# PopStudy vs Chem AI

The clearest difference is review sentiment: PopStudy at 100% against Chem AI's 20%. PopStudy also leads on rating (4.9 vs 4.4) and monetization model (ad-supported vs subscription). Chem AI's advantage is ratings volume (823 vs 9) and iOS requirement (16.0 vs 18.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. PopStudy sells 9 in-app purchases, starting at $7.49 per month and Chem AI sells 15 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PopStudy holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: Chem AI has 823 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 100% of PopStudy's written reviews are positive against 20% of Chem AI's.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | PopStudy | Chem AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (9 ratings)](https://appshunter.io/ios/app/popstudy-language-learning/id1169672977/reviews)** | [4.4 (823 ratings)](https://appshunter.io/ios/app/chem-ai-chemistry-solver/id6471891010/reviews) |
| Number of ratings | 9 | **823** |
| Positive reviews | **100.0% of reviews** | 20.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | **Ad-supported** | Subscription |
| Size | 152 MB | 149 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Longtail Studios](https://appshunter.io/developer/305747913) | [ZipoApps](https://appshunter.io/developer/1671444635) |

## What reviewers say

### PopStudy

[App page](https://appshunter.io/ios/app/popstudy-language-learning/id1169672977)

Master any subject with this educational app utilizing a spaced repetition system. Create custom study mixes, engage in personalized sessions, and track your learning progress. Access curated content and study offline on your devices.

**Highlights:** Spaced repetition system, Curated expert content, Customizable study mixes, Personalized daily sessions, Progress tracking, Cross-device syncing, Offline studying

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Student Monthly | $7.49 | per month |
| Personal Monthly | $14.99 | per month |
| Family Monthly | $19.99 | per month |
| Student Yearly | $47.90 | per year |
| Personal Yearly | $95.90 | per year |
| Family Yearly | $167.99 | per year |
| 1-Month Subscription | $7.99 | one-time |
| 3-Month Subscription | $19.99 | one-time |
| 1-Year Subscription | $59.99 | 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 (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 PopStudy free?

PopStudy 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, PopStudy or Chem AI?

PopStudy is rated higher. PopStudy averages 4.9 out of 5 from 9 ratings, while Chem AI averages 4.4 from 823 ratings.

### Do PopStudy or Chem AI have ads?

Chem AI shows ads; PopStudy does not.

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

PopStudy ships an update fortnightly, and Chem AI fortnightly. Most recently, PopStudy was updated on October 29, 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.*