Unknown 'sys-ext-tasks$' folder in Reminders on iPhone

My phone is iPhone 13 on iOS 26.3.1. I suddenly find an unknown folder in my reminders app:

‘sys-ext-tasks$’

What is this and how it came up on my phone by itself? I hope it is not a virus or hack effort.

Thank you.

iPhone 13, iOS 26

Posted on Mar 13, 2026 8:44 AM

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Question marked as Top-ranking reply

Posted on Mar 14, 2026 10:10 AM

I did a google search and found this, so I can't confirm it, but this what I found:


"The sys-ext-tasks$ entry in the Reminders app on iPhone is a system-generated identifier that appears when there's a synchronization issue, typically linked to a Yahoo Mail account. 

 It is not a user-created task but rather a technical artifact from the integration between Yahoo Mail and Apple's Reminders."


And since I use Yahoo Mail, I checked in my Reminders and the same reference is there. It's not nefarious, so I'm not going to worry about it.

7 replies
Question marked as Top-ranking reply

Mar 14, 2026 10:10 AM in response to unfairapple

I did a google search and found this, so I can't confirm it, but this what I found:


"The sys-ext-tasks$ entry in the Reminders app on iPhone is a system-generated identifier that appears when there's a synchronization issue, typically linked to a Yahoo Mail account. 

 It is not a user-created task but rather a technical artifact from the integration between Yahoo Mail and Apple's Reminders."


And since I use Yahoo Mail, I checked in my Reminders and the same reference is there. It's not nefarious, so I'm not going to worry about it.

Mar 14, 2026 12:13 AM in response to unfairapple

unfairapple wrote:

I hope it is not a virus or hack effort.

Keep the iPhone updated to the latest iOS always and never Jailbreak. That's it.


iOS / iPadOS devices cannot be hacked or infected with Viruses / Malware / Spyware *** unless you have intentionally downloaded spurious software or unauthorized apps directly from the internet and installed them on your device, and/or have Jailbroken


It (Hacking) also depends on how careful you are in sharing sensitive and valuable information pertaining to your iPhone such as Passcode, Password, etc with your friends and family members.


Be judicious when sharing the device's sensitive and valuable information with friends and family members.



**The primary reason for this is Sandboxing. All third-party apps are “sandboxed”, so they are restricted from accessing files stored by other apps or from making changes to the device. Sandboxing is designed to prevent apps from gathering or modifying information stored by other apps.


Security of runtime process in iOS and iPadOS - Apple Support



The sandbox on an iPhone is a security feature that creates a restricted environment for each app to run in isolation from other apps and the operating system. It is a core component of iOS's security architecture and plays a crucial role in making iPhones more secure.



If you doubt the authenticity of the information provided earlier, you have two alternatives:

  1. Report the hacking incident to local law enforcement authorities and actively pursue the case.
  2. Accept the credibility of the information; it is impervious to hacking. Just as some individuals hold unconventional beliefs, such as a flat Earth or moon landing denial, one has the freedom to believe in anything. The choice ultimately rests with you in this open and free world.



Mar 14, 2026 12:14 AM in response to unfairapple

To improve my understanding of the phenomenon, it would be highly beneficial if you could share a full screenshot (Do not crop it). Visual representations carry a greater impact than written descriptions.


Please remember that this is a public forum, so when attaching a screenshot, please avoid including any personal credentials such as IP addresses, card details, email IDs, Apple IDs, IMEI numbers, serial numbers, phone numbers, order IDs, or any identifiable location information if you are sharing a map.



With the limited information that you have provided, It is hard to even guess the problems faced by you. 


You may get faster and better responses to your query by --> Writing an effective Apple Support Commun… - Apple ...



Please re-post with detail so that someone else can help.


Unknown 'sys-ext-tasks$' folder in Reminders on iPhone

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