How can an app remember my information after uninstallation? - Android Q&A, Help & Troubleshooting

Hello,
I installed a French application called "onoff".
I used it and uninstalled it from my phone.
Yesterday, I reinstalled it and it offered me the option to log in with the email address I used before uninstalling it or to create a new one.
How can it remember the email address I used before uninstalling it?
Since then, I have uninstalled and reinstalled the application several times, and it still suggests the email address.
Thank you.

Use SD Maid and get rid of the corpse.
SD Maid - System Cleaning Tool - Apps on Google Play
A maid for your Android, to keep it clean & tidy.
play.google.com

Thank you very much.
I uninstalled the OnOff application, ran all the tests with SD Maid.
I reinstalled the application and it still suggests my email address.

The app may store your device id on the server.

And what can i do to block that?

parisien99 said:
And what can i do to block that?
Click to expand...
Click to collapse
If your device is rooted you can spoof the id.

parisien99 said:
And what can i do to block that?
Click to expand...
Click to collapse
Onoff - Apps on Google Play
Here's more information the developer has provided about the kinds of data this app may collect and share, and security practices the app may follow. Data practices may vary based on your app version, use, region, and age. Learn more
play.google.com
You can request that data be deleted​The developer provides a way for you to request that your data be deleted

parisien99 said:
Hello,
I installed a French application called "onoff".
I used it and uninstalled it from my phone.
Yesterday, I reinstalled it and it offered me the option to log in with the email address I used before uninstalling it or to create a new one.
How can it remember the email address I used before uninstalling it?
Since then, I have uninstalled and reinstalled the application several times, and it still suggests the email address.
Thank you.
Click to expand...
Click to collapse
Hello and good morning, @parisien99
Prior to your next posting please read the guidances that are stuck on top of every forum like
[ATTN] : Read before posting - Any questions posted here will be MOVED or CLOSED
Please read the below before posting. Any questions not development related will be moved or closed. Forum Searching | Posting | The Basics: (Make sure you've read them before starting a new thread) Forum Rules Forum Search Google Forum...
forum.xda-developers.com
and the others. I've moved your thread to Android Q&A.
Thanks for your cooperation!
Regards
Oswald Boelcke
Senior Moderator

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-----------------------
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I do NOT reply to support queries over PM. Please keep support queries to the Q&A section, so that others may benefit
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Please review the XDA Forum Rules with special emphasis on rule no. 5 and always post in an existing thread if a topic already exists, before creating a new thread. Thanks for your cooperation.
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