Download of Grids 8.5.9 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The actual developer of this software for Mac is ThinkTime Creations LLC. The application lies within Communication Tools, more precisely Social & Blogging.
From the developer:
Grids brings the best Instagram experience to your Mac. Features: Clean, adaptive UI. Works at full screen as well as widget-sized window. Pixel-perfect layout and rendering. Retina display support. Your Instagram photos never looked this gorgeous. 4 beautiful layout styles for the pleasure of your eyes Picture size as well as spacing and background color can be adjusted to your liking. Fastest Instagram browsing experience you will have!
You may want to check out more software for Mac, such as Access Grid, Grid Calculator Basic Edition or Defense Grid, which might be similar to Grids.