# dnatrans vs pHCalculation

The clearest difference is in-app purchases: dnatrans at none against pHCalculation's 5. dnatrans also leads on iOS requirement (15.0 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. pHCalculation sells 5 one-off in-app purchases. dnatrans asks for nothing beyond the download.

dnatrans ships an update every 3 days, pHCalculation every 5 days. The most recent releases landed on September 29, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | dnatrans | pHCalculation |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Size | 1 MB | 2 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [光辉 陈](https://appshunter.io/developer/1532771483) | [Jatuphol Jaturapat](https://appshunter.io/developer/1788860463) |

## What reviewers say

### dnatrans

[App page](https://appshunter.io/ios/app/dnatrans/id1621064860)

**Features:** macOS Compatibility

**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 dnatrans free?

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

### Is pHCalculation free?

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

### Do dnatrans or pHCalculation have ads?

Neither dnatrans nor pHCalculation shows ads.

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

dnatrans ships an update every 3 days, and pHCalculation every 5 days. Most recently, dnatrans was updated on September 29, 2026 and pHCalculation on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*