---
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:** [Stephen Lalor](https://apptail.io/developer/stephen-lalor-bDYb) (United Kingdom)
**Category:** Business
**Rating:** 5.0/5 (6 ratings)
**Price:** £8.99
**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: 6 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)

## UP/1B Calculator Reviews in United Kingdom

### ***** "Tightness Testing Made Effortless 👍"
Absolutely brilliant app. It takes what can be a fairly involved process under IGEM/UP/1B Edition 4 and turns it into something straightforward and stress-free.

The step-by-step layout is spot on, clear, logical, and very easy to follow, even on a busy job. Everything from IVt calculations through to tightness testing and purging is handled seamlessly, with no second guessing or flicking through paperwork.

What really stands out is how user-friendly it is. You’re guided through each stage in a way that feels natural, and the built-in calculations remove any room for error. The PDF record generation is a huge bonus too, professional, tidy, and ready to send straight away.

This has quickly become an essential tool. Saves time, boosts confidence, and ensures everything is done by the book.

Highly recommended for any Gas Safe engineer working to the new standard.
-- Watto🤘🏻, 2026-04-27

### ***** "Gas engineer"
Really impressed with this app, used it for the first time today and was easy to navigate and certificate at the end was a bonus!
-- Gold BoilerCare, 2026-04-26

### ***** "Up/1b"
Excellent app
-- Becabobs, 2026-04-23

[View all UP/1B Calculator reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)


## UP/1B Calculator Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Paid | United Kingdom | Business | #1 |
| Top Paid | United Kingdom | Overall | #46 |

## UP/1B Calculator Discovered Keywords
- up/1b calculator

## Apps Similar to UP/1B Calculator
- [GB Gas Rate Calculator](https://apptail.io/app/gb-gas-rate-calculator-Ohd/united-kingdom)
- [Boiler Fault Codes](https://apptail.io/app/boiler-fault-codes-yMYb/united-kingdom)
- [HxARBooks](https://apptail.io/app/hxarbooks-jFIx/united-kingdom)
- [Hammerquote AI Cost Estimator](https://apptail.io/app/hammerquote-ai-cost-estimator-KAAz/united-kingdom)
- [Pro Gas Volume Calculator](https://apptail.io/app/pro-gas-volume-calculator-xLBz/united-kingdom)
- [BoilerFix AI](https://apptail.io/app/boilerfix-ai-ARBz/united-kingdom)
- [Commercial Gas Toolkit](https://apptail.io/app/commercial-gas-toolkit-utPz/united-kingdom)
- [GES Gas Pipe Sizing Calculator](https://apptail.io/app/ges-gas-pipe-sizing-calculator-veFA/united-kingdom)
- [TightnessPro](https://apptail.io/app/tightnesspro-uxpB/united-kingdom)
- [Flint: Boiler Onsite Guide](https://apptail.io/app/flint-boiler-onsite-guide-JlzB/united-kingdom)


---

## About AppTail

[AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends.

- [Search Apps](https://apptail.io)
- [Top Charts](https://apptail.io/top-iphone-apps)
- [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer)

*Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*