Comparison

ClaroPDF Pro vs Colourful Semantics Sorting

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ClaroPDF Pro

This app transforms PDFs into accessible documents. It allows you to listen to text with synchronized highlighting, annotate PDFs with various tools, and convert image-based PDFs into searchable text. Manage and sync your files across devices for seamless study and productivity.

Highlights
  • Text-to-speech with synchronized highlighting
  • PDF annotation tools (highlight, underline, notes)
  • Image and PDF image to accessible text conversion
  • Background speech playback
  • Customizable readability settings
  • iCloud synchronization
Features
Read full description

ClaroPDF Pro is an accessible, reading and study PDF tool for all. Annotate, mark up, listen to and save PDF files which are then still fully compatible with other popular PDF apps. Have accessible text PDF files spoken back to you with human quality voice & synchronized highlighting. PDF image files or photographs of text can be converted to accessible, searchable PDF files using the Claro Cloud conversion service. + Speech, Productivity and Accessibility Alongside the full range of iOS system voices, ClaroPDF Pro lets you choose up to 4 high-quality voices for free, in the languages of your choice. A ‘Speak in Background’ option lets you listen to a PDF while viewing another app - great for proofreading PDF files while you’re working in other apps. The ‘Speak on tap’ and ‘Stop on tap’ options make speech easy to control. + ClaroPDF allows the background color of the PDF to be changed, and text color inverted, to enhance readability. ClaroPDF fully supports VoiceOver. + Annotations, Notes and Comments ClaroPDF includes a powerful Annotation toolbar that lets you add notes and other comments. These are fully interchangeable with most other popular PDF apps, so your ClaroPDF comments will still be there if you open the PDF on another device. Annotations created in another PDF app can also be viewed and edited. Annotation features include: highlight; underscore; strikeout; notes; free text (type straight into the PDF); free line draw; shapes (circle, square, line - with many options); images (you can even insert photos from your iPad camera or photo library into the PDF file); audio and video. + Photos and Image PDF to Text PDF Conversion You can convert photos and other images to fully accessible text PDF files that can be spoken, searched, copied and highlighted. As well as converting photos, you can also convert any PDF Image file into a fully accessible Text PDF file. Along with making these PDF files accessible and searchable, it will also compress them, reducing file size. 5000 pages and photos can be converted using the 5000 included credits. Further credit can be purchased in app. Photos and Image PDF to Text PDF Conversion in ClaroPDF uses the Claro Cloud conversion service and requires an internet connection. ***Minimum camera spec: 2MP*** + Managing PDF Files PDF files can be opened in ClaroPDF from all other apps, including Mail and Safari. All opened PDF files will be placed in the ClaroPDF Documents List for later viewing. You can also open files from Dropbox, Google Drive, or import files via iTunes. PDF files can be saved into ClaroPDF’s Documents, Dropbox or Google Drive, sent by email, or opened in other apps that support PDF files. The ClaroPDF Documents List is fully customisable, allowing you to organise your PDF files and folders. + Sync with iCloud You can sync ClaroPDF with your iCloud account. This lets you store and synchronize your PDF files and annotations across multiple devices. Sync with iCloud can also act as a document backup so you can keep your documents safe. + Save as PDF Extension The "Save as PDF" Extension lets you convert text and images to PDF files from Safari, Notes, Photos and other apps using the iOS "Share" feature. When converted, these new PDF files will appear in your documents list inside ClaroPDF. + Included Text to Speech Voices Download any 4 of our high quality text to speech voices. Once you have downloaded your free voices, other Nuance Expressive, Acapela and CereProc voices are available to purchase in-app. + Switch Accessibility ClaroPDF responds to switch or Bluetooth keyboard commands: 1 (~1) Start speech 2 (~2) Stop speech 3 (~3) Turn to previous page 4 (~4) Turn to next page + Fullscreen mode Allows the full document to be seen without toolbars in view. Ideal for smaller screens! Need help with ClaroPDF or have any suggestions? Please email support@clarosoftware.com

About

Colourful Semantics Sorting

Features
Read full description

Supercharge Sentence Skills with Colourful Semantics Sorting! Transform sentence learning into an exciting sorting game! Our Colourful Semantics Sorting activities make mastering sentence elements fun and interactive. Developed by a certified Speech-Language Therapist, these activities are perfect for speech therapy, classroom learning, or home practice, helping learners improve sentence recognition and structure through play. What is Colourful Semantics? It’s a proven approach to help learners master sentence construction and develop stronger writing skills in a way that's both fun and effective. Fast, Fun, and Engaging! Start sorting with ease - just select an activity and dive in! Drag the cards to the matching post box. Tailor Your Experience! Adjust the TTS voice, switch between American and British English, tweak activity lengths, and choose which semantic elements are shown to adjust the difficulty level. Get ready to level up sentence skills with Colourful Semantics Sorting—where learning meets fun in every drag and drop!

Screenshots

ClaroPDF Pro4 screens

Verdict

The call

The clearest difference is in-app purchases: Colourful Semantics Sorting at none against ClaroPDF Pro's 17. Colourful Semantics Sorting also leads on price ($8.99 vs $9.99). ClaroPDF Pro's advantage is update cadence (every 3 weeks vs every 2 months) and device support (3 vs 1). On ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

ClaroPDF Pro costs $9.99 and Colourful Semantics Sorting $8.99 up front. ClaroPDF Pro sells 17 one-off in-app purchases. Colourful Semantics Sorting asks for nothing beyond the download.

UpkeepUpdate frequency

ClaroPDF Pro ships an update every 3 weeks, Colourful Semantics Sorting every 2 months. The most recent releases landed on October 15, 2026 and September 26, 2026 respectively.

Scorecard5 real differences · 5 level
ClaroPDF Pro versus Colourful Semantics Sorting: the parameters behind the verdict, then further details
ParameterClaroPDF ProColourful Semantics Sorting
Price$9.99$8.99 — better
Rating4.2 (48 ratings) — better—
Positive reviews51.4% of reviews—
Number of ratings48 — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS13.0 — better15.0
Further details — not scored
Size147 MB260 MB
Age rating4+4+
DeveloperClaro Software LimitedTherapy Box Limited

In-app purchases

17 purchases

ClaroPDF Pro

One-time17
  • JessFree
  • HeatherFree
  • 50 Credits$0.99
Show 14 more
  • Jill$1.99
  • Heather$1.99
  • Micah$1.99
  • Rod$1.99
  • Will$1.99
  • Allison$1.99
  • Ava$1.99
  • Susan$1.99
  • Laura$1.99
  • Rachel$1.99
  • 200 Credits$3.99
  • 5000 Credits$3.99
  • Olivia$3.99
  • 500 Credits$8.99
None

Colourful Semantics Sorting

No in-app purchases

Questions

Is ClaroPDF Pro free?
ClaroPDF Pro costs $9.99, and also offers in-app purchases.
Is Colourful Semantics Sorting free?
Colourful Semantics Sorting costs $8.99, with no in-app purchases.
Do ClaroPDF Pro or Colourful Semantics Sorting have ads?
Neither ClaroPDF Pro nor Colourful Semantics Sorting shows ads.
Which is updated more often, ClaroPDF Pro or Colourful Semantics Sorting?
ClaroPDF Pro ships an update every 3 weeks, and Colourful Semantics Sorting every 2 months. Most recently, ClaroPDF Pro was updated on October 15, 2026 and Colourful Semantics Sorting on September 26, 2026.

Other comparisons