Thank you, Javier. 

I wondered if there are any other options because I use 
Preferences.clearAll() in some cases, as well as I wasn't sure about app 
updates etc. But I guess if there are no other ways or this is the best 
one, will do it. 

On Thursday, May 20, 2021 at 11:55:26 AM UTC-4 [email protected] wrote:

> You can use Preferences to write a small boolean value that is set to true 
> after the first time the app is used
>
> Updating an already installed app wont reset the flag as that re uses the 
> app data folder
>
>
>
> On Thu, 20 May 2021, 16:52 Hannah R, <[email protected]> wrote:
>
>> Hi,
>>
>> How can I find out when the app was launched the first time after 
>> installation? 
>> Thank you a lot. 
>>
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