Aquarium Harmony
Fish Tank Care & Water Log
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
Your aquariums, thriving. Track water, get smart care reminders, and watch a living picture of your tank's health - on iPhone and Apple Watch.
Aquarium Harmony is the calm, beautiful way to keep every fish tank thriving. Log water tests, build a care routine with smart reminders, and watch your aquarium come alive as a living, breathing picture of its real health - on iPhone, Apple Watch, and your home screen.
Whether you keep a planted tank, a reef, a betta, shrimp, cichlids, or a classic freshwater community, Aquarium Harmony turns scattered notes and guesswork into one clear answer: what does my aquarium need today?
A LIVING AQUARIUM, NOT A SPREADSHEET
Every tank gets its own living world - water that brightens with good care and dims when maintenance slips. Three health rings show Care, Water, and Stability at a glance, with a full breakdown explaining every factor behind them.
WATER TESTING MADE SIMPLE
• Log pH, ammonia, nitrite, nitrate, temperature, GH, KH, TDS - plus salinity, alkalinity, calcium, magnesium, and phosphate for marine and reef tanks
• Clear trend charts with safe ranges for your exact setup
• Spot drift early: rising nitrate, falling KH, temperature swings
• Stability tracking shows which parameters hold steady and which wander
SMART CARE REMINDERS
• Water changes, filter maintenance, plant trimming, dosing, equipment checks - on your schedule
• Feeding schedules with portions, so everyone in the family knows who fed the fish
• One "Next up" priority every day: never wonder what matters most
• Complete care from your wrist with the Apple Watch app
KNOWS YOUR FISH
A built-in species guide with 70+ popular fish, shrimp, snails, corals, and plants. Aquarium Harmony reads your real stock: preferred water ranges, group-size suggestions, and compatibility notes - turned into friendly insights, not alarms.
YOUR AQUARIUM'S MEMORY
• A unified timeline of every test, water change, milestone, and photo
• Take photos in the app and watch your aquascape evolve
• Day counters, care streaks, and milestones celebrate the relationship you're building
APPLE WATCH, WIDGETS & COMPLICATIONS
• Full watch app: today's care, health rings, and one-tap task completion
• Home-screen widgets for one tank or your whole fishroom
• Watch-face complications and Smart Stack support
SHARE & BACK UP
Export any aquarium as a compact encrypted file - share your setup with friends or move it to a new device in seconds.
FREE & PREMIUM
Aquarium Harmony is free for one aquarium with core care tools. Premium unlocks unlimited aquariums, deeper analytics (forecasts, correlations, full health breakdowns), your complete history, weekly reports - and removes ads. Subscriptions renew automatically until cancelled; a one-time lifetime purchase is also available. Prices are shown in the app before any purchase.
PRIVATE BY DESIGN
No account required. Your data lives on your device - export it anytime.
Whether you're cycling your first 10-gallon tank or managing a fishroom full of aquariums, Aquarium Harmony gives your underwater world the calm, consistent care it deserves.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://seatemp.link/AquariumHarmonyPrivacyPolicy.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Thanks for caring for your aquariums with Aquarium Harmony!
• Sharing an aquarium now includes an App Store link, so friends can open your shared tank in the app
• Added an optional "Support development" link for anyone enjoying the app - completely optional, everything stays free
• Minor fixes and refinements
Questions or ideas? Reach us anytime from Settings - we read every message.
The developer, Georgiy Gorokhov, 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:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Georgiy Gorokhov
- Size
- 16.2 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later. - Apple Watch
Requires watchOS 11.0 or later.
- iPhone
- Languages
- English and German
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Premium — Lifetime $39.99
- Premium — Annual $19.99
- Premium — Monthly $4.99
- Copyright
- © 2026 Georgiy Gorokhov