Exercices with eyes closed have strong disadvantages if you want to improve what you do with your eyes open.
The most important one, speaking of proprio-perception, is that your body and head behaves differently when your eyes are closed. You need special attention to your posture to have your head placed as it would if you were opening your eyes. As your eyes are closed you do not really know if they are looking up, down or in front of you.
So you are trying to learn a skill in a different perceptual context than the one where you will be using it, without talking of the fact that cutting your brain from all the visual information he will receive with open eyes does not train it to filter this information effortlessly and concentrate on what is important.
So if you are looking for a shortcut, this is probably not a good idea. You should aim at reinforcing, cumulative skills and you need to allow some time to your brain between acceleration or complexification of exercices.
A key to good sight-reading on piano is proprio-perception of intervals with hands and arms because most of the time you are moving from a known key with your hand to another one you try to each.
A thing you can do easily
Practice interval jumping, eyes open, between two different fingers of the same hand starting with basic seconds, thirds and octaves and then exploring all intervals from all starting point, if possible while reading a sheetmusic corresponding to that. With so many freeware or shareware basic music notation software, you can create and print these exercices.
Practice very slowly and resist the temptation to accelerate one of them before having practiced it four or five different days, ideally at least a week.
When one hand alone is confident in a certain series of moves, play a slow and regular rhythmic routine with the other hand while doing the exercice on the hand you want.
As you are fond of technological devices, here is a low-tech system you can add to your piano: make a rigid and light cardboard rectangle, approximately half the width and the length of the keyboard with ways to attach it firmly to the sheetmusic support of your piano. This will work as a temporary cache of your keyboard without impeding hand movement. Adjust the size according to your situation. It will help you keep your eyes off your hand for one time.
Do not use it too long however, as one of the key skills when sight-reading efficiently is to use peripheral vision to avoid looking directly to your hands while playing.