* User-defined criteria for the question “What electronic travel aids (smartphone apps, navigation devices,…) do you use for orientation/navigation indoors?”: 22C#1-Aipoly Vision, 22C#2-Envision AI, 22C#3-Be my Eyes, 22C#4-don't use any device and app, 22C#5-don't work in the country, 22C#6-Brigo, 22C#7-Seeing Eye, 22C#8-white cane, 22C#9-Beacons option, 22C#10-phone (to enlarge the text), 22C#11-Google Maps.

** User-defined criteria for the question, “If you would consider creating a novel technological aid for navigation indoors, what functions would be the most important to you?”: 26C#1-interactive tactile map to the destination, including direction information (e.g., elevator, stairs, entrance, room numbers, exit, etc.); 26C#2-don't need; 26C#3-nearby objects recognition; 26C#4-text reading; 26C#5-photo reading; 26C#6-follow Bluetooth-labeled objects; 26C#7-above the head, left/right side, detectors for distance measurement; 26C#8-receipt ticket; 26C#9-find goods in the shop with tactile map.