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TinyCheck
TinyCheck allows you to easily capture network communications from a smartphone or any device which can be associated to a Wi-Fi access point in order to quickly analyze them. This can be used to check if any suspect or malicious communication is outgoing from a smartphone, by using heuristics or specific Indicators of Compromise (IoCs). In order to make it working, you need a computer with a Debian-like operating system and two Wi-Fi interfaces. The best choice is to use a Raspberry Pi (2+) a W
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Re: capturing data Doing this directly on the device (e.g. iPhone or computer) is the easiest/most reliable way. Like others have mentioned, the battery running down quickly indicates that something is likely constantly running on the phone. There are tools like TinyCheck which can detect traffic from known stalkerware, but the most reliable way is to not use the device at all- power off and leave at home (known location). I'm not familiar with what capabilities Apple ID accounts have, but gaining control and securing Apple devices should start with the account.