We carry out various surveys from face to face interviews to the comprehensive recording of infrastructure for cycling.
We use various devices from different manufacturers (LG, Samsung, oneplus, Range Rover.
The purpose of your investigation is important.
For face-to-face interviews, devices for less than € 100 are easily enough.
For capturing with photos and GPS, I would rely on more expensive devices.
These should have a large battery, the photo quality should be good and GPS should be fast and precise. It should also be waterproof.
The prices begins at 300/400 € and the sky is the limit.
My most used buying guides are the websites of
For medium or high-end smartphones.
For the cheap devices I search on Google with the search term: smartphone up to 100 €.
Corresponding pages of tech blogs then appear