How CleanMaster Cleans Up Your iPhone 100% On-Device

TL;DR

Every CleanMaster operation — duplicate scans, video compression, contact matching, the vault — runs 100% on-device with no account, no cloud uploads, and no analytics SDKs, so your photos, videos, and contacts never leave your phone.

Why it’s fully on-device

Photo and video scans run locally against your library.
Video compression uses on-device HEVC encoding.
Contact matching happens on the phone — nothing uploaded.
The Secret Vault encrypts media locally (AES-GCM, Keychain-backed).
There’s no account, no cloud, and no analytics SDK in the loop.

Why it works this way

A cleanup app touches your most personal data — every photo, video, and contact you have. Sending that to a server to be “analyzed” is exactly the risk you don’t want from a utility. CleanMaster keeps the entire pipeline on-device, so there’s no upload to intercept, no account to breach, and no telemetry quietly profiling your library.

Tips & edge cases

Airplane mode works — a simple way to confirm nothing is sent.
No sign-up means nothing to cancel or leak.
Sensitive media belongs in the encrypted vault, also on-device.

FAQ

Does CleanMaster upload my photos or contacts? No. Every scan, compression, and match runs locally; nothing is collected or transmitted.

Do I need an account? No. There’s no account, no sign-in, and no third-party analytics SDKs.

Does it work offline? Yes. Because everything is on-device, it works with no internet connection.