1. [n.d.]. Envision App — letsenvision.com. https://www.letsenvision.com/app. [n.d.]. Envision App — letsenvision.com. https://www.letsenvision.com/app.
2. [n.d.]. GoodMaps explore. https://www.goodmaps.com/apps/explore [n.d.]. GoodMaps explore. https://www.goodmaps.com/apps/explore
3. [n.d.]. Smart cane for the visually impaired. https://wewalk.io/en/ [n.d.]. Smart cane for the visually impaired. https://wewalk.io/en/
4. [n.d.]. Use Lookout to explore your environment - Android Accessibility Help — support.google.com. https://support.google.com/accessibility/android/answer/9031274. [n.d.]. Use Lookout to explore your environment - Android Accessibility Help — support.google.com. https://support.google.com/accessibility/android/answer/9031274.
5. [n.d.]. Visual interpreting – get live on-demand access to visual information. https://aira.io/ [n.d.]. Visual interpreting – get live on-demand access to visual information. https://aira.io/