Big Font (change font size)

Contains adsIn-app purchases
22K 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 25% (smaller) to 500% (bigger).

★ change display zoom ratio on Android 7.0 or greater devices
★ change system text to bold or thin on Android 12.0 or greater devices
★ turns your device into a magnifying glass by using camera zoom, auto-focus, and LED flash
★ 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 by tapping the notification
★ customized the font size scale value

• CAMERA: used for the magnifier function
• WRITE_SETTINGS: change the font size, prevent the screen rotation during the automatic function

You can upgrade to the PRO version by purchasing a PRO license from Google Play. PRO version adds the following additional features:
★ no ads
★ unlimited font scaling values
★ unlimited zoom ratio values
★ unlimited font weight values
★ 251% or above 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 into 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
Apr 27, 2024

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

Ratings and reviews

19.7K 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!
102 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!
98 people found this review helpful
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AZSoft Technology Inc.
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.
A Google user
April 7, 2019
Big Font is a big hit with me! I often switch between using my phone up close and at a distance, and Big Font's included widget (in-app purchase required, which I was more than happy to buy) makes switching text sizes on-the-fly easier than on iPhone! I absolutely would buy again! (Now if only the widget looked a little nicer and the app's interface had some careful, Material Design thought given to it, it would earn that fifth star. . . .)
29 people found this review helpful
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AZSoft Technology Inc.
April 7, 2019
Thanks for trying this app. We hope you have had a good experience with it. Would you please send me an email with your suggestions?

What's new

★ Big Font is now Android 14 compatible
★ send me an email if you'd like to help with the translation
★ bugs fixed and optimizations

★ new "Bold text" feature lets you change system text to be bold or thin. Android 12+ only
★ Bold text: use ADB to grant the WRITE_SECURE_SETTINGS permission is required