Big Font (change font size)

Contains adsIn-app purchases
21.3K reviews
Content rating
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About this app

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
• WRITE_SETTINGS: change the font size, prevent the screen rotation 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 Müller
Italian - Michele Mondelli
Japanese - Yuanpo Chang
Polish - Dawid Zieliński
Portuguese brazilian - Wagner Santos
Russian - Идрис a.k.a. Мансур (IDris a.k.a. MANsur), Ghost-Unit
Spanish - Tomás de la Puente López
Tagalog - Angelo Laus
Turkish - Kutay KuFTi
Vietnamese - Nguyễn Trung Hậus
Updated on
May 16, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location, App activity and 2 others
Data is encrypted in transit
Data can’t be deleted
21.3K reviews
Greg Searle
December 17, 2021
Does what it says very well. Allows you to change system font size beyond what is available through the Settings app. ADVANCED: If you have ADB, you can also use this app to change the system zoom ratio (requires WRITE_SECURE_SETTINGS permission). My new Samsung would only zoom down to 88%. I wanted to set it 75%, and this app did it. This setting is system-level, so it's permanent and survives restart. You don't need to keep the app notification active. ADS: interstitial pop-up ads. Buy it!
37 people found this review helpful
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Sam Sterling
September 4, 2021
Great app for the "old" and "blind"...LOL. I just have one question since some are being answered here. I am on Android 11 (new to me...was on 8 rooted cust rom for the last 3 years on previous phone) and it works great, But when it reboots, the font is still modified, but the font size goes to the very biggest on the scale and I set it for 2 tics below. Was there a way to make it stay that I missed or is that a bug? It's not a big deal to fix, but maybe it can be looked at? Thanks for the Great little handy app!!! Still gonna give it 5 Stars!
51 people found this review helpful
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Sam Lu
September 5, 2021
I need more information to check what the problem is. Please send me a log by going to: Big Font > Settings > App log > MENU > Email > select Gmail Please describe the problem in the email; otherwise, the system will ignore the log email. Please also attach some screenshots of the problem.
Kevin Diazero
June 23, 2022
Its working but the problem is facebook font doesnt change. Its still big but i change the font in to 60% smaller. Hope itll improve more. (Ex. Whole device, status bar like battery, the time and the facebook also)
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Sam Lu
June 24, 2022
This app hardwires the font size in the code so the font won't be changed after Big Font changed the system font scaling factor. For more information, please go to: Big Font > Settings > About > FAQ If you are using an Android 7.0 or greater device, please use the "Zoom display" function instead. Big Font > top-left navigation menu > Zoom display

What's new

★ Big Font is now Android 12 compatible
★ fixed: UI issues caused by Android 12 2022/03 system patch
★ send me an email if you'd like to help with the translation
★ bugs fixed and optimizations