# SA Geo vs DrPhos' Ionic Compounds

The clearest difference is price: SA Geo at Free against DrPhos' Ionic Compounds's $0.99. SA Geo also leads on iOS requirement (11.0 vs 17.0). DrPhos' Ionic Compounds's advantage is update cadence (every 3 weeks vs every 2 months). On rating, review sentiment, ratings volume and ads there is nothing between them.

SA Geo is free to download; DrPhos' Ionic Compounds costs $0.99 up front. SA Geo sells 1 one-off in-app purchase 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 — 5.0 for SA Geo against 4.9 for DrPhos' Ionic Compounds. Both are backed by a comparable volume of ratings — 3 and 8 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

SA Geo ships an update every 2 months, DrPhos' Ionic Compounds every 3 weeks. The most recent releases landed on June 3, 2026 and June 2, 2026 respectively.

## The numbers

| Metric | SA Geo | DrPhos' Ionic Compounds |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sa-geo/id1669107523/reviews)** | [4.9 (8 ratings)](https://appshunter.io/ios/app/drphos-ionic-compounds/id6473097401/reviews) |
| Number of ratings | 3 | **8** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 139 MB | 15 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Darren McNally](https://appshunter.io/developer/1435108864) | [Monte L Helm](https://appshunter.io/developer/1715082616) |

## What reviewers say

### SA Geo

[App page](https://appshunter.io/ios/app/sa-geo/id1669107523)

Explore the geography of South America through interactive activities. Learn about countries, capitals, national parks, and animals with engaging quizzes and challenges.

**Highlights:** Country identification, Capital city quizzes, National park exploration, Animal fact learning, Geography challenges, Grab Bag activity

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | $1.99 | one-time |


### 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 SA Geo free?

SA Geo 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, SA Geo or DrPhos' Ionic Compounds?

SA Geo is rated higher. SA Geo averages 5.0 out of 5 from 3 ratings, while DrPhos' Ionic Compounds averages 4.9 from 8 ratings.

### Do SA Geo or DrPhos' Ionic Compounds have ads?

Neither SA Geo nor DrPhos' Ionic Compounds shows ads.

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

SA Geo ships an update every 2 months, and DrPhos' Ionic Compounds every 3 weeks. Most recently, SA Geo was updated on June 3, 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.*