Best Annotator Apps

Annotated by their authors

2.0(1 ratings)

FreeIn-App Purchases

Notator | Annotate Documents screenshot 1

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This app allows for detailed annotation of PDFs and images with various tools, including support for Apple Pencil. It offers flexible import options, high-quality rendering for large files, and intuitive page management. Upgrade to Pro for advanced export and editing capabilities.

Annotable: Annotation & Markup by 凌王

Image Annotation & Markup

Strong Contender

📷 Photo & Video

4.6😊(894 ratings)

FreeIn-App Purchases

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This app provides a comprehensive suite of tools for annotating and marking up images. It offers a wide range of customization options for common annotation elements and unique features like text highlighting on screenshots. The app supports various iOS system integrations for a seamless user experience.

What We Love

🚀 Game changer
🚀 Excellent—the built-in iOS markup features pale in comparison
👍 Easy to use
👍 Fantastic!
👍 Amazing App
👍 Nice lightweight image editor
👍 Fantastic!
👍 Easy simple to use
👍 Wonderful app - must have
👍 Great all-in-one app
👍 Use it all the time
👍 Top app
👍 Highly recommend this app!!
👍 Absolutely Amazing!!
👍 Really handy little app...
👍 The best image annotation tool on iOS
👍 high recommend
👍 Très bonne application!!
👍 Great annotation tool
👍 Best annotation app there is!
👍 Does what it says on the tin
👍 A must have
👍 Easy yet powerful
👍 Amazing !
👍 Best of breed App
👍 Simple and very functional
👍 A Really Good Apo
👍 Wow!
👍 Great little app
👍 Brilliant app
👍 Very useful app

Room to Improve

🐛 Blur broken ios26
🔒 Can't undo
💰 Paid app, free version is worthless
💰 Everything is locked behind a pay wall
💰 Extremely frustrating to use
💰 Too many features need $$
💰 Too expensive!!
💰 A little rich
💰 Pourquoi payer??
🐛 Can't cope with a pencil

Annotation Control by Williams Sound, LLC

Annotation Control

Worth Considering

🔧 Utilities

0.0(0 ratings)

Free

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Gloss: Annotated Reader

Annot8: Annotation & Markup

📚 Books

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Best Annotation & Markup Tool

Customizable text and shapesHighlighting and spotlight toolsFreehand drawing and handwriting

Easily add customizable text, shapes, and drawings to your photos. Highlight important areas, blur backgrounds, and edit images with tools like cropping and rotation. Share your annotated creations instantly across multiple platforms.

📷 Photo & Video

(11)

ezPDF Reader: PDF Reader, Annotator & Form Filler

by Unidocs Inc.

$1.99

This app allows users to view and interact with PDF documents, including multimedia playback and form filling. It offers robust annotation tools compatible with Adobe Acrobat and supports text reflow for comfortable reading on mobile devices.

Multimedia PDF playback (audio & video)Interactive PDF form fillingComprehensive annotation tools

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Annotate, Train and Use Models

ML Annotator

Image annotation for ML classifiersTeam collaboration for annotationApple Pencil support for iPad

This tool facilitates the annotation of images for machine learning tasks like object detection and classification. It supports team collaboration, Apple Pencil for precise drawing, and offers various data export formats. Users can also generate custom iPython notebooks to kickstart model creation.

This application enables machines to digitally sense and analyze smells using nanomaterial-based technology. It allows users to view, annotate, and recognize smell measurements in real-time, functioning as part of a developer kit.

Smell recognitionSmell digitalization and annotationSaving and loading measurements

🔧 Utilities

Markup image in an easy way

free

Annotate+ Markup image

Extensive annotation tools (lines, text, effects)Fast tool switching with swipe gestures29 collage formats

Easily mark up images with a wide array of tools like lines, text, and effects. Create collages, combine screenshots into long images, and manage photos with widgets. Share annotated images directly.

(116)

Lectra Notes: PDF Annotator

Handwriting, PDFs & Python

Read and mark up PDFsHighlight key passages and add notesOrganize documents with folders and tags

This app provides a private workspace for reading, annotating, and organizing PDF documents. It helps users understand dense texts faster with on-device intelligence for summaries and suggested tags. Designed for a calmer document workflow, it ensures your files remain private.

noter: EPUB reader & annotator

(7)

free

Read, markup & highlight books

Apple Pencil annotationHighlight and markup textAdd margin notes

This app allows users to read EPUB and PDF files, offering extensive annotation features with Apple Pencil support. Users can highlight, draw, and add margin notes, then export their annotations. It also supports Calibre integration and customizable reading themes.

📚 Books

Add unknown Pinyin and English

Chinese Annotator

$0.99

This app helps you learn Chinese by reading ePub books. It allows you to add Pinyin and English definitions directly to the text, and track your vocabulary knowledge. You can also export your learned words for flashcard review.

Import ePub filesAdd Pinyin and English definitionsTrack known words and characters

AnnotateUp - Image Annotation

(30)

free

Annotate image, edit photos

This tool simplifies image annotation for object detection tasks. It automatically handles annotation formatting and offers intuitive controls for managing bounding boxes and labels. Choose from multiple export formats to seamlessly integrate with various machine learning frameworks.

Automatic annotation formattingDelete bounding boxes by holdingRename labels and update all boxes

Cantonese Jyutping Annotator

paid

Auto Jyutping · 99% Accuracy

Instant Jyutping annotationNative Cantonese TTS playbackKaraoke-style character highlighting

Instantly convert Chinese text into accurate Cantonese Jyutping with smart disambiguation. Features native voice playback with karaoke highlighting, customizable typography, and professional export options. All processing is done on-device for offline use.

(0)

SignPDF - Quickly Annotate PDF

by Tektrify, Inc

Sign documents with your fingerFill out PDF formsAdd name, initial, and date

Easily sign and fill out PDF documents directly on your device without needing an account. Open PDFs from various cloud services, add your signature, text, and checkmarks, then share or save the completed document.

💼 Business

(105)

iMark · Image Annotation Tool

All-in-One Image Markup Tool

Diverse annotation tools (arrow, text, mosaic, etc.)Import from photo library, camera, and mapsCustomizable color schemes and history sessions

Enhance and annotate images with a comprehensive set of tools. Import from your photo library, camera, or maps, and customize your markups with various styles. Easily export and share your creations.

(381)

PdfTranslator-AI & Annotate

Translate PDF Offline & Notes

Piiico · Image Annotation

(0)

I have all the tools you need

Rich annotation tool libraryDiverse markup stylesInstant face detection and cover

Easily mark up and share your images to communicate ideas more clearly. Offers a wide range of annotation tools with customizable styles, including smart text highlighting and fun face covering options. Export and share your annotated images conveniently.

🔧 Utilities

(119)

Smart AI Notes & Layout Scan

Anote: Smart Annotations

AI-powered layout analysisSmart text and image recognitionSeamless digitization of physical documents

This AI-powered notebook transforms physical documents into structured digital notes. It automatically identifies and categorizes text, images, and equations, making studying and organizing information efficient and engaging.