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Best Size App OS

212+ iOS apps curated and reviewed

4.1 avg rating
18 free apps
Updated May 2026

From beginner-friendly picks to power-user tools, our size app os list covers 212+ iPhone apps updated through May 2026. Compare ratings, prices, and screenshots in one place.

Top Picks for Size App OS

App Store Connect#2

App Store Connect by Apple Inc.

For App Developers
Strong Contender
🛠️ Developer Tools
4.7😐(14K ratings)
Free
#9in Developer Tools
App Store Connect screenshot 1
App Store Connect screenshot 2
App Store Connect screenshot 3
App Store Connect screenshot 4
App Store Connect screenshot 5

Manage your apps and submissions directly from your iPhone or iPad. Monitor sales, respond to reviews, manage testers, and generate marketing assets on the go. Receive important notifications about your app's performance and status.

What We Love

  • 👍 Convenient app for managing apps
  • 🚀 Quick response and easy to use
  • 📢 Helpful for responding to reviews
  • 🔍 Provides good overview of app performance

Room to Improve

  • 🐛 Crashes and bugs
  • 🕰️ Delayed data and analytics
  • 🔍 Limited functionality compared to website
TestFlight#3

TestFlight by Apple Inc.

Beta testing made simple
Worth Considering
🛠️ Developer Tools
4.7😊(787K ratings)
Free
#1in Developer Tools
TestFlight screenshot 1
TestFlight screenshot 2
TestFlight screenshot 3
TestFlight screenshot 4
TestFlight screenshot 5

Easily test pre-release versions of apps and App Clips. Provide feedback to developers before public launch. Receive invites via email or public link.

What We Love

  • 🚀 Easy to use
  • 👍 User-friendly interface
  • 🚀 Convenient for testing apps
  • 👍 Helpful for developers

Room to Improve

  • 🐛 Crashes and glitches
  • 🔒 Age restriction issues
  • 🐛 Inconsistent update notifications

More Size App OS apps to explore

4
Abody.ai
Abody.ai
Abody.ai
Body Measurement App
Free

This app uses your phone's camera to take precise body measurements and track changes over time. It helps you find the perfect clothing size for online shopping and understand your body's health metrics like BMR and TDEE.

AI-powered body measurementsClothing size recommendationsBody change tracking
💪 Health & Fitness
(221)
free
5
App lock - passcode Lock apps
App lock - passcode Lock apps
App lock - passcode Lock apps
Custom icons、hide apps & lock
Free

Secure your apps with custom passwords and personalized icons. This utility allows you to hide apps, change their appearance, and set up biometric unlocking for enhanced privacy and a unique device aesthetic.

Lock and hide appsCustomize app icons with photos or built-in libraryPersonalize app names
🔧 Utilities
(757)
free with in-app purchases
6
My Clothing Size | Vestofy
My Clothing Size | Vestofy
My Clothing Size | Vestofy
Your size for online shopping.
Free

Easily determine your clothing size for online shopping by measuring your best-fitting garment. Avoid guesswork and find clothes that fit perfectly with this AR measuring app. It's also useful for sellers to share garment dimensions with customers.

Accurate clothing size determinationMeasure best-fitting garmentsAR measuring technology
🌟 Lifestyle
(7)
free
7
Image Size - Resize Image
Image Size - Resize Image
Image Size - Resize Image
Photo resize, image resizer
$2.99

Quickly resize your photos with this intuitive tool. It allows for single or batch resizing, with options to maintain aspect ratio and set output quality. View original image dimensions before saving your modified files.

Resize photos in secondsBatch resizingLock/unlock aspect ratio
📷 Photo & Video
(35)
paid
8
Penometer
Penometer
Penometer
Track & Compare Your Size
Free

Measure and track your body size metrics over time. Compare your measurements to national and global averages, and gain insights with a built-in analysis tool. Your data is kept private and secure.

Measure length, width, and girthTrack changes over time with graphsCompare size to global and national averages
💪 Health & Fitness
(34)
freemium
9
Ring Sizer.
Ring Sizer.
Ring Sizer.
Get Your Ring Size Instantly
Free

Easily determine your correct ring size using your smartphone's camera. This app provides accurate measurements for online jewelry purchases or custom designs, eliminating the need for resizing.

Instant ring size determinationCamera-based precise measurementIntuitive and clear instructions
🔧 Utilities
(78)
freemium
10
LaunchBuddy: App Planner
LaunchBuddy: App Planner
LaunchBuddy: App Planner
Plan, Track & Ship your Apps
Free

This app helps indie developers plan, track, and ship their applications more efficiently. It allows users to capture ideas, manage project details, and organize release tasks in one centralized location to streamline the development process.

Capture app ideasTrack project statusPlan releases and updates
🛠️ Developer Tools
(106)
freemium
11
CoffeeOS
CoffeeOS
CoffeeOS
One App, All of Coffee
Free

This platform connects coffee growers, roasters, brewers, and enthusiasts. It offers tools for research, practice, and brewing, with AI-powered insights to refine coffee making. Collaborate and share with a global community.

Connects coffee growers, roasters, and brewersAI-powered insights for perfecting coffeeTools for research, practice, and brewing
🔧 Utilities
(7)
free
12
DBP Weight Scale
DBP Weight Scale
DBP Weight Scale
by DBP Solutions Limited
Free

Connect your Bluetooth weight scale to collect and store your weight data. This application integrates seamlessly with DBP solutions for comprehensive health tracking.

Bluetooth weight scale connectivityData collectionIntegration with DBP solutions
🏥 Medical
(1.6K)
free
13
App Icon Maker - Change Icon
App Icon Maker - Change Icon
App Icon Maker - Change Icon
Custom Home Screen Icons
Free

Easily create and install custom app icons for your device's home screen. Choose from thousands of templates, gradients, and text options to personalize your device's appearance with unique designs.

1-Click Easy App Icon Installer+1400 high resolution icon templates+100 beautiful gradients
🎨 Graphics & Design
(567)
free with in-app purchases
14
Pixel Resizer: Custom Metadata
Pixel Resizer: Custom Metadata
Pixel Resizer: Custom Metadata
Developer Screenshot Xcode App
$2.99

Easily resize images to any custom pixel dimensions, up to 4000x4000. This tool is ideal for developers needing specific screenshot sizes for app stores, or for social media posts. Save presets for quick, simultaneous exports without lag.

Custom pixel dimensions up to 4000x4000Unlock aspect ratio constraintsImport, resize, and export images
🛠️ Developer Tools
(14)
paid
15
Easyapp.ai - Mini Apps
Easyapp.ai - Mini Apps
Easyapp.ai - Mini Apps
Not Vibe Coding Real Mini Apps
Free

Effortlessly create professional mini apps and mobile apps using AI. Design, customize, and publish your digital presence across web, app stores, and mini app platforms in minutes. Track performance with built-in analytics.

AI-powered app generationIntuitive design interfaceInstant web publishing
📊 Productivity
(189)
free with in-app purchases
16
Locky: App Lock & Limit
Locky: App Lock & Limit
Locky: App Lock & Limit
Apps & Websites Limit, Blocker
Free

Secure your device with this app that offers robust protection for your sensitive applications. Choose from multiple locking methods, including PIN and Face ID, to prevent unauthorized access and safeguard your personal data. Enjoy peace of mind knowing your confidential information is protected.

App lockingPIN and Face ID protectionLimit app usage
🔧 Utilities
(68)
free with in-app purchases
17
Activity Tracker・FitnessView
Activity Tracker・FitnessView
Activity Tracker・FitnessView
Exercise・Workout・Step Counter
Free

Visualize your health and fitness data with a comprehensive dashboard and detailed statistics. Track daily goals, review past workouts, and export your progress. Offers customizable widgets and PDF reports for easy sharing.

Health & Fitness DashboardDetailed Health StatisticsWorkout Data Visualization
💪 Health & Fitness
(7.5K)
freemium
18
E-Weigh: Scale for Grams
E-Weigh: Scale for Grams
E-Weigh: Scale for Grams
Digital Phone Weight / Measure
Free

Transform your smartphone into a versatile measurement tool. Accurately estimate the weight and dimensions of objects using your camera with advanced AR and computer vision. Ideal for chefs, DIYers, shippers, and anyone needing quick, precise measurements.

Estimate object weight via photoCalculate length, width, height with AROn-screen digital ruler for precise length
🔧 Utilities
(71)
free with in-app purchases
19
Topo Maps+: Topographic Maps
Topo Maps+: Topographic Maps
Topo Maps+: Topographic Maps
Offline Maps & GPS Navigation
Free

Plan and execute backcountry adventures with offline topographic maps and GPS navigation. Features include route building, waypoints, land boundaries, and on-trail tools. Integrates with Apple Watch and CarPlay for seamless outdoor exploration.

Offline topographic mapsSmart route buildingWaypoints and proximity alerts
🗺️ Navigation
(9.2K)
freemium
20
App Update Access
App Update Access
App Update Access
Update All, System Tools
Free

This utility app helps you manage your iOS device by checking for app updates, providing system information, and performing security checks. It also offers guides on screen recording and touch visualization, along with quick access to app settings.

Check for app updatesView device and system infoPerform security checks (Jailbreak detection)
🔧 Utilities
(13)
ad-supported