Free · private · offline · no account required
If you cultivate mushrooms at home — oyster, shiitake, lion's mane, cubes or anything else — you already know that memory is a terrible grow log. Was that tub inoculated on the 3rd or the 5th? How many grams did the second flush actually give? Which substrate keeps getting Trichoderma? ShroomLog is a focused grow log app that records all of it so your next grow is better than your last.
Open the grow log →Each grow gets a dated timeline. Add an entry for inoculation, colonization (with a running percentage), full colonization, the move to fruiting conditions, pinning, and then every harvest. A grow card always shows the current stage, how many days the grow has been running, and total yield so far — no spreadsheet wrangling.
Mushrooms fruit in flushes, and the only honest way to know what a substrate or species really produces is to weigh each one. ShroomLog records the flush number and grams for every harvest and automatically sums total yield per grow — so you can finally answer "is masters mix worth it for lion's mane?" with data instead of a guess.
Log a contamination event with the type — green mold, cobweb, bacterial blotch, wet spot — and ShroomLog keeps a record across all your grows. Over a few months that turns into a clean-rate and a breakdown of what fails most often, which is exactly the feedback loop that turns a beginner into a consistent grower.
Everything lives in your browser's local storage. There's no sign-up, no cloud, no tracking, and nothing leaves your device. Add it to your home screen and it works in the grow room with no signal. The core log — unlimited grows, stage tracking, yield totals and full history — is free forever. A one-time Pro unlock adds CSV export, per-species yield stats, contamination analysis and grow comparison.
Start your grow log →