No matter how much I dislike chest straps, the Garmin HRM 200 and Polar H10 have my grudging respect

If you're not hypersensitive to tight devices, a chest strap is unquestionably better than your current smartwatch.

source https://www.androidcentral.com/wearables/garmin-hrm-200-helped-me-realize-i-was-too-harsh-on-hrm-chest-straps