Which of these navigation apps is the best?

Hi, I've been searching for information about Blindsquare. However, this app is quite expensive I'd like to know if it is worth purchasing. I have seeing assistant move and loadstone GPS, and also google maps and Apple maps. I've been playing with lazarillo in fact speech output that overlaps with VoiceOver is a bit annoying. Please tell me if is it worth purchasing Blindsquare. to be clear: I want an app for: looking what is around me and the important is that information are up-to-date, giving directions or indicating routes to a selected place, turn-by-turn guidance would be of great value. Thank you all for your assistance.

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