If you're looking for an alternative to Arccos, Stats Perform could be a good choice. Although it's geared more for the sports industry to offer rich data and insights, it uses AI models to generate insights and performance analysis. That could be useful for golfers who want more data to inform their game, but it'll likely take more work to set up and interpret the data compared to Arccos.
Another possibility is WHOOP. Although it's geared more for general health and fitness tracking, WHOOP offers a powerful wearable device that tracks a range of biometric data points, including heart rate and sleep quality. It offers personalized recommendations to help you improve your daily routine and recovery, which could be useful for golfers who want to use data to improve their performance.