Education
Cotter AL Abacus
A virtual double-sided RightStart-style abacus for visualizing quantities.
Useful alongside guided arithmetic lessons
Five-and-ten grouping connects bead patterns with mental strategies.
Keep in mind: It is a teaching model rather than an automatic calculator; improvement claims are not verified.
Inside the app
Official product images
What you can do
- Grouped bead quantities
- Second-side place-value trading
- Linked sample lessons
Good for
- Learners using the RightStart approach
Consider alternatives for
- An automatic numerical calculator
Limitations & considerations
- Captured minimum: iOS 13.0.
- It is a teaching model rather than an automatic calculator; improvement claims are not verified.
Privacy & permissions
Lesson links open external resources; parents should supervise browsing and review the official disclosure.
Sources & review notes Updated Nov 11, 2026
Reviewed by iApp4Me Editorial Team. Recommendations use the linked documentation and attributed accounts; device observations are identified separately.
- US App Store developer description
Complete description, download price and compatibility metadata captured 2026-11-02.
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