# Studdy vs DrPhos' Ionic Compounds

The clearest difference is price: Studdy at Free against DrPhos' Ionic Compounds's $0.99. Studdy also leads on ratings volume (13K vs 8) and iOS requirement (15.0 vs 17.0). DrPhos' Ionic Compounds's advantage is review sentiment (100% vs 89%). On rating, update cadence, ads and in-app purchases there is nothing between them.

Studdy is free to download; DrPhos' Ionic Compounds costs $0.99 up front. Studdy sells 35 in-app purchases, starting at $1.99 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.

On the App Store both sit at effectively the same score — 4.8 for Studdy against 4.9 for DrPhos' Ionic Compounds. That said, the two scores are not equally well evidenced: Studdy has 13K ratings behind it against 8, so its average is the more settled of the two. Written reviews are what separate them: 89% of Studdy's written reviews are positive against 100% of DrPhos' Ionic Compounds's.

Studdy ships an update every 10 days, DrPhos' Ionic Compounds every 3 weeks. The most recent releases landed on September 25, 2026 and June 2, 2026 respectively.

## The numbers

| Metric | Studdy | DrPhos' Ionic Compounds |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.8 (13K ratings)](https://appshunter.io/ios/app/studdy-ai-tutor-and-math-solver/id6450114499/reviews) | **[4.9 (8 ratings)](https://appshunter.io/ios/app/drphos-ionic-compounds/id6473097401/reviews)** |
| Number of ratings | **13K** | 8 |
| Positive reviews | 89.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | **Freemium** | Paid |
| Size | 64 MB | 15 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Studdy, LLC](https://appshunter.io/developer/1680988865) | [Monte L Helm](https://appshunter.io/developer/1715082616) |

## What reviewers say

### Studdy

[App page](https://appshunter.io/ios/app/studdy-ai-tutor-and-math-solver/id6450114499)

This AI-powered tutor assists students with homework by providing step-by-step explanations for math and science problems. It offers personalized tutoring, video tutorials, and practice problems to help improve understanding and grades.

**Highlights:** AI-powered step-by-step problem solver, Photo scanning for homework problems, Personalized 1:1 AI tutoring, Video tutorials for complex topics, Practice problem generation, Graphing for visual understanding

**Features:** Family Sharing, Vision Pro support

**In-app purchases (35)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Studdy Unlimited | $1.99 | per 7 days |
| Studdy Unlimited | $1.99 | per 7 days |
| Studdy Unlimited | $4.99 | per 7 days |
| Studdy Unlimited | $5.99 | per 7 days |
| Studdy Unlimited | $6.99 | per 7 days |
| Studdy Unlimited | $6.99 | per 7 days |
| Studdy Unlimited | $6.99 | per 7 days |
| Power Monthly | $9.99 | per month |
| Studdy Lite | $9.99 | per month |
| Studdy Lite | $9.99 | per month |
| Studdy Unlimited | $9.99 | per month |
| Studdy Unlimited | $9.99 | per month |
| Studdy Pro | $14.99 | per month |
| Power Monthly | $19.99 | per month |
| Studdy Unlimited | $19.99 | per month |
| Studdy Unlimited | $19.99 | per month |
| Studdy Unlimited | $29.99 | per month |
| Studdy Unlimited | $39.99 | per year |
| Power Annual | $59.99 | per year |
| Studdy Lite | $59.99 | per year |
| Studdy Unlimited | $59.99 | per year |
| Studdy Lite | $59.99 | per year |
| Studdy Unlimited | $59.99 | per year |
| Studdy Unlimited | $69.99 | per year |
| Studdy Unlimited | $69.99 | per year |
| Studdy Pro | $95.99 | per year |
| Studdy Unlimited | $99.99 | per year |
| Studdy Unlimited | $99.99 | per year |
| Studdy Unlimited | $143.99 | per year |
| Studdy Unlimited | $143.99 | per year |
| Studdy Unlimited | $179.99 | per year |
| Studdy Unlimited | $179.99 | per year |
| 5 Snaps Pack | $0.99 | one-time |
| 10 Snaps Pack | $0.99 | one-time |
| 30 Snaps Pack | $4.99 | one-time |

**What reviewers like**

- 🚀 Helpful and accurate solutions
- 👍 Detailed step-by-step explanations
- 🤖 Powerful AI assistant
- 💡 Versatile for all subjects
- 🆓 Free to use with some limitations

**What reviewers complain about**

- 🔒 Limited free usage
- 💰 Paid version required for full access
- 🐛 Occasional inaccurate solutions
- 🔍 Camera issues with some users

**Reported bugs**

- Inconsistent performance across devices
- Freezing or crashing on certain devices

**Requested features**

- More free usage allowance
- Improved accuracy and reliability
- Enhanced user interface and navigation


### 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 Studdy free?

Studdy 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, Studdy or DrPhos' Ionic Compounds?

DrPhos' Ionic Compounds is rated higher. Studdy averages 4.8 out of 5 from 13K ratings, while DrPhos' Ionic Compounds averages 4.9 from 8 ratings.

### Do Studdy or DrPhos' Ionic Compounds have ads?

Neither Studdy nor DrPhos' Ionic Compounds shows ads.

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

Studdy ships an update every 10 days, and DrPhos' Ionic Compounds every 3 weeks. Most recently, Studdy was updated on September 25, 2026 and DrPhos' Ionic Compounds on June 2, 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.*