# The Buoyancy vs DrPhos' Ionic Compounds

The clearest difference is in-app purchases: The Buoyancy at none against DrPhos' Ionic Compounds's 10. The Buoyancy also leads on iOS requirement (12.0 vs 17.0). DrPhos' Ionic Compounds's advantage is update cadence (every 3 weeks vs every 56 months) and price ($0.99 vs $1.99). On ads and device support there is nothing between them.

The Buoyancy costs $1.99 and DrPhos' Ionic Compounds $0.99 up front. DrPhos' Ionic Compounds sells 10 one-off in-app purchases. The Buoyancy asks for nothing beyond the download.

The Buoyancy ships an update every 56 months, DrPhos' Ionic Compounds every 3 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | The Buoyancy | DrPhos' Ionic Compounds |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | — | **[4.9 (8 ratings)](https://appshunter.io/ios/app/drphos-ionic-compounds/id6473097401/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 56 months | **Every 3 weeks** |
| Monetization | — | Paid |
| Size | 259 MB | 15 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [VIRTUAL FILAMENTS PRIVATE LIMITED](https://appshunter.io/developer/1474217212) | [Monte L Helm](https://appshunter.io/developer/1715082616) |

## What reviewers say

### The Buoyancy

[App page](https://appshunter.io/ios/app/the-buoyancy/id1564691496)

**Features:** macOS Compatibility

**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 (10)**

| 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 |
| 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 The Buoyancy free?

The Buoyancy 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.

### Do The Buoyancy or DrPhos' Ionic Compounds have ads?

Neither The Buoyancy nor DrPhos' Ionic Compounds shows ads.

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

The Buoyancy ships an update every 56 months, and DrPhos' Ionic Compounds every 3 weeks. Most recently, The Buoyancy was updated on November 3, 2026 and DrPhos' Ionic Compounds on November 4, 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.*