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Best Prime Number Calculator App

211+ iOS apps curated and reviewed

4.6 avg rating
17 free apps
Updated June 2026

Digits Tape Calculator is the household name in prime number calculator app, but it's far from the only option. We track 211+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Top Picks for Prime Number Calculator App

Digits Tape Calculator#1

Digits Tape Calculator by Shift

The calculator for humans
Editor's Choice
🔧 Utilities
4.8😊(1.1K ratings)
$1.99In-App Purchases
Digits Tape Calculator screenshot 1
Digits Tape Calculator screenshot 2
Digits Tape Calculator screenshot 3
Digits Tape Calculator screenshot 4
Digits Tape Calculator screenshot 5
Digits Tape Calculator screenshot 6

Try Digits Tape Calculator, the calculator designed for humans. With a unique correctable tape feature, spreadsheet-like editing, and calculator simplicity, it's perfect for tracking expenses and budgets. Get organized on-the-go with Digits 3 for iOS.

What We Love

  • 🚀 Best tape calculator
  • 👍 Intuitive and user-friendly interface
  • 💡 Editable and commentable saved tapes
  • 🚀 Resizes well on iPad

Room to Improve

  • 🐛 Bug with iOS 26 where number pad doesn't return after adding comments
  • 🐛 Slow to load and unresponsive on some devices
  • 👎 Lack of iCloud sync between devices
Calculator ##2

Calculator # by Incpt.Mobis

Scientific Calculator
Strong Contender
🔧 Utilities
4.6😐(36K ratings)
FreeAdsIn-App Purchases
Calculator # screenshot 1
Calculator # screenshot 2
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Calculator # screenshot 5
Calculator # screenshot 6

Calculate complex mathematical equations effortlessly with this intuitive app. Simplify your calculations on the go with advanced features like graph plotting and equation solving. Download now to supercharge your math skills!

What We Love

  • 👍 Easy to use
  • 🚀 Powerful functionality
  • 💡 Helpful for math classes
  • ⭐ Great for students

Room to Improve

  • 🔍 Confusing interface after update
  • 📢 Too many intrusive ads
  • 💰 Paywall for advanced features
Color Calculator-smart&cute#3

Color Calculator-smart&cute by Wuhan Ananta Technology Co., Ltd.

Cute calculator app with theme
Worth Considering
🔧 Utilities
4.7😊(15K ratings)
FreeAdsIn-App Purchases
Color Calculator-smart&cute screenshot 1
Color Calculator-smart&cute screenshot 2
Color Calculator-smart&cute screenshot 3
Color Calculator-smart&cute screenshot 4
Color Calculator-smart&cute screenshot 5
Color Calculator-smart&cute screenshot 6

A color calculator app that helps users find complementary color schemes for design projects. Simply input a base color and let the app generate harmonious color combinations for your projects. Try it now to elevate your design choices!

What We Love

  • 💫 Colorful and fun design
  • 🎨 Variety of customizable themes
  • 🧠 Helpful for learning math
  • 🎉 Engaging and enjoyable to use

Room to Improve

  • 💰 Paid features and VIP options
  • 📺 Excessive ads and video ads
  • 🐌 Occasional lag and performance issues

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This all-in-one calculator app offers a wide range of features and tools, including multiple calculator views, unit conversion, history, and more, making it a comprehensive solution for everyday calculations and complex needs. With its user-friendly interface and extensive functionality, it's an ideal app for anyone looking for a versatile calculator that's free and ad-free.

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