Supported Features
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Dark Interface
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Differentiate Without Color Alone
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Sufficient Contrast
Fuse 6×6
Merge, break iron, stay alive
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
A simple puzzle where you swipe to merge numbers on a 6x6 board.
It keeps the feel of the original, and eight kinds of panels drop onto the board to make every run different.
= Eight panels that drop onto the board
- x2 / x4 - once charged, doubles or quadruples a number with no partner needed
- Magnet - pulls every matching number across the board and steps each one up
- Up - raises the four neighboring numbers one step, then disappears
- Bomb - explodes in a cross of 5 cells. Iron is destroyed, numbers drop four steps
- Sweep - clears every 2 on the board. The longer it charges, the more room it opens
- Iron - a blocker that never merges. It moves only one cell per turn, and only a bomb removes it
- Wood - a lighter blocker. Move it three times and it breaks on its own
Helpful panels do not merge while they are charging. That gives you time to arrange the board and aim them at the number you actually want, so you never spend one by accident.
= Breaking iron is what keeps you alive
Iron is a blocker only bombs can remove, but every one you break pays you back.
- Every 10 you break earns an extra life (up to 5)
- Spending a life clears up to 18 tiles of 64 or less, smallest first, so you can keep going
- Each break has a 30% chance to shield your largest number, absorbing one blast
The more you have built up, the harder it is to lose.
= Global leaderboards (opt-in)
Compete on score, moves, and iron destroyed. Taking part is your choice, and only the final numbers are sent.
= Also
- No connection needed to play (only the leaderboards go online)
- Stop anytime and pick up where you left off
- No ads
- Free to play. When you are truly stuck, you can buy three continues (one-time purchase, optional)
Numbers stay exact all the way to 2^1023. See how far you get.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- The board now fills the full width even on devices with shorter screens. Item descriptions appear only when you tap an item.
- Number tiles and iron tiles are now easier to read and tell apart.
The developer, Yasuhiro Nakazawa, 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 Linked to You
The following data may be collected and linked to your identity:
- User Content
- Identifiers
- Usage Data
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- Yasuhiro Nakazawa
- Size
- 40.9 MB
- Category
- Puzzle
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 9 more
- English, French, German, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- Infrequent
Contests
- In-App Purchases
Yes
- 3 Continues $0.99
- Copyright
- © 2026 Nanana