u/Creepy-Crow4680

I’ve had this free sleep calculator site around for a while, but I’ve been trying to make it more useful instead of just letting it sit there. It’s called NightOwl SleepCalc and the main idea is pretty simple: you enter when you need to wake up, or when you’re going to bed, and it gives you sleep timing options based on sleep cycles, how long it might take to fall asleep, naps, caffeine timing, jet lag, sleep debt, etc. I know there are a bunch of sleep calculators already, so I’m not pretending this is some brand new revolutionary thing. I mostly built it because a lot of calculators feel too basic and give you one “perfect” bedtime, when real sleep is usually messier than that. I also just added a night shift / shift worker calculator inside the guide for night shift workers, where you can enter your shift times and get a rough plan for main sleep, anchor sleep, pre-shift nap, caffeine cutoff, and light guidance. It’s completely free, no account needed, and I’m mainly looking for feedback on whether the calculators and guide pages feel useful or too overbuilt. Here’s the app if anyone wants to roast it: https://nightowlsleepcalc.com

I’m working on a small validation tool because I kept running into the same problem with SaaS ideas: I’d get excited, start building, then realize later the problem wasn’t painful enough or there wasn’t much real demand.

The first version was simple: scan Reddit for repeated complaints in a niche and show whether people are actually complaining about the same thing. Not just one random thread, but patterns across posts/comments.

Now I’m adding a second mode I’m calling a reverse success scan. Instead of only looking for complaints, it looks for small apps people built that got users with little or no marketing. The idea is to figure out what traction pattern is underneath it, then suggest a differentiated angle instead of just copying the original product.

The report is supposed to answer a few things before someone starts building: is there real pain, is there evidence, what could you build, how complex would the MVP be, and how could you make it different from similar tools.

Still early, but I’m trying to keep it focused on “should I build this?” instead of just generating random SaaS ideas.

Would love feedback on the positioning. Does “validate from complaints + reverse success scans” make sense, or is that trying to do too much?

Here’s the page if anyone wants to see the current version: https://startkitz.com/validate