Knuff

Knuff helps families, close friends, partners, and neighbours stay connected without requiring constant calls or long messages. Members create private Bubbles and use a one-tap check-in to show that they are okay. A visual Bubble map shows how recent each person’s check-in is, and other members can be notified when someone has been inactive longer than usual. Knuff also supports private chat, reactions, photos, and videos, making it a lightweight complement to traditional messaging apps. It is available for iPhone, iPad, and Android, with core functionality free and optional extras offered as one-time purchases rather than subscriptions. Knuff is developed in Munich, and its website states that user data is hosted entirely in Germany without AWS, Google, or other US cloud providers.