# HydroTech Pocket Engineer — & Client Portal

> & Client Portal (iPhone/iPad app by michael schricker.)

- Source: https://appshunter.io/ios/app/hydrotech-pocket-engineer/id6764373443 (this page in markdown: same URL + `.md`)
- Developer: [michael schricker](https://appshunter.io/developer/1895753612)
- Category: Utilities, Education
- Price: Free
- Age rating: 17+
- Requires: iOS 15.0 · 3 MB
- Languages: English
- Released: 2026-04-30
- Data updated: 2026-06-25
- User reviews in markdown: https://appshunter.io/ios/app/hydrotech-pocket-engineer/id6764373443/reviews.md

## What is HydroTech Pocket Engineer?

HydroTech Pocket Engineer gives field operators and engineers instant access to essential pipeline and nitrogen calculators directly from their phone.

Built for real-world jobsite conditions, Pocket Engineer is designed to deliver fast, accurate results when timing, safety, and precision matter most. Whether you’re planning a job, verifying calculations in the field, or making quick decisions under pressure, this tool puts HydroTech’s proven calculation methods in your pocket.

Key Features

• Pipeline volume calculations for fast job planning
• Nitrogen calculations for purging and testing
• Clean, mobile-friendly interface built for field use
• Instant access with no complicated setup
• Always up to date with the latest HydroTech tools

Built for the Field

Pocket Engineer is designed for operators, technicians, and engineers working in pipeline testing, pre-commissioning, and field operations. It eliminates the need for manual calculations and reduces the risk of error in critical workflows.

Powered by HydroTech

Developed by HydroTech Testing, this app extends the same tools and methodologies used on active job sites into a simple, mobile-first experience.


## Version history (last 3 releases)

### 3 — 2026-06-18

Version 3.0 — Major Update

New N₂ Trailer Tube Plan tab — plan a job across all 16 trailer cylinders. Set each bottle's PSI, see which ones the job uses, and how much is left over.

Linked or Independent Trailer mode — use the trailer planner with a pipeline test from the N₂ tab, or use it alone to answer "how much product is on board?" without running a test.

Tests Remaining calculator — see how many more tests this trailer can complete before it needs a refill.

Bottle status at a glance — color-coded rings and text labels (Available, Partial, Used, Empty, Low) across all 16 cylinders.

Faster scenario modeling — preset fills, ±100/±500 PSI nudges, scenario buttons like Empty Top 4 and 50% Fill.

Step-by-step calculation breakdown — see each bottle's contribution and how it raises the pipe pressure.

Real-gas math across the full 0–8,500 PSI range, with recommended fill (6,500 PSI) and operating max (8,500 PSI) shown right on the cylinder grid.

Plus iPhone 14 Pro Max layout fixes and dozens of polish improvements.

### 2 — 2026-05-28

New: N₂ Trailer Tube Plan — plan a job across all 16 trailer cylinders, set each tank's pressure, and see which tanks get used and how much N₂ is left over. Plus improved nitrogen volume accuracy and a refreshed supply-options comparison.

### 1.0 — 2026-04-30

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*