# Impari Citric vs pHCalculation

The clearest difference is price: pHCalculation at Free against Impari Citric's $1.99. pHCalculation also leads on update cadence (every 5 days vs every 10 days). Impari Citric's advantage is in-app purchases (none vs 5) and iOS requirement (16.6 vs 18.6). On ads and device support there is nothing between them.

pHCalculation is free to download; Impari Citric costs $1.99 up front. pHCalculation sells 5 one-off in-app purchases. Impari Citric asks for nothing beyond the download.

Impari Citric ships an update every 10 days, pHCalculation every 5 days. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Impari Citric | pHCalculation |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 5 days** |
| Size | 4 MB | 2 MB |
| Requires iOS | **16.6** | 18.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [David Orgeman](https://appshunter.io/developer/1545166417) | [Jatuphol Jaturapat](https://appshunter.io/developer/1788860463) |

## What reviewers say

### Impari Citric

[App page](https://appshunter.io/ios/app/impari-citric/id1552787092)

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

**In-app purchases:** none


### pHCalculation

[App page](https://appshunter.io/ios/app/phcalculation/id6743737030)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Show solution | $0.99 | one-time |
| Buffer Calculator | $0.99 | one-time |
| Salt pH calculator | $0.99 | one-time |
| Reverse pH calculator | $0.99 | one-time |
| Unlock All Features. | $1.99 | one-time |


## Frequently asked questions

### Is Impari Citric free?

Impari Citric costs $1.99, with no in-app purchases.

### Is pHCalculation free?

pHCalculation is free to download, with in-app purchases available.

### Do Impari Citric or pHCalculation have ads?

Neither Impari Citric nor pHCalculation shows ads.

### Which is updated more often, Impari Citric or pHCalculation?

Impari Citric ships an update every 10 days, and pHCalculation every 5 days. Most recently, Impari Citric was updated on October 2, 2026 and pHCalculation on October 9, 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.*