Weather@Home 4+

The app provides access to your thermometer if you’re within Bluetooth range of the base. It always tries to download the history and frequently crashes before it completes. This happens even when standing next to the base. When you do receive the history, the display options are very limited; either one day, or everything.

Oregon Scientific is not maintaining the app and it does NOT work with the iPad.

Don’t buy this thermometer is you’re relying on the app to be useful.

After reading the posted reviews, I didn't expect the Bluetooth pairing to work. At first, it didn't want to pair but after reading the User Manual I saw I had to hold the Up Arrow button on the main unit after making the request. Within 2-3 seconds it paired and soon I could see the readings from the two remote units I've had for over ten years now. So really happy this device has backward compatibility.
I've only played with the Settings a short time but so far no crashes.
I didn't rate it 5 stars as some of the options are unintuitive and the Min/Max values are both higher than the current temperature. But I want to see how things settle down after a few days use.

The weather station and outdoor sensor have both worked extremely well for years. The app occasionally loses contact with the station but putting the station into pairing mode always restores it and all relevant information is displayed in the app and the time is synced to the station. I’ve used this set up for over 6 years now and have been very pleased.