Aquarium & Fish Breeding Log

Is your fish sick? Is your water safe? Will these two species get along? Aquarium Notebook answers all of it in one app — no account, no internet, no server.

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DAILY CARE TOOLS (all free)
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🧪 WATER QUALITY LOG
Record pH, GH, KH, TDS and temperature. The app tells you whether your readings sit in a safe range. See the history and catch a problem before your fish get sick.

🤝 COMPATIBILITY CHECK
Pick two species and find out whether they can share a tank. Temperament, temperature, hardness and space needs are weighed together.

🦐 SHRIMP WATER MATCH
Enter your water values and see which shrimp species can actually breed in it — hybrid warnings included.

🔎 GUPPY STRAIN FINDER
Identify your guppy's strain in 8 questions, based on tail shape, pattern and colour.

👶 FRY DEVELOPMENT
From egg to free swimmer, day by day. Stage-by-stage visuals for betta, cichlid, guppy and more.

📐 TANK VOLUME CALCULATOR
Enter your tank dimensions and get real water volume in litres.

📚 GUIDES
Setup, water parameters and species care — plain language, fully offline.

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LOGBOOK & BREEDING
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🐠 LIVESTOCK RECORDS
Log more than 100 species with lifelike illustrations: count, sex, variety and date acquired. Manage several tanks and switch between them with one tap.

🤰 BREEDING TRACKER
Gestation and maturity data for over 130 species comes built in. Due-date countdown, fry colony tracking, growth stages. Every duration is editable — if the textbook average doesn't hold in your tank, enter your own number.

🧬 GENERATION TRACKING
Follow F1, F2 and F3 in per-fish albums. Add a photo and a note to each generation and keep your bloodline readable for years. Built for breeders.

🐟 BREEDER MODE
A single-species breeding console: today, production, stock and lineage on one screen.

🕰️ PHOTO TIMELINE
Record growth with photos. Add a date and note to each one; the app works out how much time has passed.

🔔 REMINDERS
Water changes, filter cleaning, approaching birth, fry milestones. Notifications are generated entirely on your device.

📊 STATISTICS & PDF
Species breakdown, birth calendar, fry development and a financial summary in one place. Save the report as PDF or print it.

💰 EXPENSE LEDGER
Food, equipment, medication, plants and sales. Monthly reports show what the hobby actually costs.

💾 BACKUP
Back everything up to a single file and restore it when you change phones.

🌙 Dark and light theme · 🌍 11 languages

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PRIVACY
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No account. No server. No tracking. Your tanks, livestock, photos and records stay on your device. The app never browses your gallery; it receives only the photo you pick through the system picker.

The app runs offline. Internet is used for ads only, and a single one-time purchase removes them completely.

Works for guppy, molly, platy, betta, shrimp, snail, cichlid, tetra, goldfish and hundreds more. Simple enough for a first tank, deep enough for a breeder.