1. Home
  2. Topics
  3. Four.nta

Best Four.nta Apps

207+ iOS apps curated and reviewed

4.3 avg rating
19 free apps
Updated June 2026

Out of 207+ FOUR.NTA apps on iOS, 19 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Four.nta Apps (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Calculator₊Calculator₊Free4.7★ (1.7M)YesYesAug 2026
2EduCalc ClassicEduCalc ClassicFree3.9★ (299)NoYesJul 2026
3Measuring Tape, Photo RulerMeasuring Tape, Photo RulerFree4.2★ (2.6K)YesYesJul 2026
4Calculator Air: AI Math SolverCalculator Air: AI Math SolverFree4.7★ (81K)YesYesAug 2026
5MathMaster: Math Solver & HelpMathMaster: Math Solver & HelpFree4.6★ (12K)YesYesAug 2026
6Algebra Math SolverAlgebra Math SolverFree4.0★ (7K)NoYesJul 2026
7FastMath - Take Photo & SolveFastMath - Take Photo & SolveFree4.2★ (51K)YesYesAug 2026
8Astra AI: Study & Exam PrepAstra AI: Study & Exam PrepFree4.8★ (3.1K)YesYesAug 2026

Top Picks for Four.nta

Calculator₊#1

Calculator₊ by Impala Studios

Basic, Scientific, Calc +-
Editor's Choice
🔧 Utilities
4.7😞(1.7M ratings)
FreeAdsIn-App Purchases
#95in Utilities
Calculator₊ screenshot 1
Calculator₊ screenshot 2
Calculator₊ screenshot 3
Calculator₊ screenshot 4
Calculator₊ screenshot 5
Calculator₊ screenshot 6

This app offers a comprehensive suite of calculation tools, including basic, scientific, and unit conversion functions. It features an AI-powered math solver that can solve problems from photos and a dedicated math notes section for jotting down equations and diagrams. Accessibility options like dynamic text size and VoiceOver support are also included.

What We Love

  • 💻 Useful calculator features
  • 🎨 Customizable backgrounds and themes
  • 📚 Helpful history tracking

Room to Improve

  • 📺 Intrusive full-screen ads
  • 💰 Expensive subscription model
  • 🔍 Ads blocking calculator functionality
EduCalc Classic#2

EduCalc Classic by William Jockusch

Strong Contender
📚 Education
3.9😊(299 ratings)
FreeIn-App Purchases
EduCalc Classic screenshot 1
EduCalc Classic screenshot 2
EduCalc Classic screenshot 3
EduCalc Classic screenshot 4
EduCalc Classic screenshot 5

This app functions as a powerful graphing calculator with extensive scientific functions, unit conversion, and a built-in math and science reference. It supports graphing multiple equations, polar coordinates, and implicit functions, making it ideal for complex calculations and homework.

What We Love

  • 👍 Easy to use
  • 🚀 Powerful features
  • 💡 Helpful references and resources
  • 🔒 Reliable performance

Room to Improve

  • 🐛 Occasional glitches and bugs
  • 🤔 Confusing interface in some areas
  • 🔍 Difficult to find certain functions
Measuring Tape, Photo Ruler#3

Measuring Tape, Photo Ruler by Grymala sp. z o.o.

Meter: measure length, height
Worth Considering
📊 Productivity
4.2😞(2.6K ratings)
FreeAdsIn-App Purchases
Measuring Tape, Photo Ruler screenshot 1
Measuring Tape, Photo Ruler screenshot 2
Measuring Tape, Photo Ruler screenshot 3
Measuring Tape, Photo Ruler screenshot 4
Measuring Tape, Photo Ruler screenshot 5
Measuring Tape, Photo Ruler screenshot 6

This app offers precise measurements using augmented reality and on-screen tools. It caters to both professional and everyday needs with features like a flexible measuring tape, bubble level, and photo ruler. Save and manage your measurements within projects for easy access.

What We Love

  • 🚀 Accurate measurements
  • 👍 Convenient and portable
  • 💡 Useful for various applications

Room to Improve

  • 🐛 Crashes and freezes
  • 🔋 High battery consumption
  • 💰 Excessive ads and paywalls

More Four.nta apps to explore

4
Calculator Air: AI Math Solver
Calculator Air: AI Math Solver
Calculator Air: AI Math Solver
Basic, Scientific & Photo Math
Free

Solve math problems instantly with a powerful AI-driven calculator. Features include basic and scientific calculations, a photo math solver, and an AI homework helper for step-by-step explanations. Ideal for students and professionals needing quick, accurate math solutions.

Basic and scientific calculatorPhoto math solverAI homework helper
🔧 Utilities
(81K)
subscription
5
MathMaster: Math Solver & Help
MathMaster: Math Solver & Help
MathMaster: Math Solver & Help
Homework Helper & AI Tutor
Free

Solve math problems instantly by taking a photo or entering an equation. Get step-by-step solutions to understand the process and improve your math skills. Covers a wide range of topics from basic arithmetic to calculus.

Camera-based problem solvingStep-by-step solutionsHandwritten and printed math recognition
📚 Education
(12K)
free with in-app purchases
6
Algebra Math Solver
Algebra Math Solver
Algebra Math Solver
Homework Camera Calculator
Free

Solve complex math problems by taking a photo or entering them manually. Get accurate solutions with detailed, step-by-step explanations to help you learn. Save your results for future reference and improve your grades.

Photo math problem solverManual equation entryStep-by-step solutions
📚 Education
(7K)
free with in-app purchases
7
FastMath - Take Photo & Solve
FastMath - Take Photo & Solve
FastMath - Take Photo & Solve
AI Math Problem Solver
Free

Instantly solve math problems by taking a photo, even handwritten ones. Get step-by-step solutions with explanations and graphical representations to improve your understanding and check your homework.

Photo math problem solverHandwritten problem supportStep-by-step solutions
📚 Education
(51K)
free with in-app purchases
8
Astra AI: Study & Exam Prep
Astra AI: Study & Exam Prep
Astra AI: Study & Exam Prep
School questions & homework
Free

This AI-powered tutoring app provides personalized, step-by-step assistance for a wide range of subjects including math, physics, and chemistry. It offers instant solutions to homework problems, targeted exam preparation, and in-depth subject exploration to help students learn more efficiently and build confidence.

Snap and solve homework problemsStep-by-step problem solvingPersonalized exam preparation
📚 Education
(3.1K)
free with in-app purchases
9
PhotoMath Solver AI: MathBox
PhotoMath Solver AI: MathBox
PhotoMath Solver AI: MathBox
Algebra Calculator AI Homework
Free

Instantly solve and learn any math problem by taking a photo. Get step-by-step solutions and clear explanations for algebra, calculus, and more. This AI-powered tutor helps students of all levels understand math concepts better and faster.

Photo math problem solverStep-by-step AI explanationsHandles typed and handwritten problems
📚 Education
(13K)
freemium
10
SnapMath - Photo Word Math
SnapMath - Photo Word Math
SnapMath - Photo Word Math
scan photo & solve math
Free

Instantly solve math problems by scanning them with your phone. Get detailed, step-by-step solutions in PDF format, complete with graphical representations. Ideal for homework help, from basic algebra to college-level calculus.

Scan math problems with cameraStep-by-step solutionsPDF export and sharing
📚 Education
(1.6K)
free with in-app purchases
11
车来了-精准实时公交
车来了-精准实时公交
车来了-精准实时公交
实时公交地铁查询，出行路线智能规划
Free

This app provides real-time public transit information for over 300 cities. It offers accurate bus arrival times, route planning, and helpful features like voice alerts for your stop, helping you avoid waiting and plan your commute efficiently.

Real-time bus arrival and location trackingVoice alerts for boarding and alightingInnovative arrival analysis service
🗺️ Navigation
(269)
free with in-app purchases
12
SnapCalc - Math Problem Solver
SnapCalc - Math Problem Solver
SnapCalc - Math Problem Solver
Camera Calculator for Homework
Free

Instantly solve math problems by taking a photo. Get step-by-step explanations for algebra, calculus, and more. Practice with quizzes and access educational resources.

Camera-based math problem solvingStep-by-step solution explanationsRecognizes handwritten problems
📚 Education
(42K)
free with in-app purchases
13
Pic Answer - AI Solver
Pic Answer - AI Solver
Pic Answer - AI Solver
Math Photo Solve your Homework
Free

This application uses AI to solve homework problems by analyzing photos. It offers instant solutions and interactive chat assistance across multiple academic subjects, aiming to deepen understanding of concepts.

AI-powered photo scanner for problem solvingInteractive AI chat for subject assistanceInstant accurate solutions
📚 Education
(3.3K)
free with in-app purchases
14
The Framery
The Framery
The Framery
PD Measure & Lens Scanner
Free

Measure your pupillary distance (PD) and scan your current glasses to get prescription details from home. This app uses advanced technology to provide key optical parameters needed for online eyewear shopping.

Measure PD quicklyScan glasses for Rx valuesExtract Sphere, Cylinder, and Axis
🏥 Medical
(11K)
free
15
MathAce: Solve Study Question
MathAce: Solve Study Question
MathAce: Solve Study Question
Math Solver & Study Tools
Free

This app helps students solve math problems across various subjects like algebra, geometry, and calculus. It offers instant photo problem solving, an advanced calculator, graphing tools, and step-by-step equation solutions to aid in understanding and mastering math concepts.

Instant photo problem solvingAdvanced calculator with unit conversionsEquation solver with step-by-step solutions
📊 Productivity
(8.8K)
free with in-app purchases
16
My Measures PRO + AR Measure
My Measures PRO + AR Measure
My Measures PRO + AR Measure
Store & Share Measurements
$11.99

Easily capture and annotate photos of objects with dimensions, angles, and text comments. Organize projects, share them as PDFs or images, and collaborate with others via cloud features. Ideal for professionals needing to document and share measurements accurately.

Annotate photos with dimensions, angles, and textOrganize projects in foldersShare projects as PDF or images
📊 Productivity
(3.3K)
free with in-app purchases
17
Calculator #
Calculator #
Calculator #
Scientific Calculator
Free

This multi-function calculator offers basic to advanced scientific and algebraic computations. It includes features like handwriting recognition, equation solvers, and 2D graphing, making it suitable for students and professionals. In-app purchases unlock advanced capabilities.

Math Photos SolverHandwriting RecognitionAI Math Problem Solver
🔧 Utilities
(36K)
free with in-app purchases
18
不背单词-真实语境学英语单词
不背单词-真实语境学英语单词
不背单词-真实语境学英语单词
百万原声例句记单词
Free

Learn English vocabulary with over 1.5 million native speaker example sentences. This app uses a science-based memory curve, root analysis, and authentic phrases to help you remember words effectively. It covers all learning stages and exam needs.

1.5 million+ native speaker example sentences50,000+ phrase collocations2,000+ root and affix lessons
📚 Education
(3.4K)
free with in-app purchases
19
SmartSolve: Tutor & Math Help
SmartSolve: Tutor & Math Help
SmartSolve: Tutor & Math Help
Scan & Solve Any Problem
Free

This AI-powered app offers instant solutions to academic and coding problems by scanning them. It also enhances language skills, rewrites text, and provides coding assistance and trivia challenges.

Scan and solve math problems with step-by-step explanationsInstant solutions for math equationsEnhance language skills with grammar hints and translation
📚 Education
(3.6K)
free with in-app purchases
20
Magnifying Glass - Flashlight
Magnifying Glass - Flashlight
Magnifying Glass - Flashlight
Magnifier & Strobe Light
Free
$9.99 | 100% OFF

Transform your phone into a versatile digital tool. Easily read small text with a powerful magnifier, illuminate dark spaces with a bright flashlight, and even use it as a makeup mirror. It also includes smart tools like a level and rangefinder.

Zoom and magnify textBuilt-in LED flashlightMakeup mirror functionality
🔧 Utilities
(6)
free with in-app purchases

FAQ about Four.nta

What are the best FOUR.NTA apps for iPhone?
Calculator₊ tops our FOUR.NTA apps ranking as of June 2026, with a 4.7-star average from 1.7M App Store ratings, and it's free to download.
Yes — 19 of the top FOUR.NTA apps we rank are free to download, including Calculator₊ and EduCalc Classic.
Calculator₊ shows ads and offers in-app purchases, according to its App Store listing as of June 2026.
We track 207+ FOUR.NTA apps on the iOS App Store as of June 2026, ranked by rating, recency, and analysis of real user reviews.
Calculator₊ offers several subscription plans, including monthly and half-yearly options, with prices ranging from $0.99 to $3.99. Many plans include free trial periods of 3 or 7 days.
The AI-powered Math Solver is designed to instantly solve math equations, quizzes, and word problems, including those captured via photo. While specific accuracy metrics are not provided, the feature aims to provide quick solutions.