SIGNAL.

None. (Signal does not collect any data from your phone).

The only personal data Signal

stores is your phone number, and

makes no attempt to link that to

your identity.

TELEGRAM.

Contacts info - to enable you chat with your other contacts.

Contacts and user ID.

WhatsApp.

Device ID

User ID

Advertising Data

Purchase History

Coarse Location

Phone Number

Email Address

Contacts

Product Interaction

Crash Data

Performance Data

Other Diagnostic Data

Payment Info

Customer Support

Product Interaction

Other User Content 

WhatsApp also collects other secret information about you and your phone and the parent company Facebook will now be sharing your WhatsApp information as written in this article

FACEBOOK.

Purchase History

Advertising Data

Other Financial Info

Other Usage Data

Crash Data

Precise Location

Performance Data

Coarse Location

Physical Address

Other Diagnostic Data

Email Address

Other Data Types

Browsing History

Name

Phone Number

Health

Other User Contact Info Fitness

Contacts

Payment Info

Photos or Videos

Photos or Videos

Gameplay Content

Audio Data

Other User Content

Gameplay Content

Search History

Customer Support

Other User Content

Browsing History

User ID

Search History

Sensitive Info

Device ID

Product Interaction

iMessage

Email address

Device D

Phone number Search history

Signal

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