Added README and images

Author: alecdotdev

README.md

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+# QuickCalc - Simple calculator app for WearOS
+
+I got a Pixel Watch 2 and was surprised to find that there was no calculator app. So I made a quick and simple one that does the job. I know you could just use Google Assistant, but I wanted something that I could use without having to speak to my watch in public lol.
+
+I designed it specifically for the Pixel Watch 2 (which is round), so it might not look great on other watches.
+
+I based it on the stock Pixel calculator, and styled it to match my Material You colour scheme. Feel free to fork and change the colours to match your own theme.
+
+## Features
+
+- Horiztonal scrollable display
+- Backspace button
+- Stock appearance
+
+## Screenshots
+
+![main interface](readme/Screenshot_20231111_123128.png)
+![scrolled left with long expression](readme/image.png)
+![scrolled right with long expression](readme/image-1.png)
+
+## Installation
+
+1. Download the latest release from the [releases page](releases)
+2. Activate Developer Mode on your watch (click on the build number 7 times)
+3. Enable Wireless Debugging in Developer Options
+4. Use ADB on your computer to Pair and Connect to your watch via Wireless Debugging. Official instructions on that [here](https://developer.android.com/training/wearables/get-started/debugging)
+5. Once connected, type `adb install <path to QuickCalc.apk>`
+
+## Known issues
+
+- Most cases are covered but there are probably some edge cases that I haven't thought of. ex.: it will let you type operators after a `-` which shouldn't be allowed.
+- It is a tiny bit slow when typing numbers, but I think that's just because of the way I'm handling the input. If I find a better way to do it I'll update the app.
+
+## To do
+
+- [ ] put on Google Play Store