# ATTMA Air Tightness App vs PlotBREL

The clearest difference is device support: PlotBREL at 3 against ATTMA Air Tightness App's 1. ATTMA Air Tightness App's advantage is iOS requirement (11.0 vs 15.0). 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 2 months. The most recent releases landed on June 10, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | ATTMA Air Tightness App | PlotBREL |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 30 MB | 46 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AIR TIGHTNESS TESTING & MEASUREMENT ASSOCIATION](https://appshunter.io/developer/1547433680) | [Wwrightapp Ltd](https://appshunter.io/developer/1590507378) |

## What reviewers say

### ATTMA Air Tightness App

[App page](https://appshunter.io/ios/app/attma-air-tightness-app/id1582610316)

This utility app helps organize and complete building air tightness testing according to various industry standards. It allows companies to upload site details for teams, and testers to record building and test information, including photos and deviations, before submitting results for certification.

**Highlights:** Organize building air tightness tests, Complete tests to TSL1, TSL2, CIBSE TM23, ASTM E779-19, BS EN 13829:2001 standards, Upload and allocate site/plot details, Record initial building and test details, Capture photos and preparations, Enter test values, Highlight deviations from test standards, Submit results for certification

**Features:** macOS Compatibility

**In-app purchases:** none


### PlotBREL

[App page](https://appshunter.io/ios/app/plotbrel/id6451210943)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ATTMA Air Tightness App free?

ATTMA Air Tightness App is free to download, with no in-app purchases.

### Is PlotBREL free?

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

### Do ATTMA Air Tightness App or PlotBREL have ads?

Neither ATTMA Air Tightness App nor PlotBREL shows ads.

### Which is updated more often, ATTMA Air Tightness App or PlotBREL?

ATTMA Air Tightness App ships an update every 2 months, and PlotBREL every 2 months. Most recently, ATTMA Air Tightness App was updated on June 10, 2026 and PlotBREL on September 8, 2026.

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