Comparison

Hidden Grid vs ClaroPDF Pro

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

Head to head
About

Hidden Grid

This app encourages screen exploration and teaches basic touch and drag skills with single or multi-touch options. It features colored shapes, patterns, and sound effects that respond to touch, making it ideal for young children and those with visual impairments.

Highlights
  • Screen exploration
  • Touch and drag skills
  • Single and multi-touch
  • Sound effects
  • Ideal for low vision
  • Hand-eye coordination
Features
Read full description

This activity has been designed to encourage exploration of the whole screen and teach basic touch and drag skills including options for single or multitouch. Drag your finger around the screen to reveal coloured shapes and patterns, with different sound effects that change pitch. When you lift your finger the tiles will fade. Black background, different sound effects and bright colours make this a very motivating activity for children with visual impairments as well as being great fun for the very young. The great feedback makes this an ideal cause and effect activity that can help develop hand eye co-ordination. Key Features: • Black background and bright colours ideal for low vision. • Single touch to encourage finger isolation and pointing - may be easier for some users to understand. • Multi-touch for maximum feedback. • Simple interaction and fun for very young children.

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

Screenshots

ClaroPDF Pro4 screens

Verdict

The call

The clearest difference is rating: Hidden Grid at 5.0 against ClaroPDF Pro's 4.2. Hidden Grid also leads on in-app purchases (none vs 17) and price ($3.99 vs $9.99). ClaroPDF Pro's advantage is update cadence (every 3 weeks vs every 14 months) and ratings volume (48 vs 1). On review sentiment and 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

Hidden Grid costs $3.99 and ClaroPDF Pro $9.99 up front. ClaroPDF Pro sells 17 one-off in-app purchases. Hidden Grid asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Hidden Grid holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: ClaroPDF Pro has 48 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 50% of Hidden Grid's written reviews are positive against 51% of ClaroPDF Pro's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Hidden Grid ships an update every 14 months, ClaroPDF Pro every 3 weeks. The most recent releases landed on October 21, 2026 and November 1, 2026 respectively.

Scorecard8 real differences · 2 level
Hidden Grid versus ClaroPDF Pro: the parameters behind the verdict, then further details
ParameterHidden GridClaroPDF Pro
Price$3.99 — better$9.99
Rating5.0 (1 ratings) — better4.2 (48 ratings)
Positive reviews50.0% of reviews51.4% of reviews — better
Number of ratings148 — better
Update frequencyEvery 14 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPadiPhone, iPad, iPod — better
Requires iOS6.0 — better13.0
Further details — not scored
Size23 MB147 MB
Age rating4+4+
DeveloperInclusive Technology LtdClaro Software Limited

Customer experience

Hidden Grid

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

ClaroPDF Pro

All ratings48 ratings
Positive77.1%
Neutral8.3%
Negative14.6%
Written reviews72 reviews
Positive51.4%
Neutral20.8%
Negative27.8%

In-app purchases

None

Hidden Grid

No 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

Questions

Is Hidden Grid free?
Hidden Grid costs $3.99, with no in-app purchases.
Is ClaroPDF Pro free?
ClaroPDF Pro costs $9.99, and also offers in-app purchases.
Which has better reviews, Hidden Grid or ClaroPDF Pro?
Hidden Grid is rated higher. Hidden Grid averages 5.0 out of 5 from 1 ratings, while ClaroPDF Pro averages 4.2 from 48 ratings.
Do Hidden Grid or ClaroPDF Pro have ads?
Neither Hidden Grid nor ClaroPDF Pro shows ads.
Which is updated more often, Hidden Grid or ClaroPDF Pro?
Hidden Grid ships an update every 14 months, and ClaroPDF Pro every 3 weeks. Most recently, Hidden Grid was updated on October 21, 2026 and ClaroPDF Pro on November 1, 2026.

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