InfiniTime is described as 'Open source firmware for the PineTime smartwatch. It is written in modern C++ and based on FreeRTOS' and is an app. There are more than 10 alternatives to InfiniTime for a variety of platforms, including Linux, iPhone, Android, iPad and Web-based apps. The best InfiniTime alternative is Fitbit, which is free. Other great apps like InfiniTime are AsteroidOS, watchOS, Wear OS and Amazfish.
Say hello to one of the world’s leading apps for health and fitness. Use the Fitbit app on its own to track basic stats and stay motivated on your journey. Or, get a Fitbit tracker or smartwatch to see how your activity, workouts, sleep, nutrition and stress all fit together.
AsteroidOS is the open-source operating system for smartwatches with an active development community and growing list of supported watches.
watchOS helps you better understand your daily health status using your overnight vitals and shows you how workouts impact your body over time.
Wear OS is a version of Google's Android operating system designed for smartwatches and other wearables. By pairing with mobile phones running Android version 4.4 or newer, or iOS version 9.
Participate in walking challenges to plant free mangrove trees, which store four times more carbon than rainforests. Track your steps with a phone or fitness device and help reach the target of planting 5 million trees in Madagascar for environmental conservation.
This OS has more features and apps, but is a trade-off because it isn't as fast and doesn't have as much of a clean UI.
InfiniLink allows you to interact with your PineTime smartwatch running InfiniTime (and perhaps other watches/OSes, pending testing).
Espruino is a JavaScript interpreter for microcontrollers. It is designed for devices with as little as 128kB Flash and 8kB RAM.
This app integrates the Casio G-shock square digital Bluetooth watches (B5600, B5000 series), with Google services such as Google Calendar events and Google Alarm Clock. It also works as a remote control for your phone. It is not meant to replace the official Casio app.
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It doesn't work with the PineTime, is proprietary and only runs on devices that are insanely expensive that don't get new features unless you buy a new one. None of them are moddable.