Aquarium Haven 3D: Fish Tank
Relaxing Coral Reef Simulator
Free · Designed for iPad. Not verified for macOS.
Dog Tracker is now Aquarium Haven 3D: a calm 3D aquarium with 50 real-looking fish. The coral reef tank is free, and one purchase unlocks it all. No ads, no subscription.
Real-looking tropical fish, goldfish and a coral reef glide through a 3D aquarium in your hand. Nothing to keep alive and no timers to chase: just a quiet tank to look at whenever you want a calm moment.
Start free with the Coral Reef tank and 6 marine fish. One purchase unlocks everything. No ads. No subscription.
THREE AQUARIUMS, 50 SPECIES
- Coral Reef: clownfish, blue tang, yellow tang, royal gramma and more among corals and live rock
- Planted Tropical: schools of neon tetras, discus, angelfish, guppies and bettas over green plants
- Goldfish & Medaka: ryukin, oranda, ranchu, medaka and a small koi
Each fish is a detailed 3D model that swims in schools, turns and drifts at its own pace.
A TANK THAT FOLLOWS YOUR DAY
- The light follows the time of day: bright mornings, warm evenings and soft moonlight at night
- After dark, night creatures come out: a moray eel, a cleaner shrimp, glowing moon jellyfish, flashlight fish and an octopus
- Gentle background music with the sound of water and bubbles (each can be turned off)
MAKE IT YOURS
- Plant corals on the sand and scatter food to watch the fish gather
- Select a coral or rock to move it along the bottom, delete a coral you planted, or undo your last change
- Hide the Glass (Underwater View) in Settings removes the tank frame, so you look out as if you were in the sea
- Tap any fish to see its name and a short guide (Field Guide)
- Tilt your phone and the water sways
- Viewing mode hides every button so only the aquarium remains
- A small clock on the tank (on by default, off in Settings)
- Take photos of your tank and use one as your wallpaper
- Home Screen and StandBy widgets show your aquarium
ON A FOLDABLE IPHONE
On iPhone Duo, fold it halfway: the top screen shows the aquarium from the front, and the bottom screen shows the reef from above, where you plant corals and feed. Open it and the tank light comes on. Turn it sideways for a desk aquarium with a clock. Close it and a small window on the outside screen keeps a favorite fish company.
HOW TO ENJOY
1. Open the app: the coral reef is already swimming
2. Plant a coral or scatter food, then tap a fish to learn about it
3. Turn on viewing mode and let it run beside you while you work, read or rest
ONE-TIME PURCHASE: UNLOCK ALL
A single purchase unlocks all three aquariums and all 50 species. No ads and no subscription. If you bought Premium in Dog Tracker, everything is already unlocked.
FOR DOG TRACKER USERS
This app used to be Dog Tracker. Your earlier records and photos are kept, and you can move them to our app Pawlog from Settings.
Questions and ideas: https://keik.co.jp/wp/app-inquiry-form/
Ratings & Reviews
- Light rays now fall softly from the water surface and no longer poke through it when you look up from below.
- Fixed an issue where planted corals could disappear.
- Fixed an issue where tapping "Restore Purchases" right after buying could lock the tanks again.
- Morning and evening colors in photos, wallpapers and the widget now match the screen.
- Night creatures now follow the rocks you move and the corals you plant.
- Smoother performance and small fixes.
Dog Tracker has been reborn as Aquarium Haven 3D: a calm 3D aquarium with 50 real-looking fish, a coral reef, a planted tropical tank and a goldfish tank.
- Your earlier records: the records and photos you kept in Dog Tracker can be moved to our app Pawlog. Open Settings and tap "Move to Pawlog". Please move them before you delete this app.
- Premium: if you bought Premium before, every aquarium and fish is already unlocked.
- Widget: the widget you already placed now shows your aquarium.
Thank you for using Dog Tracker all this time.
The developer, KeiK LLC, 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 Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- KEIK, LIMITED LIABILITY COMPANY
- Size
- 65.3 MB
- Category
- Simulation
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 32 more
- English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
4+
- 4+
- Copyright
- © 2026 KEIK, LLC