If you uninstall Snapchat, you will lose your streaks.
Your streaks are stored on Snapchat’s servers, so if you delete the app, they will be deleted as well.
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How do I delete my Snapchat account on IOS?
When Snapchat is uninstalled Do I lose everything?
No. The snaps that you sent will be deleted and they won’t be recoverable but the snaps that you received will still be in your phone.
If you uninstalled the app on an Android device, go to Settings > Apps > Snapchat and tap “Uninstall”.
If you uninstalled the app on an iOS device, go to Settings > General > Storage & iCloud Usage > Manage Storage > Snapchat and then tap Delete App.
Source: https://helpfixthat.com/if-i-uninstall-snapchat-will-i-lose-everything/
What happens when u delete Snapchat?
SNAPCHAT SUPPORT
Thank you for contacting Snapchat Support!
We’re sorry to hear that you’re having difficulties using our app. When you delete the Snapchat app from your device, it removes all of your data associated with the app including your account, messages, and other content.
However, if you reinstall the app within 30 days of deleting it, you can recover your account and data by logging in with your username and password.
If you have any further questions or concerns, please do not hesitate to let us know.
What happens if I uninstall and reinstall Snapchat?
If you uninstall and reinstall Snapchat, all of your account data will be erased. This includes your friend list, Snap history, trophies, and settings.
If you’d like to keep your data, we recommend backing it up before uninstalling the app.
How do you know if someone uninstalled Snapchat?
If you’re wondering whether someone has uninstalled Snapchat, there are a few things you can look for.
First, check to see if that person has stopped appearing in your Snapchat Stories. If they used to regularly contribute snaps to your Story but have suddenly stopped, it’s possible they’ve uninstalled the app.
Secondly, take a look at your chat history with that person. If all of their messages have disappeared, it’s likely they’ve uninstalled Snapchat.
Finally, try sending that person a snap. If it says their username is unavailable, or if the snap fails to send altogether, it’s likely they no longer have the app installed on their device.
