Comparison

Co vs StartSOLE

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

Head to head
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

About

StartSOLE

This app facilitates inquiry-based learning in classrooms by providing a framework for collaborative research and presentation. It offers thousands of questions aligned to state standards, lesson planning tools, and a community for educators to connect and share resources.

Highlights
  • Thousands of big questions aligned to state standards
  • Integrated lesson plans
  • Facilitation and reflection tools
  • Global educator community
  • Continuing education units
  • Printable resources
Features
Read full description

The StartSOLE app gives you everything you need to bring inquiry based learning into your classroom. In the app you will find thousands of questions aligned to state standards, integrated lesson plans, tools for facilitating and reflecting in your class, and the opportunity to connect with a global community of educators. What's SOLE? A SOLE takes place in three parts: asking a big question, collaborating to research in groups, and then each group presenting their findings. By design SOLE requires only one internet enabled device per group and takes about 45 minutes to an hour, perfectly suited to be completed in a single class period. SOLEs focus on the process of learning and prepares learners for the future by infusing 21st century skills like critical thinking, collaboration, and communication. This concept was pioneered by Dr. Sugata Mitra, winner of the 2013 TED prize for his ‘Hole in the Wall’ Experiment. StartSOLE is designed to make this concept easy for teachers to implement anywhere, anytime. What does this app do? • Big Questions - Thousands of big questions aligned to state standards are available for your next SOLE, or you can submit your own big question to share with the community. • Lesson Planning - Create a Charlotte Danielson-aligned lesson plan in minutes, delivered to your inbox • Facilitation Tool - An easy timer and guided observation tool allows you to record key moments during your SOLE as they happen • Guided Reflection - A brief guided reflection designed to improve your practice and provide support if needed • Certification - Receive free continuing education units from Cleveland State University for your work with SOLE • Tutorials - Guides & tips from other teachers, along with an introduction to the research frameworks behind SOLE. • News feed - view SOLE sessions from around the world and connect with other SOLE educators • Resources - Dozens of printable resources from other teachers available to use with your students: rubrics, worksheets, posters and more!

Screenshots

Co4 screens
StartSOLE4 screens

Verdict

The call

The clearest difference is review sentiment: StartSOLE at 100% against Co's 8%. StartSOLE also leads on rating (5.0 vs 2.6) and update cadence (fortnightly vs every 4 months). On price, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

StartSOLE holds the better App Store score, 5.0 against 2.6. Both are backed by a comparable volume of ratings — 17 and 6 respectively. Written reviews point the same way: 8% of Co's written reviews are positive against 100% of StartSOLE's.

UpkeepUpdate frequency

Co ships an update every 4 months, StartSOLE fortnightly. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard3 real differences · 7 level
Co versus StartSOLE: the parameters behind the verdict, then further details
ParameterCoStartSOLE
PriceFreeFree
Rating2.6 (17 ratings)5.0 (6 ratings) — better
Positive reviews8.3% of reviews100.0% of reviews — better
Number of ratings17 — better6
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.09.0 — better
Further details — not scored
Size45 MB68 MB
Age rating4+4+
DeveloperDon Johnston IncorporatedLudiVita OG

Customer experience

Co

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

StartSOLE

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Co

No in-app purchases

None

StartSOLE

No in-app purchases

Questions

Is Co free?
Co is free to download, with no in-app purchases.
Is StartSOLE free?
StartSOLE is free to download, with no in-app purchases.
Which has better reviews, Co or StartSOLE?
StartSOLE is rated higher. Co averages 2.6 out of 5 from 17 ratings, while StartSOLE averages 5.0 from 6 ratings.
Do Co or StartSOLE have ads?
Neither Co nor StartSOLE shows ads.
Which is updated more often, Co or StartSOLE?
Co ships an update every 4 months, and StartSOLE fortnightly. Most recently, Co was updated on November 1, 2026 and StartSOLE on November 2, 2026.

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