Bassfinity for iOS – AI guide built on solunar data, weather, and bathymetry

Bassfinity for iOS launched on the App Store today, featuring an AI Fishing Guide, Intelligence Map, SpotLens, TackleLens, BassLens, and SolunarBass, built on solunar data, weather, and bathymetry. The app originated from a public Python project in September 2024 and was refined through extensive on-water testing from February to May 2025.

Most "we built an app" announcements mean the website in a wrapper — same pages, a login screen, worse fonts. That's a fair thing to suspect, so let's deal with it first: this one is native, and the reason we took our time is the whole story. Bassfinity for iOS is live on the App Store today. The AI Fishing Guide, the Intelligence Map, SpotLens, TackleLens, BassLens, SolunarBass — in your pocket, on the boat, at 5 a.m. in a gravel lot with one bar of service. Download Bassfinity on the App Store → It has been almost two years since the first line of this thing was written — and the first line was public. That's long enough that we owe you an explanation and short enough that we still remember all of it, so here's the actual road. It Started as a Complaint, in a Public Repo September 2024. The complaint was simple and probably yours too: every fishing app is a weather widget with a fish on it. They'll tell you the moon phase. They will not tell you whether to get out of bed. So we wrote something that would — and we wrote it in the open. SolunarBass https://github.com/bassfinity/solunarbass was a small Python app that pulled solunar tables, weather, and your location and folded them into an actual recommendation instead of a chart. We put it on GitHub under an MIT license, where anyone could read the math and tell us we had it wrong. It is still running today https://solunarbass-h9jxdwh8usuzhpix2yessm.streamlit.app/ , on Streamlit, doing exactly what it did then. That repo is this whole company in miniature. Show the work. Let it be checked. If the recommendation can't survive someone reading the source, it wasn't a recommendation — it was a guess with a nice font. On December 28th, 2025, we pushed to it for the last time and started bassfinity.com the same day. SolunarBass /products/solunarbass came over first, then when the hard water arrived. A lot of December and January, and a working answer to "is today worth it." /products/icelens IceLens Then We Stopped Shipping and Went Fishing February through May, our commit history goes nearly flat. From the outside that looks like a project dying. It's the part of this we're proudest of. We had figured out that the hard problem wasn't building more features — it was knowing whether the ones we had were right . You cannot answer that in a text editor. So we went and read, and then we went and got wet, and there was a great deal more of the second one. Weekends were nine and ten hours a day on the water. Weekdays it was a full-time job. We matched the hatch and then went out and either proved it or didn't. We tested equipment until we knew which recommendations held up in a chop and which ones only sounded good written down. And we caught a lot of fish — using early, unglamorous versions of what would become Bassfinity. Every one of those days either confirmed a tool or killed one. That is where the products got their judgment, and it is the part you can't read your way to. SpotLens /products/spotlens is confident about where to sit because we spent a season sitting in the wrong places. is opinionated because we watched the other opinions lose. The literature told us what ought to be true; the water told us what was. /products/tacklelens TackleLens The reading mattered too, and you can check our work on it, because we published as we went — the pre-spawn transition /blog/pre-spawn-bass-reading-the-transition , the lactic-acid clock /blog/bass-lactic-acid-catch-and-release-science , matching the hatch /blog/match-the-hatch-may-june-bass . The code was quiet. The reading wasn't, and the water certainly wasn't. Every feature we shipped after May came out of that stretch. The AI Chapter June and July is where it compounds. The Intelligence Map /products/intelligence-map to read the whole lake before you launch. for where to sit and which way to cast. Elevation View for 3D bathymetry. Then the /products/spotlens SpotLens — one conversation that reaches into every other product and hands back a single answer. /products/ai-guide AI Fishing Guide Which is where it got uncomfortable, because "we added AI" is the emptiest sentence in software right now. Anyone can bolt a chatbot onto an app and let it guess confidently about your lake. The question nobody wants to answer is: how would you know if it were wrong? So We Let Someone Else Grade It We partnered with Anuclei https://www.anuclei.com/ and put the AI Fishing Guide on their platform, which does evaluation and scoring and acts as the system of record for how our AI actually behaves. https://www.anuclei.com/multisynapse Multisynapse Concretely: every Guide conversation gets reported for scoring. The thumbs up and thumbs down you leave feed human evaluation. And we run a grounding eval in continuous integration as a regression tripwire — if a change makes the Guide start answering from thin air instead of from live data, the build tells us before you ever see it. That is the unglamorous version of AI, and it's the only version we're willing to put your morning on. When the data isn't there, the Guide says so. We'd rather it disappoint you honestly than impress you incorrectly. And Now It's in Your Pocket Which brings us to the reason any of this needed an app. Fishing happens in exactly the conditions a website is worst at. Cold hands. Bright sun. One bar of service, or none. A decision you need in nine seconds because the wind just switched. The browser was never going to be good enough at that, and we weren't interested in shipping a wrapper and calling it native. So: one subscription, everywhere. Bassfinity Pro is tied to your account, not your device. Subscribe on the web or in the app and Pro unlocks on both — and if you're already a Pro member, the app is simply yours. Sign in and everything is where you left it: your lakes, your spots, your chat history with the Guide. Pricing hasn't moved and isn't going to as a launch trick: $4.99 a month, or $39.99 for the year. Same as it was, on whichever device you happen to be holding. What's Honest About Where We Are This is version one. It has the products we trust and not yet every last thing the site can do, and we'd rather ship the ones we've tested than the whole menu half-cooked. If something's missing or wrong, tell us — support /support goes to actual people who fish. Two years from an open-source side project to the App Store, with four of those months spent reading instead of shipping. We'd make the same trade again. Download Bassfinity on the App Store → Go pin your home lake and ask it what tomorrow looks like. Tight lines. — The Bassfinity Team