Big Font (change font size)

Contains adsIn-app purchases
21.7K 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
Jan 29, 2023

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
21.7K 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!
69 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!
65 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.
tin man
December 1, 2022
01/12/22. No longer works in Android 10 Go Edition, Alcatel 1B 2020 32GB. Error - The device disallows you to change the system font. Only allows an increase to 130% which is still tiny on Alcatel 1B 2020 32GB with Android 10 - 10 GO edition. Even with system font on largest setting. Zoom function doesn't work. I contacted Alcatel about patch with info provided by dev. Alcatel (TCL) reply - "Hi, the patch you mentioned is for android R, android Q does not have this". Contacted Google, no reply.
107 people found this review helpful
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Sam Lu
November 25, 2021
UPDATE: we should have sent you an email. Please forward it to Alcatel. AGAIN, IT'S A SYSTEM ISSUE, NOTING DEVELOPERS CAN DO ABOUT THIS. For how to get the new system patch, please contact the device manufacturer (

What's new

★ fixed: the Set Font shortcut may not be launched by a 3rd party app on Android 13 devices
★ send me an email if you'd like to help with the translation
★ bugs fixed and optimizations