§ Guide

IOS Knowledge And Biome The Device Activity Record

Ref · E-D · 2026 · §LIBClass · ConfidentialJuris · England & WalesStatus · Active

Guide · 18 pages · 25 min read · Published 2026-09-02

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Published by Computer Forensics Lab on 2026-09-02. Original material of the practice, free to read, cite and download. The authority behind this subject is Civil Procedure Rules Part 35, experts and assessors, which you should read alongside this guide. See every guide's author and source.

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IOSKNOWLEDGE & BIOME · A GUIDE FOR UK LAWYERS

iOS Knowledge and Biome: The Device

Activity Record

The Phone's Own Diary of What Was Done, and Why It Must Be Read by an

11 Questions to ask · Suggested wording

12 Checklist and red flags · When to involve a digital forensic expert

13 Frequently asked questions

14 Glossary · References · Disclaimer · How a specialist laboratory can assist

Executive summary

The headline point: an iPhone keeps a fine-grained diary of its own use in internal databases such as

Knowledge C and Biome, recording which apps were used and when, screen and lock state, notifications and

connections, a powerful source for reconstructing user activity, but cryptic, specialist to interpret, and subject

to ageing out.

§ 02 · FIRST PRINCIPLES

The problem in plain English: the phone keeps a diary

§ 12 · QUICK CONTROL

Checklist and red flags · When to involve a digital forensic

Why do these need an expert to interpret?

If there are no activity records for a period, does that prove nothing happened?

Working with Computer Forensics Lab

Speak to a forensic examiner, not a salesperson.

§ Common questions

Frequently asked questions

What are Knowledge C and Biome?
Internal iOS databases that record device activity (
What can these databases show?
Whether the phone was in use and what was being done, at a fine time resolution (
Why do these need an expert to interpret?
Because they are undocumented and cryptic (
How reliable is this evidence?
Reliable when interpreted by expert is e and corroborated (
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