Tanklet: Idle Fish Aquarium
Breed & collect koi betta fish
About
Create and manage your own virtual aquarium. Care for a variety of fish, breed rare species, and decorate your tank. Enjoy the relaxing experience of fishkeeping without the real-world mess or cost.
What's New in Tanklet
1.3.1
August 31, 2026
A new fish, and breeding mutations you can actually see. · New species: Red Swordtail — the freshwater classic trailing a crimson blade, now in the shop and the collection. · Mutant offspring: mutated fry now wear a clearly different coloration — unmistakable in the tank, in details and in storage — with a soft violet shimmer. The collection gains a “Mutant” slot for every species, and mutants you bred earlier are credited automatically. · Storage: tap any fish to see its details (name, species, stats, bond) — no more guessing who is who. The storage list has been redesigned to be cleaner. · Fixes: breeding no longer labels ordinary fry as mutations; fish away on expedition can’t be released or moved. Thanks for every bit of feedback!
MoreSubscription plans
Tanklet+ Monthly
Double coins, auto-care & more
In-App Purchases
$0.99
Handful of Pearls
60 pearls for rare fish & boosts
Developer apps
FAQ
Does Tanklet have ads?
No, Tanklet is ad-free and does not contain advertisements. The developers emphasize a clean experience with no third-party SDKs or data collection.
What fish can I collect in Tanklet?
You can collect a variety of fish species including clownfish, blue tang, angelfish, golden arowana, and koi. The game also allows breeding for rare variants and shiny fish.
Can I play Tanklet offline?
Yes, Tanklet grows while you're away, and coins accrue even when the app is closed. You can collect offline earnings upon returning to the game.
How do I get rare fish in Tanklet?
Rare fish can visit your tank from time to time. Treating them well with food and decorations may encourage them to stay. You can also hatch mystery eggs, with drop rates disclosed and a pity system for rare finds.
What are the subscription benefits for Tanklet+?
Subscribing to Tanklet+ offers double coins, extended offline earnings (8 to 24 hours), auto-care while away, a monthly pearl gift, and exclusive decor items.
What devices does Tanklet support?
Tanklet is supported on iPhone and iPad devices. It also features iCloud syncing across devices.
How often is Tanklet updated?
The latest version is 1.3.1, last updated on August 31, 2026. While specific update frequency isn't detailed, the app has received updates since its release on August 3, 2026.
Is Tanklet suitable for children?
Yes, Tanklet has an age rating of 4+, making it suitable for younger players. The game focuses on gentle care and collection mechanics.