# pH vs Sentron

The clearest difference is iOS requirement: pH at 7.1 against Sentron's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

pH ships an update monthly, Sentron every 5 weeks. The most recent releases landed on September 14, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | pH | Sentron |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/sentron/id1623135557/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | — | Free |
| Size | 2 MB | 94 MB |
| Requires iOS | **7.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [taskit](https://appshunter.io/developer/830597040) | [Sentron Europe B.V.](https://appshunter.io/developer/1623135559) |

## What reviewers say

### pH

[App page](https://appshunter.io/ios/app/ph-meter/id830597037)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sentron

[App page](https://appshunter.io/ios/app/sentron/id1623135557)

Transform your mobile device into a sophisticated pH meter. Connect wirelessly to specialized probes for accurate measurements in various applications. The app guides you through calibration, data logging, and export.

**Highlights:** Wireless pH/EC measurement, Bluetooth probe connectivity, Step-by-step calibration, Data logging and graphing, GPS data mapping, Automatic temperature compensation

**In-app purchases:** none


## Frequently asked questions

### Is pH free?

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

### Is Sentron free?

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

### Do pH or Sentron have ads?

Neither pH nor Sentron shows ads.

### Which is updated more often, pH or Sentron?

pH ships an update monthly, and Sentron every 5 weeks. Most recently, pH was updated on September 14, 2026 and Sentron on September 22, 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.*