Comparison

OrbitNote vs Co

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

Head to head
About

OrbitNote

This tool allows users to read, annotate, and listen to PDF documents. It converts image-based PDFs to accessible text and offers features like speech playback, highlighting, and iCloud sync for seamless document management across devices.

Highlights
  • Annotate PDFs with highlights, underscores, and notes
  • Convert image PDFs to searchable text
  • Listen to PDFs with human-quality voice playback
  • Change background and text colors for readability
  • Sync documents and annotations with iCloud
  • Import/export PDFs from cloud storage and other apps
Features
Read full description

OrbitNote 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 & synchronised highlighting. PDF image files or photographs of text can be converted to accessible, searchable PDF files and read in the app. + Speech, Productivity and Accessibility Alongside the full range of iOS system voices, OrbitNote comes with a range of high-quality voices in different languages. 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. + OrbitNote allows the background colour of the PDF to be changed, and text colour inverted, to enhance readability. OrbitNote fully supports VoiceOver. + Annotations, Notes and Comments OrbitNote 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 OrbitNote 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. Further credit can be purchased in app. Photos and Image PDF to Text PDF Conversion in OrbitNote requires an internet connection. + Managing PDF Files PDF files can be opened in OrbitNote from all other apps, including Mail and Safari. All opened PDF files will be placed in the OrbitNote Documents List for later viewing. You can also open files from Google Drive, OneDrive, or import directly from your device. PDF files can be saved into OrbitNote Documents, OneDrive or Google Drive, sent by email, or opened in other apps that support PDF files. + Sync with iCloud You can sync ClaroPDF with your iCloud account. This lets you store and synchronise 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. + Switch Accessibility OrbitNote 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!

About

Co

This app provides advanced word prediction and spelling support for students. It offers grammar-smart suggestions and access to millions of topic-specific dictionaries to aid in writing. Built-in text-to-speech functionality helps users review their work.

Highlights
  • Grammar-smart word prediction
  • Millions of topic-specific dictionaries
  • Flexspell™ technology for spelling errors
  • Built-in text-to-speech
  • Personalized vocabulary and settings
Features
Read full description

Co:Writer® Universal app and third-party keyboard gives students easy access to word prediction on iPad, iPad Pro, iPhone, and iPod Touch. Students simply sign in to their Co:Writer Universal accounts to write with their personal settings and vocabulary. ABOUT CO:WRITER UNIVERSAL This version is for schools with a Co:Writer Universal license only. Users without a Co:Writer Universal license must purchase the Co:Writer app. HOW DOES CO:WRITER WORK? As letters are typed, Co:Writer predicts the intended word with a selection of word suggestions using powerful grammar-smart word prediction. These suggestions can be read aloud with a swipe. Selecting the intended word places it into the writing document. For feedback while writing (and after writing) built-in text to speech can be used to read letters, words, sentences, and the entire document. 4+ MILLION TOPIC-SPECIFIC DICTIONARIES Co:Writer has access to a main prediction dictionary (that includes core words) and Topic Dictionaries (that includes topic specific words). Co:Writer can access over 4 million topic-specific dictionaries which are activated based on the writing task. A small sampling of the variety of topic dictionaries: - America's Cup - Apple II - Compare and Contrast - Dinosaurs - Grumpy Cat - History of the Peloponnesian War - Mahatma Gandhi - My Dog - Pig Latin - Rolls-Royce Silver Ghost - SpongeBob SquarePants - Tommy (album) - Wonders of the World SPELLING SUPPORT Co:Writer handles the widest range of spelling mistakes through its Flexspell™technology including phonetic spelling and inventive spelling errors (letter omissions, word ending omissions, letter reversals, etc). Examples of how Co:Writer aides with phonetic and/or inventive spelling: Before Co:Writer The blk jargon flu over the bra lfnt. R u hpy to ce me? I no hw to nor the fone. After Co:Writer The black dragon flew over the gray elephant. Are you happy to see me? I know how to answer the phone. GRAMMAR SUPPORT Co:Writer bases its prediction off of proper grammar, and uses its understanding of grammar to accurately predict words within the framework of valid sentence structures. Examples of how Co:Writer aides with grammar: Dogs are furry. (noun, verb, adj.) - When you typed d-o, you get plural noun choices Three very mangy dogs ran down the street. (adj., adv., adj., noun, verb… etc.) - After typing three, very, mangy, you get plural noun choices, then you get plural verb tenses. OTHER FEATURES - Built-in Text to Speech - Export

Screenshots

OrbitNote4 screens
Co4 screens

Verdict

The call

The clearest difference is rating: OrbitNote at 4.7 against Co's 2.6. OrbitNote also leads on review sentiment (50% vs 8%) and update cadence (monthly vs every 4 months). Co's advantage is in-app purchases (none vs 10) and iOS requirement (10.0 vs 15.5). On price, ads and device support 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

Both are free to download. OrbitNote sells 10 one-off in-app purchases. Co asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OrbitNote holds the better App Store score, 4.7 against 2.6. Both are backed by a comparable volume of ratings — 60 and 17 respectively. Written reviews point the same way: 50% of OrbitNote's written reviews are positive against 8% of Co's.

UpkeepUpdate frequency

OrbitNote ships an update monthly, Co every 4 months. Both last shipped on November 1, 2026.

Scorecard7 real differences · 3 level
OrbitNote versus Co: the parameters behind the verdict, then further details
ParameterOrbitNoteCo
PriceFreeFree
Rating4.7 (60 ratings) — better2.6 (17 ratings)
Positive reviews50.0% of reviews — better8.3% of reviews
Number of ratings60 — better17
Update frequencyMonthly — betterEvery 4 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.510.0 — better
Further details — not scored
Size252 MB45 MB
Age rating4+4+
DeveloperEverway Opco Ltd.Don Johnston Incorporated

Customer experience

OrbitNote

All ratings60 ratings
Positive91.7%
Neutral3.3%
Negative5.0%
Written reviews24 reviews
Positive50.0%
Neutral8.3%
Negative41.7%

Co

All ratings17 ratings
Positive29.4%
Neutral23.5%
Negative47.1%
Written reviews12 reviews
Positive8.3%
Neutral16.7%
Negative75.0%

In-app purchases

10 purchases

OrbitNote

One-time10
  • Krzysztof$1.99
  • Joaquim$1.99
  • 5000 Credits$3.99
Show 7 more
  • Elise$3.99
  • Valentin$3.99
  • Elias$3.99
  • Emilie$3.99
  • Filip$3.99
  • Freja$3.99
  • Unlock ClaroPDF Pro$9.99
None

Co

No in-app purchases

Questions

Is OrbitNote free?
OrbitNote is free to download, with in-app purchases available.
Is Co free?
Co is free to download, with no in-app purchases.
Which has better reviews, OrbitNote or Co?
OrbitNote is rated higher. OrbitNote averages 4.7 out of 5 from 60 ratings, while Co averages 2.6 from 17 ratings.
Do OrbitNote or Co have ads?
Neither OrbitNote nor Co shows ads.
Which is updated more often, OrbitNote or Co?
OrbitNote ships an update monthly, and Co every 4 months. Most recently, OrbitNote was updated on November 1, 2026 and Co on November 1, 2026.

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