Erfüllt zwar nicht ganz das Ziel deiner Frage, aber: Pflanzliches Mehrkomponenten-Proteinpulver. Schmeckt nicht, aber ist erträglich und effizient.

Volksshake kann ich empfehlen.

It can scale the recipe to 0,25x, 0,5x and up to 10x.

I also enjoy the import feature via browser share sheet. Works well for most recipe sites and helps to permanently safe your favorite recipes in one place.

Cryptomator (Encryption for cloud services integrated into Files app)

Bring! (Shared shopping list)

Calendar 366 (Alternative calendar with monthly view)

Crouton (Shared recipe book)

You’ll need an exception handler for all those dropping panties.