Big Font (change font size/display size) for Android

By CrucialSoft Free

Developer's Description

Does the default system font look too small or too large? Do you want to globally change the text size?

This app allows you to scale system font size from 20% (smaller) to 1000% (bigger).

*** Over 3,000,000 Downloads! ***


change display zoom ratio on Android 7.0 or greater devices

turns your device into a magnifying glass by using camera zoom, auto-focus and LED flash

working for Android 2.3 and greater devices

scale system font size from 20% to 1000%

preview the scaled text before applying

show a notification icon describing the current font size. An option is also provided to hide it

switch system font size via tapping the notification

customized the font size scale value

Android 4+ only provides 3 scaling values, we provide more

for Android 2.3~3.x users. You can add "not working" apps into the ignored apps list


- CAMERA: used for the magnifier function

- BIND_ACCESSIBILITY_SERVICE: this app uses Accessibility services to automate the function (e.g. change display size), optional. It helps those who have difficulty in tapping and complete the task easier

- WRITE_SETTINGS: change the font size, prevent the screen rotation during the automatic function

- SYSTEM_ALERT_WINDOW: draw a wait screen above other apps during the automatic function


You can upgrade to PRO version by purchasing a PRO license from Google Play. PRO version adds the following additional features:

no ads

unlimited font scaling values

251%~1000% font size

We have been selected as a Google I/O 2011 Developer Sandbox partner, for its innovative design and advanced technology.

If you are interested in helping us to translate this app to your native language, please let me know. Thanks.


Arabic - Ibrahim almamo

Danish - Christian Stangegaard Kappelgaard

Dutch - Niko Strijbol

French - Alex...

German - Michel Muller

Italian - Michele Mondelli

Japanese - Yuanpo Chang

Polish - Dawid Zielinski

Portuguese brazilian - Wagner Santos

Russian - a.k.a. (IDris a.k.a. MANsur), Ghost-Unit

Spanish - Tomas de la Puente Lopez

Turkish - Kutay KuFTi

Vietnamese - Nguyn Trung Hus

Full Specifications

What's new in version 3.11


improve the speed of "Zoom display" function

show a warning if "Don't keep activities" developer option is checked

send me an email if you'd like to help the translation

bugs fixed and optimizations


new change font size 1x1 widget which enables you to change the system font size with 1-tap

improve the app startup time

add an Email button for sending the content of About window

fixed: should not show 1x1 widget as 2x2 on some launchers


Release November 12, 2018
Date Added November 12, 2018
Version 3.11

Operating Systems

Operating Systems Android
Additional Requirements None


Total Downloads 665
Downloads Last Week 0
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