The NESO App User Reviews

The NESO App
The NESO App
National Energy System Operator Limited

Top reviews

Not granular enough

The app only shows end & solar, no mention of Hydro, a major generator in Northern Scotland

Missing Regional When To Use

I was sent to this app by the WhenToPlugIn app, which has now shut down. Unfortunately this app does not replace it, since it doesn’t show the next best times to use electricity based on regional predictions or current data - only national.

Interesting - but records not updated???

Interesting app.
But please check the records are updated correctly? Solar records is from’23. Grid data suggests solar output exceeded that level multiple times in March ‘25.

Water ?

Colour palette somewhat better now thanks BUT what happened to water as a source ? I never see any hydro on the grid anywhere using this app. Surely that can’t be right ?!

Serious errors

What???? 10971 MW is equivalent to 219,400 5W lightbulbs????

More like 2,194,200,000 5W lightbulbs!!!!

Used to be good but …

… added another star as the colour scheme is slightly improved but it’s still not great.

Colours confusing

I used to love this app. Still do; in principle. But the latest colour change makes it very hard, at a glance, to see which energy source is which. Please change it back. Or at least make the colours more discernible. Thank you.

Text basically impossible to read!

Impossible to read! Since the recent update it’s even more difficult or impossible to read the small text - the colours are also irrelevant. Please make it better than before, not worse!

Please change the colours

I get that you are using corporate colours, but it is really hard to differentiate the gas from wind etc. please change the colours to something more logical and differentiated.

For the Love of God change the colours back!

I use this App to judge the best time to use electricity and also charge my Hybrid car for minimum environmental impact.
Since the latest App update they have made it incredibly difficult to discern which source of Electricity is from what source as the colours chosen are completely illogical. Light purple for Gas, Dark purple for Wind!? So is wind more polluting that Gas? That’s what the colours say to me! Imports are Blue, water isn’t!? Solar is dark blue? Why not yellow or orange? Make the colours represent either reality or their Eco impact. Black for Biomass, Brown for Gas, blue for water, green for wind, yellow for solar, Orange or Purple for imports etc. I shouldn’t have to decode the App before I use it to decide if it is a good time to use green electricity. Help us help you!
What I would really like to see is the daily/weekly/monthly running totals for each kind of electricity production technique with a running total for the CO2 produced to generate the electricity.
I want to be able to see and compare how much each individual type (wind/solar/water/nuclear/gas etc) has produced and what CO2 it has cost us. Ideally by country area but defo in total per country. Live data on this would be excellent as well. A display of total electricity demand Vs system provided would be an interesting readout.
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Poor colour choices

As part of the recent rebrand they have changed the colours on the energy mix pie chart which makes it really hard to distinguish between the colours. Please go back to the old colours. I can barely see the difference between Nuclear and gas.

Bad choice of colours

I can imagine the NESO executives’ hearts sinking when they saw the no doubt expensive redesign of this app, which takes a simple, pleasing thing and makes it worse for no good reason. And I can imagine them thinking: ‘We’re too busy to object to this, it doesn’t matter.’ Why these colours? Why is the only green colour biomass, the most dubious of all ‘renewable’ sources? Did Drax design this? Why is wind almost the colour of coal, and almost impossible on a phone to distinguish from nuclear, which is also a gloomy colour? Why are wind and gas two shades of purple? I don’t get it. Nutty.
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New colours are misleading 🙈

I understand new branding needs to apply but no to the colour code for energy mix or carbon scale!

Different shades of purple make no sense and currently the only green energy source is biomass so misleading.

Also the app support link doesn’t work currently.

Terrible colours

Nuclear is black
Wind is almost black with tad of purple
Gas is purple
Import is light blue
Biomass light green
Water is light purple
Solar is petrol blue

Just below you have carbon impact A with green, E with black

Makes so much sense /s

How to make an app useless is 10sec

However pushed this design should take the door.

Can we have them from green to purple based on how green it is???
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Abysmal!! Awful! Terrible!!

What plank came up with the new colour scheme?

Update Has Ruined This App

The update to this app has made it unreadable.

You’ve gone from bright colour for each energy source and thick wedge of colour in the circle. Too the top 3 energy production methods almost all the same colour and the circle now has a thin line.

You’ve ruined this useful app.

Terrible colour scheme but useful info

Please change back the colour scheme for GB generation mix and our carbon impact sections.

Terrible colours chosen difficult to distinguish between different energy sources.

Why is biomass green??? Random!

Brand guidelines update is hideous and unfriendly

Update to the App (from the beautifully coloured NGESO app) to comply with NESO brand guidelines is a disaster.

It’s really hard to tell the muddy colours apart. The darkest dirtiest colours are applied to the cleanest electricity sources.

Please revert the colours to the ones previously used - this way the data visualisations will be useable again.
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Colours used

Who in their right mind came up with the rubbish new colour system. Biomes shows as a bright green and coal and wind both very similar dark colours. I suggest your interface design person is asked to find new employment

Not colourblind friendly

The latest update has new colours but sadly for people who are colourblind, this is a big step backwards as the new colours are very hard to distinguish.