I came across this tip by chance, and I share, in the hope that it interests other members of the forum.
If your app have to work with a lot of images, notably via image pickers, you will have noticed that the stored images are sometimes very heavy. They receive almost no treatment.
So instead of using the call to the image of the database, I use the url of the image stored in the database.
And I realized that the images were stored in reality on https://www.imgix.com which offers a lot of cool parameters, notably to considerably reduce the weight of the image (and suddenly the loading time of the apps) and a lot of other cool stuffs. You just have to past parameters after your URL image in Adalo.
You can test parameters here:
For example, without visible loss of quality on one of my images, the weight went from 1.5MB to 60KB …