While current apps rely on Pepper's Ghost illusions, the future is real. Android 15 and newer flagship phones (like the Samsung Galaxy S24 Ultra and Google Pixel 9 series) are integrating displays. Future "holo flash" apps will likely use depth cameras to project light directly into the air, removing the need for a plastic pyramid.
To protect device security and data, download such apps only from official stores: holo flash projector app download for android
If you are looking for a way to use your phone for projection, here are the genuine methods: While current apps rely on Pepper's Ghost illusions,