# Calc pH vs Mass Molarity Calculator

The clearest difference is price: Calc pH at Free against Mass Molarity Calculator's $2.99. Calc pH also leads on iOS requirement (9.0 vs 13). Mass Molarity Calculator's advantage is update cadence (every 29 months vs every 59 months). On ads, in-app purchases and device support there is nothing between them.

Calc pH is free to download; Mass Molarity Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Calc pH ships an update every 59 months, Mass Molarity Calculator every 29 months. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Calc pH | Mass Molarity Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 59 months | **Every 29 months** |
| Size | 0 MB | 1 MB |
| Requires iOS | **9.0** | 13 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ZOFTERM](https://appshunter.io/developer/557950548) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### Calc pH

[App page](https://appshunter.io/ios/app/calc-ph/id566354963)

**Features:** macOS Compatibility

**In-app purchases:** none


### Mass Molarity Calculator

[App page](https://appshunter.io/ios/app/mass-molarity-calculator/id1351095833)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calc pH free?

Calc pH is free to download, with no in-app purchases.

### Is Mass Molarity Calculator free?

Mass Molarity Calculator costs $2.99, with no in-app purchases.

### Do Calc pH or Mass Molarity Calculator have ads?

Neither Calc pH nor Mass Molarity Calculator shows ads.

### Which is updated more often, Calc pH or Mass Molarity Calculator?

Calc pH ships an update every 59 months, and Mass Molarity Calculator every 29 months. Most recently, Calc pH was updated on November 1, 2026 and Mass Molarity Calculator on November 7, 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.*