# Hydro Test Pressure vs Temp Master

The clearest difference is price: Temp Master at Free against Hydro Test Pressure's $1.99. Temp Master also leads on update cadence (every 5 weeks vs every 73 months) and iOS requirement (11.0 vs 18.5). On ads, in-app purchases and device support there is nothing between them.

Temp Master is free to download; Hydro Test Pressure costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Hydro Test Pressure ships an update every 73 months, Temp Master every 5 weeks. The most recent releases landed on September 15, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Hydro Test Pressure | Temp Master |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[3.2 (12 ratings)](https://appshunter.io/ios/app/temp-master/id6737321665/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 73 months | **Every 5 weeks** |
| Monetization | — | Free |
| Size | 1 MB | 43 MB |
| Requires iOS | 18.5 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Imran Pinjara](https://appshunter.io/developer/1484488781) | [Thermal Master Technology Co.,Ltd.](https://appshunter.io/developer/1770222118) |

## What reviewers say

### Hydro Test Pressure

[App page](https://appshunter.io/ios/app/hydro-test-pressure/id1491873084)

**Features:** macOS Compatibility

**In-app purchases:** none


### Temp Master

[App page](https://appshunter.io/ios/app/temp-master/id6737321665)

This utility app enhances thermal imaging capabilities for compatible Thermal Master devices, offering precise temperature detection and advanced image analysis. It allows users to view, save, and export thermal data offline, with features like digital zoom and improved resolution for various inspection tasks.

**Highlights:** High-accuracy temperature detection, Enhanced infrared resolution, Offline data viewing and export, Up to 15x digital zoom, Reduced background noise, Long battery life optimization

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hydro Test Pressure free?

Hydro Test Pressure costs $1.99, with no in-app purchases.

### Is Temp Master free?

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

### Do Hydro Test Pressure or Temp Master have ads?

Neither Hydro Test Pressure nor Temp Master shows ads.

### Which is updated more often, Hydro Test Pressure or Temp Master?

Hydro Test Pressure ships an update every 73 months, and Temp Master every 5 weeks. Most recently, Hydro Test Pressure was updated on September 15, 2026 and Temp Master on October 1, 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.*