Moon Dog
Small, useful apps for hobbyists and makers. No subscriptions, no ads.
Available now
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Frost: Cold Plunge Care
Dosing math and maintenance reminders for chlorine or hydrogen-peroxide cold plunges — chiller or DIY.
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Soak: Hot Tub Assistant
Spa chemistry made simple. Dosing math for chlorine and bromine tubs.
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Reef: Aquarium Chemistry
Saltwater reef dosing — calcium, alkalinity, and magnesium — with safe daily-rise limits.
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Crust: Pizza Dough Calculator
Style-aware dough math, a cold-ferment backtimer, and a symptom troubleshooter.
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Aquascape: Planted Tank Calc
Planted-aquarium fertilizer dosing — EI, PPS-Pro, PMDD, or custom, dry salts or brand-aware liquids.
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Flux: Glaze Chemistry
Pottery glaze chemistry — live UMF, per-oxide limit warnings, materials library, cone reference.
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Crop: Hydroponic Calculator
Hydroponic nutrient dosing — target ppm to salt weights or brand kits, per-crop targets, EC/pH logging.
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Pond: Koi Chemistry
Koi pond water chemistry — corrective doses for KH, ammonia, nitrite, with named-source warnings.
Coming soon
More single-purpose calculators in review or on the way: Saline (saltwater pools), Splash (chlorine pools), Watt (van & RV solar), Well (off-grid water), Trace (soap), Temper (knife heat-treat), Hide (leatherwork), Press (hard cider), Flush (mushroom cultivation), Strip (jerky safety), Seal (home canning), and Cure (food dehydrating).