# Chem AI vs DrPhos' Ionic Compounds

The clearest difference is review sentiment: DrPhos' Ionic Compounds at 100% against Chem AI's 20%. DrPhos' Ionic Compounds also leads on rating (4.9 vs 4.4) and ads (none vs shown). Chem AI's advantage is price (Free vs $0.99) and ratings volume (824 vs 8). On update cadence, in-app purchases, device support and iOS requirement there is nothing between them.

Chem AI is free to download; DrPhos' Ionic Compounds costs $0.99 up front. Chem AI sells 15 in-app purchases, starting at $0.99 per 7 days and DrPhos' Ionic Compounds sells 11 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

DrPhos' Ionic Compounds holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: Chem AI has 824 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 20% of Chem AI's written reviews are positive against 100% of DrPhos' Ionic Compounds's.

Chem AI ships an update fortnightly, DrPhos' Ionic Compounds every 3 weeks. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Chem AI | DrPhos' Ionic Compounds |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.4 (824 ratings)](https://appshunter.io/ios/app/chem-ai-chemistry-solver/id6471891010/reviews) | **[4.9 (8 ratings)](https://appshunter.io/ios/app/drphos-ionic-compounds/id6473097401/reviews)** |
| Number of ratings | **824** | 8 |
| Positive reviews | 20.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Subscription | **Paid** |
| Size | 149 MB | 15 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ZipoApps](https://appshunter.io/developer/1671444635) | [Monte L Helm](https://appshunter.io/developer/1715082616) |

## What reviewers say

### 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


### DrPhos' Ionic Compounds

[App page](https://appshunter.io/ios/app/drphos-ionic-compounds/id6473097401)

This app helps students learn and practice forming correct chemical formulas for ionic compounds. It supports a wide range of ions, including polyatomic ones, and dynamically generates formulas with proper subscripts and parentheses. It's designed to reinforce naming rules and charge balancing through an interactive interface.

**Highlights:** Extensive cation and anion list, Support for polyatomic ions, Real-time formula generation, Subscript and parenthesis formatting, Reinforces naming rules, Charge balancing practice

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ionic Compound Builder | Free | one-time |
| Science Calculator | $0.99 | one-time |
| Significant Figures Counter | $0.99 | one-time |
| Quadratic Equation Solver | $0.99 | one-time |
| Kinetics | $0.99 | one-time |
| Molar Mass Calculator | $0.99 | one-time |
| Naming Compounds | $0.99 | one-time |
| Reaction Balancer | $0.99 | one-time |
| Stoichiometry | $0.99 | one-time |
| Solution Concentrations | $0.99 | one-time |
| pH Calculator | $0.99 | one-time |


## Frequently asked questions

### Is Chem AI free?

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

### Is DrPhos' Ionic Compounds free?

DrPhos' Ionic Compounds costs $0.99, and also offers in-app purchases.

### Which has better reviews, Chem AI or DrPhos' Ionic Compounds?

DrPhos' Ionic Compounds is rated higher. Chem AI averages 4.4 out of 5 from 824 ratings, while DrPhos' Ionic Compounds averages 4.9 from 8 ratings.

### Do Chem AI or DrPhos' Ionic Compounds have ads?

Chem AI shows ads; DrPhos' Ionic Compounds does not.

### Which is updated more often, Chem AI or DrPhos' Ionic Compounds?

Chem AI ships an update fortnightly, and DrPhos' Ionic Compounds every 3 weeks. Most recently, Chem AI was updated on October 24, 2026 and DrPhos' Ionic Compounds on October 16, 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.*