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• Show HN: I built a photography weather alert system — hi HN,<p>I'm a landscape photographer by heart and a software developer by trade. I build a web app for automating alerts for photography weather.<p>It is meant to solve the following issues I (and probably others) had: - the need to check multiple weather apps multiple times a day - keeping an eye out for some long range conditions like full moon or moon + azimuth - combining several conditions into triggers - notifications/reminders for those triggers<p>At first, I built a POC on my wordpress site. It was useful but hard to maintain, so I built a new one from scratch using C#, EF Core, Postgres, vanilla html/css/js.<p>Current functionality: - tracks locations the user saves, updates forecasts - allows to create alerts of two types: - simple conditions like high clouds > X, low clouds < Y, timing window = around sunrise - smart checks like fog or frost prediction, rain clearing, moonrise at sunset, open horizon - some spatial cloud calculations - moon table (up to 365 days ahead) for long range planning<p>There are some existing apps but I took a different approach. I didn't like the "magic scores" or "awesomeness certainty". Instead, it either triggers or it doesn't and gives you the snapshot.<p>I launched MVP several weeks ago so it is still WIP. I'd appreciate any feedback - UX, usefulness, etc.<p>PhotoSignal is freemium (1 location is free). But for HN, I'm giving a temp trial for all features and more locations.<p>Invite code: HNINVITE<p>Enter the code during registration. The code is active until July 15 and gives 14 days of access after account activation. After that, the account goes back to the free plan (1 location). Signup and email verification are required because it stores locations and sends notifications.

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• Show HN: Daylight – track sunrise / sunset times in your terminal — I love the sunlight and dread the long, dark winter evenings of Northern Europe. I often look up sunrise / sunset times and count off the days until the darkness is gone.<p>Now I've written a terminal app for this (Mac/Linux)<p>Features: a colorful summary of daylight times for your location; projected change over the coming days; handles NO_COLOR and a ---short flag if you dislike the output format.<p>The location is IP-based but you can override this if you're on a VPN. Just create a terminal alias with the --loc flag. The app supports areas in the arctic / antarctic circle too.<p>Check our the repository for a preview and instructions on how you can install it with Homebrew.<p>(There is a Windows build but it's not yet tested)

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• Show HN: Get hard to get backcountry permit — I got tired of trying to go backpacking and losing out on permits either through lottery or someone effectively bid-sniping cancellations. So, I built a real-time alert system across every state and federal booking system in the US. This covers ~700 permitted trails and locations as well as campsites.<p>It's the first real end-to-end product I've ever built myself and I gotta say, it's a lot of fun. I had to build a ton of custom infra and adapters to connect to the various, disparate booking systems in order to find cancellation.<p>Definitely pushed my capabilities.<p>Hope this helps some of you finally land a trip you've been wanting to take.<p>Edit: I've created a forecast model for openings which has been quite accurate at a 7 and 14-day timespan. Next year I should be able to make this the backbone for predictive alerts. <a href="https://permitsnag.com/permit-forecasts" rel="nofollow">https://permitsnag.com/permit-forecasts</a>

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