AquaMaster: Aquarium Log Book
Water Change Reminders & Log
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
New: search your logs — see what you fed or how often you changed water, instantly. Plus a Lifetime purchase option and a redesigned share card.
Keeping fish can be elegant and scientific!
"AquaMaster: Aquarium Log Book" is the ultimate tank management app designed for aquarium enthusiasts. Whether you are a beginner with a simple goldfish bowl, or a seasoned hobbyist maintaining high-end aquascapes and marine reefs, this app helps you wave goodbye to messy paper logs and keep your aquatic ecosystems thriving.
【Free to Start】
No payment required to get started — the free plan lets you manage 1 tank. Upgrade to a subscription or the Lifetime plan anytime for unlimited tanks and advanced features.
【Core Features to Protect Your Aquarium】
● Built for iPad
- Browse your tank list and read tank details side by side in a native two-column layout.
- A new iPad dashboard greets you with today's weather and a summary card for all your tanks.
- The calendar and water parameter charts stretch out to fill the bigger screen, so you can see more history at once.
● Multi-Tank Management
- Support for creating and tracking multiple aquariums (e.g., freshwater, reef, planted, shrimp tanks) simultaneously.
- Keep separate water logs, maintenance schedules, and stats for each tank, ensuring your aquatic life stays perfectly organized.
● Scientific Water Quality Tracker
- Log pH, NO2, NO3, water temperature, salinity, and other critical parameters with ease.
- Visual charts help you track water trends and detect ecological issues before they become crises.
- Features WeatherKit integration, correlating local weather changes with your tank's behavior.
● Smart Maintenance Reminders
- Never forget water changes, feeding schedules, filter cleanings, or dosing additives again.
- Customize your own routines and receive timely push notifications tailored to your lifestyle.
● Test Strip Camera Scanner & Quick Entry
- Say goodbye to tedious typing! Simply snap a photo of your water test strip with the camera. The app uses Vision technology to analyze the color blocks and "pre-fill" your parameters.
- Designed for real-world lighting! Includes an intuitive adjustment picker. If lighting causes minor detection variances, you can easily tweak the values on-screen before saving.
● Home Screen Widgets
- Keep an eye on your aquarium at a glance — no need to open the app.
- Small widget shows your next reminder and the tank it belongs to; Medium widget automatically switches between your latest water readings and today's & tomorrow's reminders.
- Fully localized in English & Traditional Chinese, following your in-app language.
● Your Data Stays Yours
- All your tank logs and water parameters are stored in your personal iCloud account, encrypted and synced via Apple CloudKit — never uploaded to our own servers.
- Switch devices anytime; as long as you're signed in with the same Apple ID, your data picks up right where you left off.
- Available on the free plan too — this isn't a paid-only feature.
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【One-Time Purchase Option】
Prefer not to subscribe? We also offer a "Lifetime" plan.
- Pay once to unlock unlimited tanks and advanced analytics for good.
- No auto-renewal, no recurring charges — ever.
【About Auto-Renewable Subscriptions】
Unlock unlimited tanks and advanced analytics by subscribing to our "Hobbyist" or "Pro" plans.
- Subscription cycle: Monthly auto-renewal.
- Payment will be charged to your iTunes Account at confirmation of purchase.
- You can turn off auto-renewal at any time by going to your iPhone's Account Settings after purchase.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://pk3696666.github.io/aquarium-policy/privacy-en.html
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
This update brings log search, a one-time Lifetime purchase, and a redesigned share card!
● Log Search
"When did I last replace the filter media — and which one did I use?" "How many times did I feed this month?" "When did I last dose supplements?" "What did I medicate with, and how long ago?"
Type a few words or tap a log type, and every matching entry shows up — notes and all, with a running count.
● Lifetime Purchase
Not a fan of subscriptions? Pay once and unlock every Pro feature for good.
● Redesigned Share Card
The water quality share card has a whole new look that matches the app's glass-like style — and you get to pick which reading takes center stage.
Thanks for keeping your tanks happy with us. We'd love to hear your feedback!
The developer, ChenHui Hung, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- ChenHui Hung
- Size
- 20.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.2 or later.
- iPhone
Requires iOS 26.2 or later. - iPad
Requires iPadOS 26.2 or later. - Mac
Requires macOS 26.2 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.2 or later.
- iPhone
- Languages
English and 2 more
- English, Japanese, Traditional Chinese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Lifetime ₹ 4,999
- Pro Monthly ₹ 799
- Hobbyist Monthly ₹ 199
- Copyright
- Copyright © 2026 ChenHui Hung