A couple thoughts, as someone who has used f.lux for years and loves what it does:
1. It's a feature, not a product. And a simple one, conceptually. As much as I'd love to have competition in apps offering this functionality (like keyboards), "make my screen more red" isn't exactly rocket-science.
2. It's not well-designed. Their messaging mixes up two very different use-cases: matching the color of your room and aiding your sleep. That's ok - I use it for both - but there's no way to customize it. Even a super-simple option would let me communicate that I only want it on after 10:30 pm, a couple hours before I go to sleep, when I darken my room. Instead I need to deal with it automatically turning on every day at 4:30 pm, which makes something that should be simple very cumbersome (I have to manually turn it on and off every day in the winter).
1. It's a feature, not a product. And a simple one, conceptually. As much as I'd love to have competition in apps offering this functionality (like keyboards), "make my screen more red" isn't exactly rocket-science.
2. It's not well-designed. Their messaging mixes up two very different use-cases: matching the color of your room and aiding your sleep. That's ok - I use it for both - but there's no way to customize it. Even a super-simple option would let me communicate that I only want it on after 10:30 pm, a couple hours before I go to sleep, when I darken my room. Instead I need to deal with it automatically turning on every day at 4:30 pm, which makes something that should be simple very cumbersome (I have to manually turn it on and off every day in the winter).