# HydroTech Pocket Engineer vs MeterWorks Vibrometer

The clearest difference is in-app purchases: HydroTech Pocket Engineer at none against MeterWorks Vibrometer's 1. HydroTech Pocket Engineer also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, update cadence and ads there is nothing between them.

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

HydroTech Pocket Engineer ships an update monthly, MeterWorks Vibrometer every 2 weeks. The most recent releases landed on October 17, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | HydroTech Pocket Engineer | MeterWorks Vibrometer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 3 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [michael schricker](https://appshunter.io/developer/1895753612) | [Emil Deak](https://appshunter.io/developer/1883312248) |

## 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


### MeterWorks Vibrometer

[App page](https://appshunter.io/ios/app/meterworks-vibrometer/id6779408803)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MessWerk Pro | $7.99 | one-time |


## Frequently asked questions

### Is HydroTech Pocket Engineer free?

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

### Is MeterWorks Vibrometer free?

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

### Do HydroTech Pocket Engineer or MeterWorks Vibrometer have ads?

Neither HydroTech Pocket Engineer nor MeterWorks Vibrometer shows ads.

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

HydroTech Pocket Engineer ships an update monthly, and MeterWorks Vibrometer every 2 weeks. Most recently, HydroTech Pocket Engineer was updated on October 17, 2026 and MeterWorks Vibrometer on October 4, 2026.

---

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