# MiREG Plus vs Gastite Sizing App

The clearest difference is review sentiment: Gastite Sizing App at 100% against MiREG Plus's 78%. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 15, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | MiREG Plus | Gastite Sizing App |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 77.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | Free |
| Size | 22 MB | 15 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [1st Green Deal Ltd](https://appshunter.io/developer/957356692) | [Gastite Systems Limited](https://appshunter.io/developer/1537998855) |

## What reviewers say

### MiREG Plus

[App page](https://appshunter.io/ios/app/mireg-plus/id1282587493)

This app allows Gas Safe registered engineers to easily register Intergas boilers and generate necessary installation certificates. It streamlines the process for compliance and record-keeping.

**Highlights:** Register Intergas boilers, Produce Benchmark certificate, Generate Gas installation certificate, Installer web-based portal access, Free to use

**Features:** macOS Compatibility

**In-app purchases:** none


### Gastite Sizing App

[App page](https://appshunter.io/ios/app/gastite-sizing-app/id1537998852)

This app simplifies calculating the required size of Gastite® CSST for gas installations. Input gas type, CSST length, and appliance power to instantly determine the correct size. It offers easy navigation, user-friendly design, and access to FAQs and installation guides.

**Highlights:** CSST sizing calculation, Natural gas or LPG selection, Access to FAQs, Downloadable installation guide, User-friendly design, Contact support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MiREG Plus free?

MiREG Plus is free to download, with no in-app purchases.

### Is Gastite Sizing App free?

Gastite Sizing App is free to download, with no in-app purchases.

### Do MiREG Plus or Gastite Sizing App have ads?

Neither MiREG Plus nor Gastite Sizing App shows ads.

### Which is updated more often, MiREG Plus or Gastite Sizing App?

MiREG Plus ships an update every 3 weeks, and Gastite Sizing App every 3 weeks. Most recently, MiREG Plus was updated on September 15, 2026 and Gastite Sizing App on June 5, 2026.

---

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