Appearance and language
Updated Oct 16, 2026 · Applies to Web, iPhone, and Android · All plans
On the web, Appearance switches ChatPEP between light, dark, and your device's setting. On iPhone and on Android, ChatPEP follows the phone's own appearance. Language sets the units your height and weight are shown in, and ChatPEP answers in whatever language you write in.
Appearance
On the web
- Select your name at the bottom of the sidebar, then select Settings.
- Select General.
- Next to Appearance, select one of the three buttons: the monitor matches your device, the sun is light, and the moon is dark.
The app starts in dark until you choose. Your choice is saved in that browser, so another browser or computer keeps its own. Public pages, including this help center, always show in light.
On iPhone
ChatPEP follows the iPhone's Light or Dark appearance. There is no separate switch in the app. To change it, open the iPhone Settings app and go to Display & Brightness.
On Android
ChatPEP follows your phone's dark theme. There is no separate switch in the app. To change it, open your phone's Settings app, go to Display, and turn Dark theme on or off.
Language
Language decides the units for your height and weight. English (US) shows feet, inches, and pounds. Every other choice shows centimeters and kilograms. Until you choose, ChatPEP uses English (US).
It does not translate ChatPEP's screens, and it does not set the language of answers.
On the web
- In Settings, select General.
- Choose a language from the menu next to Language.
On iPhone and on Android
- Open the menu, tap Settings, then tap Language.
- Tap a language.
The language of answers
ChatPEP answers in the language you write your message in, whatever Language is set to. If you switch languages partway through a chat, answers switch with you. See Answers in your language.
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Related articles
- Answers in your languageChatPEP answers in the language you write in. The Language setting only changes the units your measurements are shown in.
- Experience levelChoose Beginner, Familiar, or Expert to set how much ChatPEP explains, and what the setting does not change.
- What ChatPEP knows about you, and how it shapes answersEvery detail ChatPEP uses to fit answers to you, what it leaves out, and where to change each one on the web and in the apps.
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