No, you don't need an Apple device to use iCloud.
While iCloud is primarily associated with Apple products, it's also accessible through web browsers on Windows computers and even Android devices.
You can access iCloud services like iCloud.com, iCloud Drive, iCloud Mail, and iCloud Photos from any computer or mobile device with an internet connection.
However, some features like iCloud Keychain or Find My iPhone are limited to Apple devices.
To use iCloud, you need an Apple ID, which is a free account you create on Apple's website.
Once you have an Apple ID, you can sign in to iCloud on any supported device or web browser.
You can then use iCloud to store your data, access your files, and keep your devices synchronized.