Android phone application for RF measure ( LTE & NR )

Tools
2

Try NSGuru, best one.

Even better than TEMS or NEMO.
It will export dlf files.

Cost is 50 usd per month for license (Free of charge for just for monitoring)
Also needs Qualcomm chip and root access

But you can use it free without recording logs

Check link to download in our old conversation here: How to get CELLID of cells from other Networks? - #9 by RFSpecialist