# traumweber vs pHCalculation

The clearest difference is ads: pHCalculation at none against traumweber's shown. traumweber's advantage is iOS requirement (13.0 vs 18.6). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. traumweber sells 1 one-off in-app purchase and pHCalculation sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

traumweber ships an update every 8 days, pHCalculation every 5 days. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | traumweber | pHCalculation |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 8 days | **Every 5 days** |
| Size | 61 MB | 2 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Alldone GmbH](https://appshunter.io/developer/1729417012) | [Jatuphol Jaturapat](https://appshunter.io/developer/1788860463) |

## What reviewers say

### traumweber

[App page](https://appshunter.io/ios/app/traumweber-bed-time-stories/id6478536147)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1000 Credits | $3.99 | one-time |


### 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 traumweber free?

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

### Is pHCalculation free?

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

### Do traumweber or pHCalculation have ads?

traumweber shows ads; pHCalculation does not.

### Which is updated more often, traumweber or pHCalculation?

traumweber ships an update every 8 days, and pHCalculation every 5 days. Most recently, traumweber was updated on October 25, 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.*