Before attempting any of the following instructions, please make you already have the PlusMinus app installed on your iPhone.
Method 1: Via App Store
1. Open the "App Store" app on your Apple Watch.
1. Search for "PlusMinius".
2. Tap "Get" to install.
Via Apple Watch App
1. Open the "Apple Watch" App
2. Scroll down to "Available Apps".
3. Install PlusMinus app.
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