Co vs WhizRead
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Grammar-smart word prediction
- Millions of topic-specific dictionaries
- Flexspell™ technology for spelling errors
- Built-in text-to-speech
- Personalized vocabulary and settings
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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
WhizRead
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The WhizRead app for iPad is a reading comprehension app that helps children become confident readers. The App helps English as a second language (ESL) students and English language learners who want to master the English language and children that have learning difficulties or learn differently. The app provides interactive, multi-sensory tools that help improve their reading comprehension skills. Readers can interact with the app to hear how words are pronounced, read definitions and examples, listen to related sounds, and see images – all in one place. FEATURES FOR STUDENTS AND ENGLISH LANGUAGE LEARNERS With WhizRead, you can quickly and easily: - Choose what to read: Enjoy a personalized reading experience that’s right for you by choosing from a selection of engaging reading passages organized by subject and grade level and custom content from your parents and teachers. - Look it up: With just a tap, read definitions and examples, or choose to hear them aloud. - Hear it out loud: Hear the pronunciation of a word, meaning, phrase or even have an entire passage read out loud. - See it in action: Visualizing is a powerful way to understand something. Just tap a word or phrase to check out an image. - Take a quiz: Make sure you truly understand what you read by taking a short quiz after reading a passage. FEATURES FOR PARENTS, TEACHERS AND GUARDIANS/TUTORS Get all the same great features as students, plus you can also: - Create custom content or reading passage: Easily add content to the WhizRead app right from your iPad. Optionally upload content from your email or external storage repositories like Box, Dropbox, Google Drive, and Microsoft OneDrive. Finally, create a quiz for your passage. - Make your content interactive: Upload your custom content or reading passage and we’ll add all the rich, interactive features to it within minutes. Then, review, edit, publish, and share your interactive content. - Create a reading network: Connect with your children, create profiles for your children and manage your connections, invite your children in a secure way and share reading passages with your children FEATURES FOR TEACHERS Get all the same great features as students, plus you can also: - Create custom content. Easily add content to the WhizRead app right from your iPad. - Make your content interactive. Give us your content and we’ll add all the rich, interactive features to it within minutes. Then, review, edit, publish, and share your interactive content with your students. - Create a reading network. WhizRead makes it easy to invite students and parents, manage connections, and more. TESTIMONIALS – “I like that everything’s in one place: I can ask the app to read for me, I can see images and I can also hear audio. I don't need to look words up in a dictionary, or search for images.” – A fourth-grade student – “This is a great app even for established readers because they can learn new words and phrases along the way and improve their reading skills.” – A fourth-grade teacher – “My daughter reads really well, but I feel she doesn't fully understand what she reads. This app can help her with that.” – Parent of a third-grader – “WhizRead is helpful for my son, who is more of a visual and auditory learner.” – Parent of a fifth-grader – “This is a great tool for my students from other countries. When I try to explain a word or phrase, I can immediately show them a picture instead of trying to explain it with words.” – A first-grade teacher ABOUT US https://www.whizread.com/about-us/ CONTACT US Please email your questions, feedback, and suggestions to: info@whizread.com. We’ll get back to you as soon as possible. TERMS OF USE https://www.whizread.com/terms-of-use/ PRIVACY POLICY https://www.whizread.com/privacy-policy/
Screenshots
Verdict
The clearest difference is update cadence: WhizRead at every 2 weeks against Co's every 4 months. Co's advantage is device support (3 vs 1) and iOS requirement (10.0 vs 12.0). On price, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Co ships an update every 4 months, WhizRead every 2 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | Co | WhizRead |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (17 ratings) — better | — |
| Positive reviews | 8.3% of reviews | — |
| Number of ratings | 17 — better | — |
| Update frequency | Every 4 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 10.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 45 MB | 93 MB |
| Age rating | 4+ | 4+ |
| Developer | Don Johnston Incorporated | Vizread LLC |
In-app purchases
Co
No in-app purchases
WhizRead
No in-app purchases









