iPhone Screenshots


This app is a must for anyone involved in roofing or rain water dispersal.

Are your gutters working as effectively as possible?
Are you finding your gutters overflow and you don't know why?
Are you about to install or select guttering for your new home or extension?
How may litres of water may flow from my roof?

If you answered YES to any of these questions the this application can save you time and help you make the right decisions.

Containing 3 indispensable functions :

Roof Area Calculator
If you need to find out the effective roof area of your roof then by entering in the length, height and selecting an appropriate roof pitch or entering the exact height, you can then calculate the effective roof area in square meters.

Rain Flow Calculator
If you know the effective roof area or have previously calculated the effective roof area then you can determine the rainfall flow in litres per second that will come from your roof. This is invaluable information when deciding the right type of guttering for your roof. We have included the UK average rainfall which is 75mm / hour but you can easily adjust this to your particular circumstance. You can even adjust the effective roof area should you wish to add in a margin for error.

Guttering Helper
By predicting the rainfall flow from your roof, the application will suggest the gutter dimensions from a bank of 7 standard UK sizes that will help accommodate the amount of rain flow predicted. You can select adjust the results to your own circumstance by selected the outlet location and the level of fall.

Please note that this application is for guide purposes only and you should consult a professional when making any decisions based on the results of this application.

While the developers of this application make every effort to deliver high quality products, we do not guarantee that our products are free from defects or errors. Our software is provided “as is," and you use the software at your own risk. We recommend that you seek the advice of a certified professional before drawing any conclusions from any calculations generated from the software.
We make no warranties as to performance, merchantability, fitness for a particular purpose, or any other warranties whether expressed or implied.
No oral or written communication from or information provided shall create a warranty.
Under no circumstances shall the developers of this application be liable for direct, indirect, special, incidental, or consequential damages resulting from the use, misuse, or inability to use this software, even if we have been advised of the possibility of such damages.
The developers of the software cannot accept liability for any loss, damage or injury as a result of using the results generated from our software.

What’s New

Version 3.0.0

Updated UI
Updated to work with recent IOS versions
Added in features requested by users.

Ratings and Reviews

1.5 out of 5
2 Ratings

2 Ratings

Bohicaranch ,

WARNING: Metric only

This might be a great app, but here in the US, we don't use metric measurements, so I just wasted my money…..

tjh4242 ,

Not useful

First problem: Supposedly sizes roof gutters only (not street gutters).

Second problem: The calculation is very simple. No need for an app to do it.

Third problem: As far as roofs go there are only two standard gutter sizes, so the app is not really needed.

Fourth problem: Metric only.

L ric ,


I loaded this app on new iOS It opens and when you hit start. It closes app. Doesn't work. Rip off


Claire Holmes
46.2 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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