Screen Magnifiers/Readers
Screen magnifier programs allow magnification of all content on the screen. Some magnifiers may also have screen reading capability, allowing speech feedback along with the magnified text.
Magnification utilities are available on portable devices and for computer based access. Although most of these devices have built-in access third party software are often used for more advanced use with a number of additional features.
Built-into device/browser
Apple
Here are a variety of tools built into the Mac OS for those with visual impairments. In iOS, one can turn your device into a magnifying glass or simply magnify the screen with display zoom.
Windows
Android
Software
Third party software allows for magnification of text with screen reader options. The use of these products and all of the products mentioned specific to user needs and should be assessed accordingly.
ZoomText - AiSquared magnification for Mac and Windows operating systems