology Solution averages 3.8 out of 5 from 5 ratings, while Chem AI averages 4.4 from 823 ratings.

### Do Physiology Solution or Chem AI have ads?

Chem AI shows ads; Physiology Solution does not.

### Which is updated more often, Physiology Solution or Chem AI?

Physiology Solution ships an update every 7 months, and Chem AI fortnightly. Most recently, Physiology Solution was updated on October 10, 2026 and Chem AI on October 30, 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.*