Suunto ZH, developed by Amer Sports Digital Services Oy, is a free lifestyle app designed for iPhone users. The app offers a wide range of features to help users maintain a healthy and active lifestyle. With Suunto ZH, users can view key training, activity, and sleep summaries, track their daily steps, and monitor calorie consumption. The app also allows users to create their own custom workout modes and customize the content displayed on their fitness watches during training and adventures.

One of the standout features of Suunto ZH is the specific activity heatmap, which displays the most popular routes around the world. Whether exploring the surrounding city or heading to a new destination, users can discover and plan their preferred routes. For Suunto 3 Fitness users, the app enables the "connected" GPS feature from their phones, allowing them to view their speed, distance, and itinerary on a map.

Suunto ZH also offers integration with popular fitness services like Strava, Endomondo, TrainingPeaks, and Relive, allowing users to share their activity data and access exclusive partner benefits. Overall, Suunto ZH is a comprehensive fitness app that provides users with a wealth of features to support their active lifestyle.