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.
Primality screenshots
Ranked alternatives
Showing 321–340 of 1,000 ranked alternatives.


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.

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.

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.



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.





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.



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.



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.

US Military Rank & Reference
Program Executive Office for Enterprise Information Systems, Sea Warrior Program

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.
How we rank alternatives
Apps are ranked by functional similarity, category fit, rating confidence, and popularity.