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 321–340 of 1,000 ranked alternatives.

  1. somos wim app icon

    somos wim

    AT&T Comercializacion Movil, S. de R.L. de C.V.

    ★ 3.523 ratingsUtilitiesFreeData updated 2026-09-06
  2. Rescu – Saves Lives app icon

    Rescu – Saves Lives

    Alarm Relay, Inc

    Alert emergency services in two taps

    Send emergency alerts to police, medical, or fire dispatch with two taps. Share location via GPS for quick response. Access emergency contacts and pre-set messages without speaking. Receive real-time updates on response status.

    ★ 4.465 ratingsLifestyleFreeData updated 2026-09-11
  3. Monkey Jump+ - The Craziest Jumpers Ever! app icon

    Monkey Jump+ - The Craziest Jumpers Ever!

    Hristo Zhelev

    Users jump on clouds to survive.

    The app involves users jumping on clouds to keep a score high and set new records. Users fall and die if they miss a jump.

    ★ 5.01 ratingsGamesFreeData updated 2026-10-18
  1. VPN Rapid: Fast Secure Proxy app icon

    VPN Rapid: Fast Secure Proxy

    WHEELCOURSE, SOCIETATEA CU RASPUNDERE LIMITATA

    Connect securely and browse privately

    Enable private internet browsing by connecting with a single tap. Access websites and stream content securely without logging browsing history or storing sensitive data. Protect online privacy and connect to Wi-Fi hotspots safely.

    ★ 3.751 ratingsUtilitiesFreeData updated 2026-09-06
  2. Ceiling Fan Balancer app icon

    Ceiling Fan Balancer

    pseudomath LLC

    Balance fan blades and place weights accurately

    Balance fans by analyzing wobble with phone camera. Number blades and record movement. View wobble strength in real time. Determine blade positions and weight placements to correct imbalance.

    ★ 4.2128 ratingsUtilities$2.99Data updated 2026-11-02
  3. RPN-25 CE app icon

    RPN-25 CE

    Willy Kunz

    Calculate with photo-realistic precision

    Simulate the HP-25C calculator with input method. Perform complex calculations, store and recall values, and use programmable functions. Access continuous memory for data retention. View and edit programs directly on the interface.

    ★ 4.69 ratingsUtilities$2.99Data updated 2026-10-01
  4. Houghton Revisited app icon

    Houghton Revisited

    Wide Eyed Vision limited

    Explore Houghton Hall's magnificent art collection.

    The app allows users to explore Houghton Hall and its art collection. Users can view masterpieces by various artists in their original setting.

    ★ 5.05 ratingsEducationFreeData updated 2026-10-16
  5. Simple Calculator - iCalc app icon

    Simple Calculator - iCalc

    Takao Ichimura

    Calculate, edit, and track expressions

    Perform arithmetic, root, and constant calculations. View calculation history and formulas. Access an information page for instructions and details.

    ★ 4.928 ratingsUtilitiesFreeData updated 2026-09-06
  6. ChessClock+ app icon

    ChessClock+

    Brad Bambara

    Set time controls for chess games

    Set time controls for each player with customizable phases and clock types including Fischer, Bronstein, and delay. Use hourglass mode to transfer time between players. Choose from presets or create custom settings. Receive alerts when time is low.

    ★ 4.9104 ratingsUtilitiesFreeData updated 2026-09-09

How we rank alternatives

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