Primality app icon

Apps Like Primality for iPhone and iPad

Check if a number is prime

Determine if a number is prime or list its prime factors. Input any integer between 0 and 999,999,999,999. Identify the prime ordinality of a prime number, showing its position in the sequence of primes.

by Bruce Schechter★ 4.926 ratingsUtilitiesFreeData updated 2026-09-26

Primality screenshots

Ranked alternatives

Showing 621–640 of 1,000 ranked alternatives.

  1. SureMark app icon

    SureMark

    SureMark Digital Identity Services Inc.

    ★ 5.01 ratingsUtilitiesFreeData updated 2026-09-06
  1. VPN Ease app icon

    VPN Ease

    NEXTAP TECHNOLOGY PTE. LTD.

    ★ 3.73 ratingsUtilitiesFreeData updated 2026-09-06
  2. Modular Arithmetic app icon

    Modular Arithmetic

    Benjamin Burton

    Calculations with a fixed modulus N.

    The app performs arithmetic modulo N with a fixed modulus. It supports large numbers, fast modular division and exponentiation, and can display a calculation transcript.

    ★ 5.04 ratingsEducation$1.99Data updated 2026-10-18
  3. Fraction Help Calculator app icon

    Fraction Help Calculator

    Armchair Engineering

    Solve fractions and view steps

    Solve equations with addition, subtraction, multiplication, and division. View step-by-step working to understand solutions. Handle mixed and partial fractions. Convert between decimals and fractions. Find factors of numbers or common factors.

    ★ 4.812 ratingsUtilities$2.99Data updated 2026-09-08
  4. Calc Sharp app icon

    Calc Sharp

    锦文 游

    A practical text calculator tool.

    The app offers a practical text calculator with WYSIWYG display. It supports basic arithmetic, exponentiation, radicals, logarithms, factorials, permutations, combinations, trigonometric functions, hyperbolic functions, and more.

    ★ 0.00 ratingsProductivityFreeData updated 2026-11-05

How we rank alternatives

Apps are ranked by functional similarity, category fit, rating confidence, and popularity.