This review is based on the mobile InstantWest site, that is not designed as a native app. As an alternative, a web browser-based web app is at your disposal. The usage of such a mobile casino is straightforward because of the fact that you do not have to download an app via App Store or apk. You are only required to go to the official website with your smartphone or tablet. All devices, including your Android smartphone, iPhone or tablet, can open the official site correctly as the official site is developed responsively. See the chart below for a list of compatible devices.
A native application would require you to regularly install updates or possibly even the recent apk. Thus, you could be confronted with potential safety hazards even with InstantWest as a trustworthy operator. So, you should never download Apple Swift App files or APK files from websites other than original sources or Google Play and Apple App Store. This also applies for downloading any other app. Other than that, programming so many games (again: 939+) into one native app is an extremely complex technical challenge. But, an upside of the SSL256 encoded InstantWest progressive app is that you can conveniently utilize it with all devices with Safari, Chrome, Firefox or another HTML5 browser.
With a current portfolio of 10 software providers, e.g. NetEnt, Yggdrasil and iSoftBet, you are able to choose from a large choice of slots. On top of 3D slots the app also offers live dealer (e.g. from NetEnt or Evolution Gaming) at the mobile app.