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Best One Be Maximum Apps

250+ iOS apps curated and reviewed

4.3 avg rating
20 free apps
Updated August 2026

WhatsApp Messenger is the household name in one be maximum, but it's far from the only option. We track 250+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top One Be Maximum Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1WhatsApp MessengerWhatsApp MessengerFree4.7★ (18M)YesYesAug 2026
2Google MapsGoogle MapsFree4.7★ (7.3M)YesYesAug 2026
3EF1 E6B Flight ComputerEF1 E6B Flight ComputerFree3.6★ (5)YesYesAug 2026
4Sixteenths: Construction CalcSixteenths: Construction CalcFree5.0★ (1)NoYesAug 2026
5Height and Weight ToolHeight and Weight ToolFree3.0★ (1)NoNoMay 2026
6Clinometer+ Slope & Roof PitchClinometer+ Slope & Roof PitchFree—YesNoAug 2026
7Mike Holt's Electrical ToolboxMike Holt's Electrical ToolboxFree4.6★ (197)NoNoAug 2026
8Construction Calculator A1Construction Calculator A1Free4.7★ (23)YesYesAug 2026

Top Picks for One Be Maximum

WhatsApp Messenger#1

WhatsApp Messenger by WhatsApp Inc.

Simple. Reliable. Private.
Editor's Choice
🌐 Social Networking
4.7😊(18M ratings)
FreeAdsIn-App Purchases
#2in Social Networking
WhatsApp Messenger screenshot 1
WhatsApp Messenger screenshot 2
WhatsApp Messenger screenshot 3
WhatsApp Messenger screenshot 4
WhatsApp Messenger screenshot 5

Connect with friends and family globally through private messaging and high-quality calls. Share moments, documents, and stay in touch across devices, even on slow connections. Your conversations are secured with end-to-end encryption.

What We Love

  • 💬 Great communication tool
  • 🌍 Connects people globally
  • 🔒 Secure and private messaging
  • 📱 Versatile features (calls, video, groups)

Room to Improve

  • 🐛 Bugs and glitches (freezing, crashing, notification issues)
  • 🔒 Privacy concerns with data sharing
  • 🙈 Lack of customization and control (status, groups)
Google Maps#2

Google Maps by Google LLC

Places, navigation & traffic
Strong Contender
🗺️ Navigation
4.7😐(7.3M ratings)
FreeAdsIn-App Purchases
#1in Navigation
Google Maps screenshot 1
Google Maps screenshot 2
Google Maps screenshot 3
Google Maps screenshot 4
Google Maps screenshot 5
Google Maps screenshot 6

Navigate your world with real-time traffic, turn-by-turn directions for driving, walking, cycling, and public transport. Discover millions of businesses and places with photos and reviews. Plan trips with Street View, Immersive View, and offline maps.

What We Love

  • 🚀 Accurate navigation
  • 👍 Helpful for travel and exploration
  • 💡 Useful for delivery drivers
  • 👍 Reliable traffic information

Room to Improve

  • 🐛 Buggy and unreliable directions
  • 🔄 Constant rerouting without user consent
  • 🗺️ Inaccurate or outdated maps
EF1 E6B Flight Computer#3

EF1 E6B Flight Computer by EntireFlight LLC

E6B Calculator & C/X Planner
Worth Considering
🗺️ Navigation
3.6(5 ratings)
FreeAdsIn-App Purchases
EF1 E6B Flight Computer screenshot 1
EF1 E6B Flight Computer screenshot 2
EF1 E6B Flight Computer screenshot 3
EF1 E6B Flight Computer screenshot 4
EF1 E6B Flight Computer screenshot 5
EF1 E6B Flight Computer screenshot 6

This app provides a comprehensive electronic flight computer for pilots, offering fast, offline calculations for wind, airspeed, fuel, and navigation. It includes multi-leg route planning, printable navigation logs, and weight and balance calculations.

More One Be Maximum apps to explore

4
Sixteenths: Construction Calc
Sixteenths: Construction Calc
Sixteenths: Construction Calc
Feet Inch Fraction Calculator
Free

This app simplifies complex construction calculations by handling feet, inches, and fractions accurately. It offers specialized solvers for common jobsite tasks like stairs, roof pitch, and concrete, with results saved automatically for easy recall. It's designed for offline use and provides a one-time purchase for full access.

Exact fraction math for feet and inchesTen jobsite solvers (stairs, roof pitch, etc.)Automatic result saving and naming
🔧 Utilities
(1)
free with in-app purchases
5
Height and Weight Tool
Height and Weight Tool
Height and Weight Tool
Army Height/Weight Calculator
Free

This utility helps individuals determine if their height and weight meet specific military standards. It operates offline and does not require an internet connection for use. Note that certain height ranges for males are excluded.

Offline functionalityArmy height/weight compliance checkAR 600-9 standards
🔧 Utilities
(1)
free
6
Clinometer+ Slope & Roof Pitch
Clinometer+ Slope & Roof Pitch
Clinometer+ Slope & Roof Pitch
Slope · Roof Pitch · Tilt
Free
🔧 Utilities
(0)
7
Mike Holt's Electrical Toolbox
Mike Holt's Electrical Toolbox
Mike Holt's Electrical Toolbox
Electrical Power Calculator
Free

This app provides essential calculations for electricians, inspectors, contractors, and engineers. It helps determine conductor sizing, circuit protection, race sizing, and grounding conductor sizes for various electrical equipment and services.

Conductor sizingVoltage drop limitationsCircuit protection sizing
🔧 Utilities
(197)
free
8
Construction Calculator A1
Construction Calculator A1
Construction Calculator A1
Construction calculator app
Free

This app provides specialized calculators for construction professionals, including concrete, rebar, and area/volume calculations. It offers material quantity estimation, unit conversion, and professional features like BOQ export and project organization. Designed for contractors, builders, and engineers on job sites worldwide.

Concrete material quantity calculationRebar bending schedule and weight calculationFeet-inch arithmetic without decimal conversion
📊 Productivity
(23)
ad-supported
9
Electrical Toolkit by HCP
Electrical Toolkit by HCP
Electrical Toolkit by HCP
Conduit + load calcs for pros
Free

This comprehensive mobile toolkit provides electricians and professionals with essential calculations, NEC-compliant tools, and field utilities. It offers features for conduit bending, fill calculations, load analysis, and various electrical calculators, all designed for speed and clarity.

Conduit bending calculationsNEC-compliant conduit fillResidential load calculations
🔧 Utilities
(68)
free
10
Mechanical Engineering Toolkit
Mechanical Engineering Toolkit
Mechanical Engineering Toolkit
Engineering Equations,Formulas
Free

This utility app provides a comprehensive collection of engineering equations and formulas for students and professionals. Easily perform calculations by selecting a formula and inputting variables, with detailed instructions and reference material included.

Engineering equations and formulasMechanics of Material calculationsTheory of Elasticity formulas
🔧 Utilities
(64)
ad-supported
11
Southwire® Voltage Drop Calc
Southwire® Voltage Drop Calc
Southwire® Voltage Drop Calc
Southwire Calculator
Free

Calculate the appropriate wire size for electrical circuits. This tool helps determine wire size based on voltage drop and current carrying capacity, ensuring compliance with NEC ampacity limits.

Determine wire size for voltage dropCalculate voltage drop for conductor runsLimit wire size by voltage drop
🔧 Utilities
(1.5K)
free
12
去狮城-出国招聘找工作求职平台
去狮城-出国招聘找工作求职平台
去狮城-出国招聘找工作求职平台
海外求职找工作打工高薪职位劳务派遣
Free
🌟 Lifestyle
(0)
13
Bubble Level - Simple
Bubble Level - Simple
Bubble Level - Simple
Spirit & Angle Finder
Free

This tool helps you determine if objects are straight and level. It displays angles on your phone and can use AR for precise measurements on walls and paintings. Ideal for home tasks like hanging pictures or ensuring shelves are flat.

AR laser for wallsAngle display during rotationPortrait and landscape orientation
🔧 Utilities
(211)
free
14
Bubble Level ( Water level )
Bubble Level ( Water level )
Bubble Level ( Water level )
by EONSOFT
Free

This utility app functions as a digital spirit level. It helps users determine horizontal and vertical alignment for various tasks, such as hanging frames or installing TVs. The app provides precise measurements for circular, X-axis, and Y-axis tilts.

Digital spirit levelHorizontal and vertical alignmentCircular tilt measurement
🔧 Utilities
(225)
ad-supported
15
GAF QuickMeasure
GAF QuickMeasure
GAF QuickMeasure
Fast & Accurate Roof Reports
Free

Generate comprehensive roof measurement reports quickly and accurately. Ideal for single-family homes with reports in under an hour, and commercial/multifamily properties within 24 hours. Reports include detailed measurements of roof area, pitch, and various components.

Fast roof reportsAccurate measurementsRoof area calculation
💼 Business
(930)
paid
16
McCalc Fusion Calculator
McCalc Fusion Calculator
McCalc Fusion Calculator
HDPE/PP Pressure Calculator
Free

This app calculates the correct fusion pressure for HDPE and Polypropylene pipe jobs. It simplifies the process by selecting your fusion machine and entering pipe details to determine the recommended theoretical gauge pressure.

Select McElroy fusion machinesChoose from nine international standardsEnter pipe size in multiple units
💼 Business
(18)
free
17
Electrician's Sidekick
Electrician's Sidekick
Electrician's Sidekick
by IDEAL INDUSTRIES, INC
Free

This free tool consolidates essential electrical calculations and reference guides into a single app. It offers precise tools for conduit bending, wire sizing, voltage drop, and conduit fill, designed to enhance fieldwork efficiency and accuracy for professionals. The app functions offline, ensuring constant access to critical information.

Conduit bending calculatorWire sizing and voltage drop calculatorConduit fill calculator
📊 Productivity
(16)
free
18
Gravel Calculator Plus
Gravel Calculator Plus
Gravel Calculator Plus
by Inch Calculator
Free

Easily estimate the quantity of various landscaping and hardscaping materials like gravel, stone, and sand. Get precise measurements in tons, cubic yards, or cubic meters for your projects.

Estimate gravel, stone, rock, sand, and topsoilCalculate material needed for landscapingCalculate material needed for hardscape projects
🔧 Utilities
(1.7K)
ad-supported
19
Miller Fall Clearance Calculator
Miller Fall Clearance Calculator
Miller Fall Clearance Calculator
by Honeywell International, Inc.
Free

This utility app helps safety professionals calculate critical fall clearance distances for various fall arrest systems. It accurately determines the required clearance for shock-absorbing lanyards and self-retracting lifelines, including swing fall calculations for SRLs.

Calculate fall clearance distanceShock absorbing lanyard calculationsSelf-retracting lifeline calculations
🔧 Utilities
(1)
free
20
Master Electrician Ref. Lite
Master Electrician Ref. Lite
Master Electrician Ref. Lite
A handbook for electricians
Free

This electronic pocket reference guide provides essential information for electrical professionals. It offers calculations, code tables, and detailed sections on motors, ampacities, grounding, and more, all accessible on your mobile device.

Motor and wiring informationAmpacity tablesConduit fill and grounding sizes
📊 Productivity
(2.4K)
paid

FAQ about One Be Maximum

What are the best one be maximum apps for iPhone?
WhatsApp Messenger tops our one be maximum apps ranking as of August 2026, with a 4.7-star average from 18M App Store ratings, and it's free to download.
Yes — 20 of the top one be maximum apps we rank are free to download, including WhatsApp Messenger and Google Maps.
WhatsApp Messenger shows ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 250+ one be maximum apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
This app is a free messaging and calling application that allows users to connect with friends and family worldwide. It offers private messaging, high-quality voice and video calls, and the ability to share various types of content.
Key features include end-to-end encrypted private messaging and calls, group chats and calls with up to 32 people, cross-device connectivity (mobile, tablet, desktop), location sharing, and Status updates that disappear after 24 hours.