Words and fish
Learn about fish, think hard about words, what more could you want?
Soooo addicting, amazing game
Stop reading this and just download and play it
Free
In-App PurchasesWith Ads
About
This word game challenges you to form words by adding up to three letters to a base three-letter combination. Solve puzzles to collect over 100 unique fish and unlock new themes with calming soundscapes. Play in various modes, including a kid-friendly option, or use the night light mode to relax.
✓Form words from three-letter bases
✓Collect over 100 unique fish
✓10 calming underwater themes
✓Timed night light mode
✓Multiple game modes (casual, standard, challenge)
✓Daily Challenge with streak bonuses
✓Pass-and-play versus mode
Show original description
What's New in Think Tank
1.0.3
July 24, 2026
Improved leaderboard experience for daily challenges.
1
In-App Purchases
$3.99
Ad-Free Forever
Remove ads forever! + bonus items and a special fish =)
User reviews
FAQ
What is Think Tank?
Think Tank is a free word game where you solve puzzles by adding letters to three-letter combinations to form new words. It features over 100 fish to collect and 10 unique themes.
How do you play Think Tank?
You are given a three-letter base and must add up to three more letters to create valid words. The game offers casual, standard, and challenge modes, with puzzles designed for different skill levels.
Can I play Think Tank offline?
Yes, Think Tank can be played offline. The description mentions playing in long lines or at nap time, implying offline accessibility for core gameplay.
Does Think Tank have ads?
Yes, Think Tank contains advertisements. An optional payment is available to remove these ads.
What age rating is Think Tank?
Think Tank has an age rating of 9+. This suggests it is suitable for children aged 9 and older.
How often is Think Tank updated?
Think Tank was last updated on July 7, 2026, with version 1.0.2. This indicates recent development activity.
What makes Think Tank unique?
Think Tank combines word puzzles with a fish collection mechanic and relaxing underwater themes. It also features a unique night light mode for bedtime relaxation.
Is there a way to play Think Tank with friends?
Yes, Think Tank includes a pass-and-play versus mode, allowing you to challenge a friend directly on the same device.