Hemoglobin & Hematocrit Home Test Device

Does anyone use a home test kit for checking your hemoglobin and Hematocrit? Can you recommend one that is accurate and reliable? I want to be able to test myself to know when I need to donate blood rather than have to go to a lab and have it done.

Thanks

^already queried for hematocrit.

Pick and choose which one applies best to you. Basic CBC & CMP is only like $54 if that’s all you need.