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Is Who You Know Safe?

Who You Know privacy label · by SilverLogic, LLC · checked November 2026

  • Recently updated
App Privacy label Developer-reported · checked November 1, 2026
Used to track you
0types

None declared

Linked to you
4types
Not linked to you
0types

None declared

Short answer

Mostly a question of trust: Who You Know collects data linked to you but declares no tracking. The sensitive items are contacts and user content. In total the label lists 4 data types; 33% of contacts backup apps we checked declare tracking.

At a glance

Who You Know privacy in one look

Data exposure on the label
Linked to you
  1. 1
  2. 2
  3. 3
  4. 4

Built only from the developer's App Store label. It describes disclosure, not tested behaviour.

Verdict from the label
Linked to you, no tracking

Who You Know collects 4 data types tied to your identity but declares no tracking.

Try it

Did Who You Know ask for something?

Pick the permission prompt you saw. We compare it with what Who You Know's developer declared.

It asked me for access to…
Tap a prompt to compare it with the label.
Not on the label

Location is not on Who You Know's label. That can be fine: data used only on your iPhone does not have to be declared. If the data would need to leave the phone for the feature to work, ask why it is missing.

Matches the label

Who You Know lists User Content on its label, linked to you. Choose Limited Access and pick only the photos you want to share.

Matches the label

Who You Know lists Contacts on its label, linked to you. Limited Access shares selected contacts instead of your whole address book.

Not declared on the label

Who You Know declares no tracking, so a tracking prompt would contradict its label. Decline it, and consider reporting the mismatch to Apple.

Not on the label

Health & Fitness is not on Who You Know's label. That can be fine: data used only on your iPhone does not have to be declared. If the data would need to leave the phone for the feature to work, ask why it is missing.

A permission is what the app can reach on your iPhone; the label is what the developer says leaves it. They answer different questions.

Line by line

What Who You Know collects, explained

Data typeWhat it coversWhere to limit it
ContactsSensitiveLinked to you The people in your address book or social graph. Settings › Privacy & Security › Contacts: choose Limited Access to share only selected people, or None.
User ContentSensitiveLinked to you Messages, photos, videos, audio recordings, documents and support chats you create or upload. Settings › Privacy & Security › Photos: choose Limited Access or None; review Microphone and Files access too.
Contact InfoLinked to you Your name, email address, phone number or postal address. Use Sign in with Apple with Hide My Email where offered, and check the app's account and marketing preferences.
IdentifiersLinked to you An account ID, screen name, customer number or a device-level ID such as the advertising identifier. Settings › Privacy & Security › Tracking: turn off Allow Apps to Request to Track, or tap Ask App Not to Track when prompted.
Reading the label

What Who You Know's label means for you

Who You Know's label has 4 types under “Data Linked to You”. A data type can appear in more than one section when it is used for different purposes — for example, identifiers used for both analytics and advertising.

Who You Know declares no tracking, which means the developer says it does not combine your data with other companies' data for advertising or sell it to data brokers. The data linked to you — contacts, user content, contact info and identifiers — is still tied to your identity, typically through an account, and is covered by the developer's privacy policy and retention rules.

The items that deserve the most attention are contacts and user content. Uploading contacts shares other people's details, not just yours.

Contacts backup apps upload your whole address book — other people's names, numbers and addresses, not just yours. Check where the backup is stored, whether it is encrypted, and how to delete it from the server.

Among the 126 contacts backup apps in our snapshot with a label, 33% declare tracking, 48% collect data linked to you and 33% say they collect nothing. Who You Know lists 4 data types, more than the average of 2.2 for this group.

Productivity apps tend to collect the work you do in them — documents, notes and files — so User Content is common. The question is whether it syncs to the developer's servers and how it is protected there.

On your iPhone

Settings to check for Who You Know

  1. 1

    Tracking

    Settings › Privacy & Security › Tracking. If “Allow Apps to Request to Track” is off, apps cannot ask, and they are told to treat you as having declined. You can also turn it off for this app alone.

  2. 2

    Photos

    Settings › Privacy & Security › Photos. Limited Access lets you pick exactly which pictures the app can see; Add Photos Only lets it save without reading your library.

  3. 3

    Contacts

    Settings › Privacy & Security › Contacts. Limited Access shares only the people you select instead of your whole address book.

  4. 4

    Sign-in

    When creating an account, Sign in with Apple can give the app a relay address from Hide My Email instead of your real one.

  5. 5

    Lock the app

    On iOS 18 and later, touch and hold the icon and choose Require Face ID. Anyone who picks up your unlocked phone then needs your face, fingerprint or passcode to open it.

  6. 6

    Notifications

    Settings › Notifications › Who You Know › Show Previews: When Unlocked keeps message and account details off the Lock Screen.

Cross-app tracking

Does Who You Know track you?

No tracking declared

There is no “Data Used to Track You” section on Who You Know's label.

Does Who You Know track you? Full answer and how to stop it →

iOS 18 and later

Lock Who You Know behind Face ID

  1. Find Who You Know on your Home Screen or in App Library.
  2. Touch and hold the icon until the quick-actions menu opens.
  3. Tap Require Face ID (or Require Touch ID / Require Passcode, depending on your iPhone).
  4. Tap Require Face ID again to confirm. Who You Know now asks for authentication every time it opens.

The lock is an iPhone feature, so it works whether or not Who You Know has a passcode of its own. It does not change what the app sends to its developer.

From the App Store record

About Who You Know

DeveloperSilverLogic, LLC
App Store categoryProductivity
Latest version1.1.1, released October 2026
First releasedOctober 2026
RequiresiOS 17.0 or later
Size24 MB
Age rating4+
Languages1 (EN)
Bundle IDio.tsl.mingle

The current version shipped in October 2026, so the app is actively maintained and its label is likely current. Labels are updated by developers when practices change.

Read with care

What the label cannot tell you

  • A label is self-reported. Apple publishes the developer's answers and can reject apps that misrepresent them, but it does not independently verify what Who You Know sends.
  • It does not say where data is stored, how long it is kept, whether it is encrypted, or which companies receive it. The privacy policy covers those points.
  • Optional data counts: if a feature lets you add something (a profile photo, a phone number), the type is listed even if you never use the feature.
  • Data handled only on your iPhone is not 'collected', so a no-collection label is compatible with an app that reads your files locally.
  • Third-party sign-in, payment processors and SDKs are supposed to be included, but a label can lag behind a new version.

The question to ask Who You Know's developer: How do I delete my contacts from their server later?

How it compares

Who You Know vs similar contacts backup apps

Data types listed on each App Store privacy label
Tracks youLinked to youNot linkedCollects nothing

Fewer types is not automatically safer: a cloud backup app has to collect your files to work. Compare like with like.

Checking another app?

Look up any of our apps in seconds, or put two labels side by side.

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All contacts backup apps → Who tracks you? A–Z → Apps that collect contacts → Privacy label decoder →

Do it now

Your Who You Know privacy checklist

Tick what you have done
Tick each step as you do it on your iPhone.

Done. You have applied every control the label points to.

Quick quiz

True or false?

  1. Q1Who You Know's privacy label says it uses data to track you.
    Right.
    Not quite.

    False: there is no Data Used to Track You section on Who You Know's label.

  2. Q2Apple tests every app to confirm its privacy label is accurate.
    Right.
    Not quite.

    Labels are self-reported by developers. Apple can reject or remove apps that misrepresent practices, but it does not audit each label.

  3. Q3Who You Know collects Contacts.
    Right.
    Not quite.

    True: Contacts appears on its label.

  4. Q4Data “Not Linked to You” is never sent off your iPhone.
    Right.
    Not quite.

    It is collected and sent; the developer says it is de-identified rather than tied to your account or device.

  5. Q5Tapping “Ask App Not to Track” can stop an app from working.
    Right.
    Not quite.

    Apple's rules require apps to work the same whether or not you allow tracking.

Questions people ask

Who You Know privacy FAQ

Is Who You Know safe to use?
Based on its App Store privacy label, who You Know collects 4 data types tied to your identity but declares no tracking. Whether that is acceptable depends on what you will store in it. The label is developer-reported, not an independent security test.
Does Who You Know track you?
No. Who You Know's label has no Data Used to Track You section.
What data does Who You Know collect?
Contacts, user content, contact info and identifiers. Of these, contacts, user content, contact info and identifiers are linked to your identity.
Who makes Who You Know?
SilverLogic, LLC, according to the App Store. It was first released in October 2026 and the current version is 1.1.1.
Can I lock Who You Know with Face ID?
On iOS 18 or later, touch and hold Who You Know's icon and choose Require Face ID (or Touch ID / Passcode). This is an iPhone feature and works for most downloaded apps, whether or not the app has its own lock. If you don't see the option, update iOS.
How does Who You Know compare with other contacts backup apps?
Across 126 contacts backup apps with labels in our snapshot, 33% declare tracking and 33% say they collect no data. Who You Know lists 4 data types against an average of 2.2.
How do I delete my contacts from their server later?
The privacy label cannot answer that. Look for it in Who You Know's privacy policy or support pages, linked from the App Store listing. Check where the backup is stored, whether it is encrypted, and how to delete it from the server.
How do I delete my data from Who You Know?
Apps that let you create an account must also let you start account deletion from inside the app (an App Store rule since June 2022). Deleting the app from your iPhone alone does not delete data already sent to the developer.
Facts on this page come from Who You Know on the App Store, as reported by the developer. Checked 2026-11-01. How we collect data · Report a correction