On the software and app front, the Huawei Watch Fit 4 and Fit 4 Pro are nearly indistinguishable. Both pair with a free, ad-free companion app that covers an impressive breadth of features: activity reports, exercise diary, coaching, goal setting, live tracking, route and maps support, voice feedback, music playback, and comprehensive health tools including water intake, weight, and BMI tracking. The app's reproductive health suite — covering period notifications, fertile window alerts, ovulation prediction, and cycle start date forecasting — is fully available on both models as well.
The only divergence is temperature tracking in the app, which is supported on the Fit 4 Pro but absent on the standard Fit 4. This directly mirrors the hardware difference identified in the sensors category: without a physical temperature sensor, the Fit 4 simply has no data to feed that feature. On the Pro, temperature tracking adds a continuous layer of wellness insight — most meaningfully when used alongside the reproductive health tools, where skin temperature trends can refine cycle and ovulation predictions over time.
As a software package, both watches offer exceptional depth for their category. The Fit 4 Pro holds a narrow edge solely due to temperature tracking unlocking an additional dimension of health data — but for users who have no interest in that feature, the app experience is effectively identical across both devices.