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Best Resolution Converter Apps

203+ iOS apps curated and reviewed

4.6 avg rating
18 free apps
Updated May 2026

If you already know PDF Photos, this is the deeper bench. 203+ resolution converter apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of May 2026.

Top Picks for Resolution Converter

PDF Photos#1

PDF Photos by Sarrada Software Inc

Picture to PDF Converter
Editor's Choice
💼 Business
4.8😐(14K ratings)
FreeAdsIn-App Purchases
PDF Photos screenshot 1
PDF Photos screenshot 2
PDF Photos screenshot 3
PDF Photos screenshot 4
PDF Photos screenshot 5
PDF Photos screenshot 6

Convert photos to PDF easily with customizable layouts, resizing options, and document branding using our intuitive application. Share PDFs via email, print, or save on cloud storage. Experience the convenience of our JPG to PDF Converter and Photo Grid App.

What We Love

  • 🚀 Easy to use
  • 👍 Convenient for converting photos to PDFs
  • 🚀 Quick and efficient
  • 👍 User-friendly interface

Room to Improve

  • 🔒 Requires paid subscription to access full features
  • 🐛 Crashes or freezes on some devices
  • 🔒 Deceptive about free version capabilities
Conversion Calculator Plus#2

Conversion Calculator Plus by Yan Liong Tan

Unit Converter
Strong Contender
📊 Productivity
4.7😞(15K ratings)
FreeAdsIn-App Purchases
Conversion Calculator Plus screenshot 1
Conversion Calculator Plus screenshot 2
Conversion Calculator Plus screenshot 3
Conversion Calculator Plus screenshot 4
Conversion Calculator Plus screenshot 5
Conversion Calculator Plus screenshot 6

"Explore the ultimate Unit Converter tool with Conversion Calculator Plus – your go-to Swiss army knife for effortless unit conversions. Simplify complex calculations and streamline your work effortlessly."

What We Love

  • 🚀 Great app
  • 👍 Easy to use
  • 🚀 Comprehensive conversions
  • 👍 Intuitive interface

Room to Improve

  • 🐛 Consent required for tracking
  • 🐛 Update problems
  • 🐛 Currency not updating
Unit Converter - Pro Units App#3

Unit Converter - Pro Units App by Tue Nguyen Minh

Convert Any Unit
Worth Considering
🔍 Reference
4.6😞(16K ratings)
FreeIn-App Purchases
Unit Converter - Pro Units App screenshot 1
Unit Converter - Pro Units App screenshot 2
Unit Converter - Pro Units App screenshot 3

A versatile conversion calculator app that effortlessly converts various units like length, weight, volume, and more. Simplify your conversions with ease by downloading the app now!

What We Love

  • 👍 Easy to use
  • 🚀 Simple design
  • 👍 Covers many units
  • 👍 User-friendly layout

Room to Improve

  • 🔒 Limited functionality without paying
  • 🔒 Most common units locked behind paywall
  • 🐛 Restore purchase not working

More Resolution Converter apps to explore

4
Convertible: Unit Converter
Convertible: Unit Converter
Convertible: Unit Converter
Currency and Unit Converter
Free

This application is a comprehensive unit converter that allows users to easily convert between various units of measurement, including standard and non-standard units, across multiple categories such as length, mass, area, and more. With its elegant interface, customizable themes, and unique features like fraction input and output, it helps users visualize and understand complex conversions in a fun and educational way, try it now!

🔧 Utilities
(97)
5
Image Converter - PNG&PDF&JPEG
Image Converter - PNG&PDF&JPEG
Image Converter - PNG&PDF&JPEG
Convert to JPG PNG & SVG File
Free

This image conversion app supports various formats, including JPG, PNG, and HEIC, and allows for batch conversion, adjustable compression, and essential editing tools. With a clean interface and simple workflow, it enables fast and efficient image processing, allowing users to easily convert and customize their images.

🌟 Lifestyle
(26)
6
Units Plus Converter
Units Plus Converter
Units Plus Converter
Convert Any Unit & Currency
$19.99

Units Plus Converter is a versatile application capable of converting any unit of measurement into another. From length and weight to temperature and currency, this app provides a comprehensive tool for all your conversion needs. Download now for hassle-free unit conversions.

🔧 Utilities
(8.3K)
7
Video Converter - Compressor
Video Converter - Compressor
Video Converter - Compressor
Trim Merge Reverse Thumbnail
Free

This app quickly converts videos to various formats, allowing for easy editing and sharing. With its simple interface, users can convert, compress, trim, merge, and extract audio from videos in just a few seconds, and then save or share their files in their favorite apps.

🔧 Utilities
(15)
8
Photo & Image Converter
Photo & Image Converter
Photo & Image Converter
Resizer & convert files bulk
Free

Capture life's moments with ease using this innovative application. Organize, edit, and share your photos effortlessly. Download now to experience a new way of preserving memories.

📊 Productivity
(491)
9
Fancy Units Converter
Fancy Units Converter
Fancy Units Converter
Currency and Unit Converter
Free

"Easily convert currencies and units with this user-friendly app for quick and hassle-free calculations. Simplify your conversions now!"

🔧 Utilities
(1.6K)
10
Converter-Universal Conversion
Converter-Universal Conversion
Converter-Universal Conversion
by Trelleborg Sealing Solutions
Free

"An all-in-one conversion tool for engineers and scientists, featuring over 300 units across 32 categories, currency conversion, timezone conversion, and more. Switch between themes, create favorite lists, and enjoy a seamless user experience. Available in multiple languages – download now!"

🔧 Utilities
(897)
11
AllConvert Kit - Image & Video
AllConvert Kit - Image & Video
AllConvert Kit - Image & Video
Convert to PNG, GIF, PDF+more
Free

A versatile app for converting files to various formats, including images, PDFs, videos, audios, and documents. Easily switch between different formats with just a few clicks. Try it now for seamless file conversions.

🔧 Utilities
(1.3K)
12
Resolutioner
Resolutioner
Resolutioner
Calculate or scale resolutions
Free
🛠️ Developer Tools
(349)
13
Video Converter and Compressor
Video Converter and Compressor
Video Converter and Compressor
Any Format Batch 4K Merger
Free

Convert and compress videos effortlessly with this fast app supporting multiple formats like MP4, MKV, and AVI. Easily merge 4K videos in batches. Try it now for quick and efficient video conversions.

📷 Photo & Video
(2K)
14
Measures Unit Converter
Measures Unit Converter
Measures Unit Converter
Unit Converter
$1.99
$2.99 | 33% OFF

Easily convert between hundreds of units and currencies with our intuitive app! Featuring a user-friendly interface, daily updated exchange rates, and a wide range of conversion categories, this app simplifies your daily tasks, travel, and leisure activities. Try it now for fast and efficient conversions!

🔧 Utilities
(20)
15
Unit Converter HD.
Unit Converter HD.
Unit Converter HD.
30 categories, 700+ units
Free

Discover a powerful unit converter app with 30 categories and over 700 units of measure. Make conversions easily across various categories and save time with this user-friendly tool.

🔧 Utilities
(642)
16
The Document Converter
The Document Converter
The Document Converter
Convert to PDF, DOCX, JPG, etc
Free

Easily convert files to various document formats with just a few clicks. Select your input file, choose the output format (DOCX, PDF, JPG, etc.), and convert in seconds. Save, share, or open your converted files in different apps instantly.

🔧 Utilities
(5.9K)
17
Percentage Resolution Tool
Percentage Resolution Tool
Percentage Resolution Tool
by David Hobbs
Free

This tool helps you convert pixel values to and from percentages based on a target screen size, making it easy to work with coordinates and sizes for various devices and orientations. Try it out to simplify your design and development process.

📊 Productivity
(2)
18
Currency & Unit Converter #
Currency & Unit Converter #
Currency & Unit Converter #
Scientific Unit Converter
Free

Get real-time currency exchange rates, set up rate alerts, and track multiple currencies with ease. Stay updated on global currency trends and make informed decisions. Download now to manage your finances more effectively!

🔧 Utilities
(217)
19
Image Size
Image Size
Image Size
Resize your photo! Resizer App
Free

Resize your photos easily with this app! Customize image sizes in pixels, millimeters, centimeters, or inches and conveniently share the final results. Get precise resizing options and editing tools in just a few simple steps. Unlock special features with in-app purchases for an enhanced experience.

📷 Photo & Video
(30K)
20
Image Converter: JPEG PDF HEIC
Image Converter: JPEG PDF HEIC
Image Converter: JPEG PDF HEIC
Convert to JPG PNG & SVG File
Free

Easily convert images to different formats like JPG, PNG, PDF, and HEIC with our efficient and versatile image converter app. Streamline your image conversion needs in just a few clicks! Try it now for seamless format transitions.

📊 Productivity
(9K)

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