---
title: "UP/1B Calculator - Reviews, Revenue and Downloads in United Kingdom | Apple App Store"
description: "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 throug"
---

# UP/1B Calculator — United Kingdom

![UP/1B Calculator App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/fc/5f/e3/fc5fe3c2-1d90-f4c9-0254-df7114e6f6c2/AppIcon-0-0-1x_U007emarketing-0-8-0-85-220.png/434x0w.png)

**Developer:** [Unknown](https://apptail.io/developer/unknown-bDYb) (United Kingdom)
**Category:** Business
**Rating:** 5.0/5 (4 ratings)
**Price:** Free
**Bundle ID:** uk.co.gassafeguide.gastest
**Store:** Apple App Store
**Country:** United Kingdom
**Version:** 1.1.0 (released 2026-04-28)
**Original Release:** 2026-04-22
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/gb/app/app/id6762639006)
**AppTail Page:** [https://apptail.io/app/up1b-calculator-qLuz/united-kingdom](https://apptail.io/app/up1b-calculator-qLuz/united-kingdom)

## UP/1B Calculator Description
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.

## UP/1B Calculator Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/45/8c/13/458c13ca-61d0-df9d-ae59-0780d5af6fca/IMG_8429.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/4c/31/3c/4c313c4d-0e69-3799-13f6-f85778f242f1/IMG_8432.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/80/10/f7/8010f75c-803a-5fdc-32a3-02a153a7d5ac/IMG_8428.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/71/12/46/7112467a-e329-a64b-8d34-d02dd4c68176/IMG_8433.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/70/a3/08/70a3089d-07ce-e378-63fc-25342c454ee0/IMG_8431.png/1284x2778.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/f3/af/f5/f3aff5c9-b51c-fc90-d0d6-59893ba455ad/IMG_8430.png/1284x2778.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/0a/ac/d1/0aacd14e-bc47-6f39-b241-ab2829395e1d/IMG_8434.png/1284x2778.png)

## UP/1B Calculator Rating Breakdown in United Kingdom
- 5 stars: 4 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)



## UP/1B Calculator Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Paid | United Kingdom | Business | #5 |
| Top Paid | United Kingdom | Overall | #297 |




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