A: Just like Windows (PC) systems use an .exe file for installing software, Android does the same. An APK file is the file format used for installing software on the Android operating system.
Q: If I install an APK from this website, will I be able to update the app from the Play Store?
A: Yes, absolutely. The Play Store installs APKs it downloads from Google's servers, and sideloading from a site like ApkClean.net goes through a very similar process, except you're the one performing the downloading and initiating the installation (sideloading). As soon as the Play Store finds a version of the app newer than the one you've sideloaded, it will commence an update.
Q: Why ApkClean.net can guarantee APK 100% safe?
A: Whenever someone wants to download an APK file from ApkClean.net, we'll check the corresponding APK file on Google Play and allow user download it directly (of course, we'll cache it on our server). If the APK file does not exist on Google Play, we'll search it in our cache.
Q: What are Android App permissions?
A: Apps require access to certain systems within your device. When you install an application, you are notified of all of the permissions required to run that application.
Don't hesitate to contact us if you have any questions or concerns.
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User's Reivew
4 ★Excellent, challenging but also intuitive game. Beautifully designed. Only serious issue is it's better for tablet than phone. The controls and very fine angles required to 'win' can difficult to find/select on a small screen.
5 ★Best game I played in a long time. I was kinda expecting it's steep learning curve from the first levels to continue but the last 3 modes seemed a bit less creative. They were relatively easy. Still it was very entertaining. I loved it.
2 ★Bit of a compacted mess. Maybe people like it because it makes them feel smart? Didn't get far, 2nd chapter #1 realized probably will just irritate me. Keep fiddling with it and it'll go, eventually? Think my fingers are too big, along with the giant rotation circles that'll make you mess up what was already meticulously placed. Good effort developer, keep at it
2 ★It's an alright concept but the controls are terrible. The game requires fine movements of the reflective slides and carefully planned, minute adjustments but you can't make those adjustments because the slides require you to drag them in order to select them for moving. You'll go to adjust the position by millimeters and find you have to drag it in one direction for a half inch before the slide registers that you're moving it and that can message up your positioning. Next the light Ray's don't change in real time. If you're adjusting by an angle you can see where the beam will go but if you're positioning the slide the beam will remain in place as though it's still hitting the slide you're currently moving. This app requires a LOT of work before it'll be fun to play and that's a shame because I love the concept.
5 ★Very well designed game. Creative concept, cute and elegant graphics, carefully crafted levels. The easier levels provide very good introduction and familiarization with the intuitive controls. On the other hand, some later levels are actually quite difficult and require some ingenuity. Try using fewer lenses than provided to challenge yourself!
5 ★This is quite a challenging puzzle game, but there are more of those. What sets this game apart is a very elegant, beautiful yet minimalistic UI of the in-game menus. The complete absence of app permission requests is probably also unique as far as games go.
5 ★I really like the idea. I feel like really good work was invested in the optics engine. Also I don't remember the game ever asking me to rate it. I am glad to see such great work available. Cheers!
3 ★The areas of review which a person rates are woefully inadequate to provide a proper overview of the game being evaluated. There needs to a category about the DIRECTIONS for playing the game. Of all the games I have played from Google play Glass by far provides the worst directions for playing the game. Even at just the second level I had no clue what I was expected to do. My rating is purely for the game play, graphics etc because there is no category for explanation or directions for the game which were completely lacking!!
5 ★The game is one of the very few games that got my attention to the point where I would have fun all the way to the end. It wasn't too hard but had some tricky levels here and there, which brought some next level challange and required focus and some outside-the-box thinking. Solid 4 hours of playtime minimum.
5 ★Very well designed and challenging; there's no "luck" involved at all as another reviewer claims, but it requires solid spatial reasoning skills...too bad there hasn't been an update in 2 years, was willing to pay for expansion pack of puzzles. Seems to have been abandoned, even the FB page hasn't been updated in 2 years. Worth playing even still. If the developer does come back, please include the option to save puzzle state, some take a LOT of planning and are difficult to complete in a 15 minute sitting.
5 ★Truly challenging. No money grabbing hints to buy or special items. Just a purely puzzling collection of increasingly difficult levels. I love it.
5 ★One of the best puzzle games on the play store. The levels are challenging. The graphics are nice, and it is also nice to not be bombarded by ads as soon as you open the game. "Loved it" is an understatement.
![Material Glass Substratum [Legacy] APK](https://lh3.googleusercontent.com/U604ZcnngXR4vfBrZX60aXEuET5WlmD7PTp2sdAxCB6S_2r6zlgL2J4kp0fWGl72gqfx=s80)
