# UP/1B Calculator

> Gas pipework tightness testing and calculation tool for registered engineers. (iPhone/iPad app by Little App Company.)

- Source: https://appshunter.io/ios/app/up1b-calculator/id6762639006 (this page in markdown: same URL + `.md`)
- Developer: [Little App Company](https://appshunter.io/developer/406182284)
- Category: Business
- Price: Free
- Rating: 5.00/5 from 4 App Store ratings
- Age rating: 4+
- Requires: iOS 16.0 · 21 MB
- Languages: English
- Released: 2026-04-22
- Data updated: 2026-08-31
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/up1b-calculator/id6762639006/reviews.md

## What is UP/1B Calculator?

UP/1B Calculator is a step-by-step guide and calculation tool for Gas Safe registered engineers carrying out installation pipework tightness testing to IGEM/UP/1B Edition 4.

The app guides you through every stage of the tightness test procedure:
• Installation Volume Test (IVt) — calculates the correct test pressure and acceptable pressure drop for the installation size
• Let-By Test — checks for meter regulator let-by
• Tightness Test — records pressure readings and determines pass or fail
• LDF Check — guides leak detection fluid testing of all disturbed joints
• Purge — calculates purge volume for safe gas release
• PDF Record — generates a professional gas tightness test record ready to save or share
Designed specifically for natural gas, LPG and LPG/Air in accordance with IGEM/UP/1B Edition 4.
All test records are saved to your account and sync across devices.
For use by Gas Safe registered engineers only.

## Key features

- Step-by-step tightness test guide
- Installation Volume Test calculations
- Let-By Test checks
- Leak Detection Fluid (LDF) guidance
- Purge volume calculations
- PDF record generation
- Cross-device syncing


## Frequently asked questions about UP/1B Calculator

### What is UP/1B Calculator used for?

UP/1B Calculator is a tool for Gas Safe registered engineers to perform installation pipework tightness testing according to IGEM/UP/1B Edition 4. It guides users through various tests and generates professional records.

### Does UP/1B Calculator support different gas types?

Yes, UP/1B Calculator is designed for natural gas, LPG, and LPG/Air, adhering to the IGEM/UP/1B Edition 4 standard.

### Can I save and share test records with UP/1B Calculator?

Absolutely. The app generates professional PDF records of tightness tests that can be saved and shared directly.

### How does UP/1B Calculator handle data across devices?

All test records are saved to your account and sync automatically across all your devices, ensuring your data is always accessible.

### What is the age rating for UP/1B Calculator?

UP/1B Calculator has an age rating of 4+, making it suitable for users of all ages who meet the professional requirements.

### How often is UP/1B Calculator updated?

The latest version, 1.1.0, was released on April 28, 2026, indicating recent development and support for the application.

### What makes UP/1B Calculator stand out from other gas safety tools?

Its specific focus on IGEM/UP/1B Edition 4, step-by-step guidance for each test phase, and professional PDF record generation offer a comprehensive solution for registered engineers.

### Is UP/1B Calculator available on multiple platforms?

The provided data does not specify platform compatibility beyond its general availability as a mobile application. Users should check their respective app stores for device compatibility.

## Version history (last 1 release)

### 1.1.0 — 2026-04-28

- You can now do a password reset 
- Added an address lookup, just start typing an address and it will give you a matching list to select from (requires internet for this to work).
- Improved Saving prompt
- New unique job reference numbering so references are unique always
- Delete any jobs from the previous job screen by pressing and holding
- Prompt to enter an address if you forget

## More apps by Little App Company

- [Gas Rate Calculator](https://appshunter.io/ios/app/gas-rate-calculator/id406389136)
- [Master Gas - Engineer Software](https://appshunter.io/ios/app/master-gas-engineer-software/id720784716)

All apps by Little App Company: https://appshunter.io/developer/406182284

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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 2026-08-31.*