Best +666666666666666688888888888888888 Apps & Games

14+ iOS apps & games curated and reviewed

4.3 avg rating
12 free apps & games
Updated May 2026

▸ Calculator + is the household name in +666666666666666688888888888888888, but it's far from the only option. We track 14+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Top Picks for +666666666666666688888888888888888

▸ Calculator +#1

▸ Calculator + by CAT VIET SOFTWARE DEVELOPMENT & MEDIA JSC

Scientific Calculator
Editor's Choice
🔧 Utilities
4.7😞(832 ratings)
$1.99In-App Purchases
▸ Calculator + screenshot 1
▸ Calculator + screenshot 2
▸ Calculator + screenshot 3
▸ Calculator + screenshot 4

Explore the ultimate scientific calculator with 800 formulas in the Formula Toolkit In-App, over 1 million worldwide downloads, and 12 calculators for various functions including currency and unit conversion, finance, statistics, and more. Simplify your calculations with this award-winning calculator since 2007.

What We Love

  • 👍 Handy to use application
  • 🔢 Great calculator
  • 📊 Excellent for engineering & other use
  • 🔢 Very useful

Room to Improve

  • 🐛 Date function does not fit iPhone screen
  • 🐛 Alternate calculators no longer work
  • 🐛 Good calculator but not all function work
Calculator, basic and advanced#2

Calculator, basic and advanced by Saren Inden

Math made easy
Strong Contender
🔧 Utilities
4.6(78 ratings)
FreeAds
Calculator, basic and advanced screenshot 1
Calculator, basic and advanced screenshot 2
Calculator, basic and advanced screenshot 3
Calculator, basic and advanced screenshot 4
Calculator, basic and advanced screenshot 5
Calculator, basic and advanced screenshot 6

This comprehensive calculator offers both simple and advanced mathematical operations, allowing users to solve equations, view step-by-step solutions, and visualize results through graphs and tables. With a wide range of supported operators and values, users can easily perform various calculations, explore mathematical concepts, and track their calculation history.

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Discover mental math tricks to calculate faster and impress friends with your math skills. Learn and practice fun and useful tricks to speed up calculations, perfect for everyday situations, and become more confident in your math abilities.

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This highly accurate calculator offers precision up to 100,000 digits and enables fast calculations in RPN mode or direct formula input, with a wide range of advanced mathematical functions and built-in constants. Try it out for complex calculations involving various number systems, including complex numbers, quaternions, and more.

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