Stop bleeding for your iPhone storage. Turn off siri's learning from the app.
by Poster
Jun 2, 2025
37
The iPhone has a personal context log similar to the Mac's "Spotlight Knowledge Events", with the core file knowledgeC.db (and the Biome operation log stream added since iOS 16);
They are located in the system areas/private/var/mobile/Library/CoreDuet/Knowledge/and/private/var/mobile/Library/Biome/,
Ordinary users do not have the right to delete directly, but they can completely disable learning/indexing and clear history through Settings → Siri (or "Apple Intelligence & Siri") → App and other interfaces to slow down the speed of new additions.
In short, in order to promote functions such as Apple intelligence and device-side ai, Apple has made operation records in the system infrastructure in advance.
It is used to provide context for future ai functions, but the ai functions are not available at present, but this log is continuously recorded.
Will waste and consume a lot of iphone space (10 + Gb ~ more)
Can stop "bleeding" without surgery
2.1 Completely prevent iOS from continuing to write to behavior logs
Turn off system-level learning
Path: Settings → Siri (or Apple Intelligence & Siri) → Siri Suggestions
Turn off the three switches: Display in search, Display in lock screen, and Learn from this App.
Apple Support
Reddit
Unindexing App by App
Swipe down on the same page, click on each App, and turn off what appears in Search and Learn from this App.
Turn off the new global "Search" switch (iOS 18 +)
Settings → Spotlight/Siri suggestions can be disabled at once in Search.
Apple Support Community
Disable location-related recommendations (reduce log writes)
Settings → Privacy & Security → Location Services → System Services → Suggestions & Search → Close.
Apple Support
Delete existing Siri & Dictation history (doesn't delete the knowledge database, but clears the cloud copy)
Settings → Apple Intelligence & Siri → Siri History → Delete.
Apple Support
2.2 What effect can this bring?
knowledge-agent and biomeagentd are still running, but log writes have dropped significantly; Community testing shows that newly added files 24 hours after deactivating all recommendations are almost 0 KB.
Spotlight can still search local indexes such as contacts, App names, and more, instead of pushing Siri suggestions or cross-App contexts.
Unfortunately, on ios, the personal operation index file that has been generated cannot be deleted (Apple may have its time-based clearing mechanism)
But it can make the storage space of your iphone more durable. Besides, the domestic ai function is not yet available, so it is really not of great use at present.
Replies
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Anonymous10914 Jun 2, 2025Is it really useful? Just try it. There is still more than ten G of space at present
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Anonymous10497 Jun 2, 2025My iPhone has only used half of the total space, so there is no need to turn it off.
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Anonymous8449 Jun 2, 2025Where is there so much 10 + GB? Just open your mouth and come Moreover, this thing is currently used in non-generated AI scenarios, such as opening spotlight at different time periods to recommend different apps, spotlight fuzzy search and sorting, and automatically recommending specific audio of different apps when connecting peripherals such as headphones
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Anonymous3722 Jun 2, 2025I have turned off the Siri listening function a long time ago. Will I keep learning to increase the space? To be on the safe side, I still close the learning of commonly used apps
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Anonymous1709 Jun 2, 2025The actual test was useless. I manually turned off the "learning from this app" of all ios apps, and there was no change in the storage space.
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Anonymous1903 Jun 2, 2025I'll come in and see everyone's test results before deciding my next move
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Anonymous769 Jun 2, 2025@ Anonymous1709 Isn't this the expected effect you said? No change is no increase, which is the effect mentioned in the text "What effect does this bring? knowledge-agent and biomeagentd are still running, but log writes have dropped significantly; community testing shows almost 0 KB of new files 24 hours after deactivating all recommendations. Unfortunately, on ios, the personal operation index file that has been generated cannot be deleted (Apple may have its time-based clearing mechanism) "
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Anonymous4051 Jun 2, 2025AI-generated? I can't find many of the settings mentioned in the post in my phone
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Anonymous3722 Jun 3, 2025@ Anonymous1709 may not be added, but the existing ones should not be automatically deleted
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Anonymous10890 Jun 3, 2025Help OP fill a directory, which is also Siri's. The more frequently it is used, the greater it is. We are currently studying the range that can be cleared /private/var/mobile/Library/Trial/
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Anonymous10890 Jun 3, 2025The cache and index files of Spotlight index and Learn for Apss are cleaned up to see the face. There are almost no usefulness in daily life. It is recommended to close them immediately.
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Anonymous10890 Jun 3, 2025@ Anonymous1709 If you want to be useful in storage, the device has to be banned or jailbroken at the beginning to dry files
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Anonymous10890 Jun 3, 2025@ Anonymous8449 opened his mouth without crossing the jail check directory. I didn't do the directory before 7GB
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Anonymous10890 Jun 3, 2025I can't even find a completely disable switch to make up for Spotlight's useless function, so I have to go directly to Launch Daemon to do it
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Anonymous8449 Jun 3, 2025@ Anonymous10890 It's funny that iOS18 doesn't have old models that support checkm8 that can be upgraded. Why do you put this jailbreak to check the directory? The old system may be flawed + jailbreak plug-in explosive changes = your personal space occupied badcase
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Anonymous10890 Jun 3, 2025@ Anonymous8449 It's funny, iPad7 can be jailbreaked and swallowed by you; Yes, Siri and apps learning are features that are only available at the age of 18. There are still defects in the old system and jailbreak plug-ins to change these directories. Just pretend to understand if you don't know, let's take it off
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Anonymous8449 Jun 3, 2025@ Anonymous10890 Yes, you can use your iPad7 to reproduce this problem on iOS18.5, just give a detailed proof Don't mess with these personal attacks, don't know how to pretend to understand, you know, you can prove it
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Anonymous10890 Jun 3, 2025@ Anonymous8449 I said 7Gb above, did you not carefully examine the question or something
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Anonymous8449 Jun 3, 2025@ Anonymous10890 This is not a detailed proof you need to prove that what is said above is on an iPad7 iOS18.5 that has been used Otherwise, I can just say how big he is Just like the macOS post next door, macOS is easier to view, so you will find that most people don't have this problem at all, and it is an independent case in itself
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Anonymous10890 Jun 3, 2025#18 The two SB bugs of Spotlight indexing and learning and iBooks have existed for several years. If you were to say that the old system has not been fixed, and there is no movement across several versions. The fruit is either not or intentional