changed from discussion to question

lookup() function is not supported on mobile.

you could use cascaded lookups: product section => product => price, but drawback is that price lookup control will not get populated automatically even if there will be single value, you will have to open it to see price.

but this only way I'm aware of how could it be worked around.

if not supported is it worth voting for it on uservoice?

https://nintex.uservoice.com/forums/229417-6-nintex-mobile-apps/suggestions/12266880-lookup-in-inline-functions

voted.

if it only had any effect ...

Don't give up hope Marian, I've at least 5 of my ideas implemented from scratch from user voice (one's I personally posted) and many more that I voted on.   Though it can take quite a while for it to happen (won't argue with that )

Added my votes for good measure.

yeah, i would say with enough votes it will have an effect - they are definitely looking at the things on uservoice.  I will add some votes now too.

if they look on it they could at least leave there some feedback or status change.

eg. in ' 6 - Nintex Mobile Apps' space, if I select 'Top ideas' the topmost one with 143 votes has no feedback, so it looks like it didn't  attracted nintex at all.

whereas latest on first page with 25 voted has already started implementation.

so I really do not know what are rules to pick an idea for implementation, but it looks like user votes do not get respective weight.

My vote added as well.  I need this. I have several situations where I need to populate ONE value based on a list, that is then used in calculations.

Added my votes. Staggered this is not already in there and disappointed that even with 71 votes this has not even been responded too by Nintex. It's burst my pro-Nintex Bubble that I tweeted about the other day!