I agree with all these comments.
Mobile app is useful only if you share your inventory and the shopping list and I will go further.
Indeed, if you want to design/modify recipes reliably and easily, you should be able to share also ingredients base and equipment.
Otherwise, you must modify your equipment on your mobile each time you modify it on your PC, or it will lead to mistakes, this is not convenient. Same for the ingredients base.
Without this feature, the mobile app is not really usable for me and I cannot create/modify recipes easily out of home.