If you are investing for Bitcoin for long term, you don't have to check the price daily or weekly just save your seed phrase in a good secure place and delete the app from your phone. And you can check the price just once a month.
Or set alarm to receive the price of bitcoin whenever there is fall and rising. And when the price down then buy more to fill the wallet.
I think it depends on each person who will do the investment method or strategy that they will do because deleting the application is an easy thing but there must be some considerations to do so.
If you do it with a method where you buy a large amount of bitcoin and forget about it for some time without wanting to see your assets then you can delete because you have saved the seed phrase and will not buy for a long time considering you have bought a large amount before.
However, if your strategy is DCA then I think deleting the app is a bit of a hassle especially since we make purchases regularly (not just at one time) so it is a hassle if you want to buy because you have to reinstall and delete it after you buy.