Shake Box: Number Bonds
Shake & find the missing part
Free · Designed for iPad. Not verified for macOS.
New: Practice, with questions read aloud and progress for each child. Shake, cover, guess, reveal: children explore number bonds hands-on.
Shake Box makes number bonds visible: shake the counters and watch them land on two sides. Cover one side, let children guess how many are hidden, then lift the cover to check. This builds strong mental images that connect with numbers and number sentences – until children can work with the numbers alone.
• Guess first, then reveal: a number pad right on the cover; numbers larger than the whole can be locked
• Arranged like a real shake box: five in a row, then the next row on top; also ten frame, dice patterns, power of five, stacked pairs or free
• Part-whole model and fact family: addition and subtraction for every split, with the whole and the parts in color
• Number bonds: collect and order the splits you find – one house for each whole
• Practice: number bonds (how many counters are hidden?) and subitizing, with an optional quick look; questions can be read aloud; progress saved per name or initials, on this device only
• Adjustable number range; shake evenly or like real counters
• Share via link or QR code; English and German
• No ads, no data collection, works offline
Developed in close collaboration with Hans-Joachim Lukow and Angelika Albert of the Osnabrück Centre for Mathematical Learning, for use alongside the German Schüttelbox program.
For pre-K, kindergarten, first grade and math intervention – at school and at home.
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New: Practice
• Number bonds: one side is covered – how many counters are hidden? The number bonds house shows which splits have been found.
• Subitizing: see how many at a glance, with an optional quick look.
• Questions can be read aloud.
• Progress for each name or set of initials – saved on this device only.
Also
• Updated wording: counters, part-whole model, power of five, stacked pairs, hidden
• Minor improvements to layout and controls
The developer, Christian Urff, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Christian Urff
- Size
- 13.3 MB
- Category
- Education
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 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 German
- Age Rating
4+
- 4+
- Copyright
- © 2026 Christian Urff