# HydroTech Pocket Engineer vs VibroMeter

The clearest difference is in-app purchases: HydroTech Pocket Engineer at none against VibroMeter's 1. HydroTech Pocket Engineer also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. VibroMeter sells 1 one-off in-app purchase. HydroTech Pocket Engineer asks for nothing beyond the download.

HydroTech Pocket Engineer ships an update monthly, VibroMeter every 2 weeks. The most recent releases landed on October 1, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | HydroTech Pocket Engineer | VibroMeter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 3 MB | 3 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [michael schricker](https://appshunter.io/developer/1895753612) | [景珂 陈](https://appshunter.io/developer/620312170) |

## What reviewers say

### HydroTech Pocket Engineer

[App page](https://appshunter.io/ios/app/hydrotech-pocket-engineer/id6764373443)

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

**In-app purchases:** none


### VibroMeter

[App page](https://appshunter.io/ios/app/vibrometer-vibration-meter/id6799438272)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VibroMeter Pro | $9.99 | one-time |


## Frequently asked questions

### Is HydroTech Pocket Engineer free?

HydroTech Pocket Engineer is free to download, with no in-app purchases.

### Is VibroMeter free?

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

### Do HydroTech Pocket Engineer or VibroMeter have ads?

VibroMeter shows ads; HydroTech Pocket Engineer does not.

### Which is updated more often, HydroTech Pocket Engineer or VibroMeter?

HydroTech Pocket Engineer ships an update monthly, and VibroMeter every 2 weeks. Most recently, HydroTech Pocket Engineer was updated on October 1, 2026 and VibroMeter on October 17, 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.*