# Smart periodic table vs DrPhos' Ionic Compounds

Smart periodic table and DrPhos' Ionic Compounds both sit at 5.0 stars, but that hides the real split: 100% of DrPhos' Ionic Compounds's written reviews are positive against 0% of Smart periodic table's. DrPhos' Ionic Compounds also leads on update cadence (every 3 weeks vs every 7 months) and ratings volume (8 vs 1). Smart periodic table's advantage is in-app purchases (none vs 11) and iOS requirement (15.0 vs 17.0). On rating, ads, monetization model and device support there is nothing between them.

Smart periodic table costs $1.99 and DrPhos' Ionic Compounds $0.99 up front. DrPhos' Ionic Compounds sells 11 one-off in-app purchases. Smart periodic table asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Smart periodic table against 4.9 for DrPhos' Ionic Compounds. That said, the two scores are not equally well evidenced: DrPhos' Ionic Compounds has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 0% of Smart periodic table's written reviews are positive against 100% of DrPhos' Ionic Compounds's.

Smart periodic table ships an update every 7 months, DrPhos' Ionic Compounds every 3 weeks. The most recent releases landed on October 15, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Smart periodic table | DrPhos' Ionic Compounds |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/smart-periodic-table/id329156691/reviews)** | [4.9 (8 ratings)](https://appshunter.io/ios/app/drphos-ionic-compounds/id6473097401/reviews) |
| Number of ratings | 1 | **8** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Size | 1 MB | 15 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AOBO Co.,Ltd](https://appshunter.io/developer/310846199) | [Monte L Helm](https://appshunter.io/developer/1715082616) |

## What reviewers say

### Smart periodic table

[App page](https://appshunter.io/ios/app/smart-periodic-table/id329156691)

Access comprehensive details on all 118 chemical elements, including their properties, discovery, and atomic information. This app serves as a valuable study aid and translation tool, offering offline access to basic data and online links to Wikipedia for further research.

**Highlights:** 118 element details, Multi-language element names, Offline basic information, Online Wikipedia links, Search by category/phase, Email element data

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

**In-app purchases:** none


### 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 Smart periodic table free?

Smart periodic table costs $1.99, with no in-app purchases.

### Is DrPhos' Ionic Compounds free?

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

### Which has better reviews, Smart periodic table or DrPhos' Ionic Compounds?

Smart periodic table is rated higher. Smart periodic table averages 5.0 out of 5 from 1 ratings, while DrPhos' Ionic Compounds averages 4.9 from 8 ratings.

### Do Smart periodic table or DrPhos' Ionic Compounds have ads?

Neither Smart periodic table nor DrPhos' Ionic Compounds shows ads.

### Which is updated more often, Smart periodic table or DrPhos' Ionic Compounds?

Smart periodic table ships an update every 7 months, and DrPhos' Ionic Compounds every 3 weeks. Most recently, Smart periodic table was updated on October 15, 2026 and DrPhos' Ionic Compounds on September 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.*