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Big Font (change font size) lets you adjust the size of text across your Android system, rather than changing the lettering in just one app. It suits people who regularly find menus and other on-screen text too small, as well as anyone who wants to fit more text on screen. The scale runs from 25% to 500%, with a preview so you can check the result before applying it.
You can set a custom scale and use a notification to see the current font size or switch between sizes with a tap. The notification can also be hidden. On Android 7.0 and later, the app can change display zoom; on Android 12.0 and later, it can adjust system text weight between bold and thin. Those options depend on your Android version, so older devices will not have every control.
The app also includes a magnifier that uses the camera, autofocus and LED flash. That makes it a separate practical tool for looking at small physical details, though it requires camera access. Big Font also needs permission to change system settings for its font controls. If all you need is larger text, the magnifier may simply be an option you leave unused.
Big Font is developed by AZSoft Technology Inc. It has a 4.24 rating from 21,815 reviews and more than 5 million installs, a substantial track record for a focused accessibility-minded tool. Some higher scaling and adjustment options are reserved for the Pro version: the supplied feature details specify font sizes of 251% or more and unlimited scaling values among its additions. Check which controls are available to you before settling on a particular size.
