I've been a fan of Woo since version 1.0. It was exiting when Woo announced support for real time jump display on smart watches. Unfortunately the official Woo app on watches (I tried both Android and Apple watches) had some issues (especially on Android) that made it hard to use at times. That is why I decided to write my own app. Here is the result :
https://play.google.com/store/apps/deta ... .wooscreen
For now Woo Screen app works only on Android phones, but I'm working on a version for Android watches as well (Wear OS to be exact) which should be finished soon. You can use fairly old cheap phones - theoretically minimum Android OS version requirement is 4.3. I myself run it on Nexus 4 that I bought specifically for this purpose for $10 . One advantage of the phone over the watch is that it can display a lot more information. Below are some screenshots of the app and short demo video.
The App is not free (sorry all ) - it took over 3 months of work to create it, way longer than I initially expected. However at $2.49USD it is not going to break your bank either . Your other expenses might include a cheap phone, waterproof bag, armband or DYI board mount - all together should be under $50 total. For snow season I use phone without waterproofing, just in an armband.
Feel free to send me your suggestions and feedback - the app is still under active development and I can fix most of the problems fairly quickly.
Thanks all!