Hi!
I just published Ilma, a small native iOS app for nearby RuuviTags: Ilma App - App Store
& Ilma - RuuviTag App for iOS
It is built on restraint, and privacy first. Temperature is the hero. You also get the name you chose, humidity, dew point, pressure, and battery. When the tag is out of range, it keeps the last reading it heard and shows that on Home Screen, Lock Screen widgets. Apple Watch shows the same claimed sensors when you are nearby.
No history, no alerts, no background scan, no Gateway, no account. Names and last snapshot can stay in the user’s iCloud. No tracking, no third-party code. Free, optional Tip Jar never required.
To summarise it: “Built on restraint, boring on purpose. Deeply iPhone, small and focused”.
Ruuvi’s official app covers the rest for power users.