Comparison

Co vs Investigation Declaration

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

Investigation Declaration

Embark on a historical investigation to uncover how Enlightenment ideas influenced the Declaration of Independence. Travel across time and the Atlantic world, collecting evidence to restore corrupted files and understand the spread of concepts like natural rights and state sovereignty.

Highlights
  • Explore 10 Atlantic world locations
  • Track Natural Rights, State Sovereignty, or Social Contract
  • Mad-lib style evidence linking
  • Historical scenes with narrative
  • Spanish translation and English voiceover
  • Glossary and classroom resources
Features
Read full description

"An international crime of epic proportions has occurred. Members of a global crime ring, Baddies Against Rights & Freedom (B.A.R.F. for short), have hacked the most elite of institutions… the Bureau of Ideas! B.A.R.F. aims to destroy any and all files related to freedom, democracy, and rights. As Secret Agent 6, you will travel across time and the Atlantic world to investigate records that connect Enlightenment to the United States Declaration of Independence and beyond. Find how ideas have spread, track evidence of natural rights, state sovereignty, and the Social Contract, and restore the corrupted files. Game Features: - Multiple paths to completion: track Natural Rights, State Sovereignty, the Social Contract, or complete them all! - Explore 10 locations across the Atlantic world to collect evidence and connect. - Historical scenes enhanced by a narrative and rich material culture. - Mad-lib style activity links locations based on the evidence you collect along the way. For English Language Learners: This game offers a support tool, Spanish translation, English voiceover, and glossary. Teachers: Visit the iCivics """"teach"""" page to check out classroom resources for Investigation Declaration! Learning Objectives: - Track a set of Enlightenment ideas that inspired and followed the Declaration of Independence, particularly between 1750 and 1850. - Draw ideological cause-and-effect connections between historical events. - Identify and define the concepts of natural rights, the Social Contract, and state sovereignty. - Understand the roles of time and geography in the spread of ideas. - Describe methods by which ideas were transmitted during this time period: trade, written communications, migration, and print. - Become familiar with ideas, people, locations, and events that influenced declarations of rights and freedoms during this time period. Made in partnership with the Colonial Williamsburg Foundation "

Screenshots

Co4 screens
Investigation Declaration4 screens

Verdict

The call

The clearest difference is rating: Investigation Declaration at 3.0 against Co's 2.6. Co's advantage is ratings volume (17 vs 2) and iOS requirement (10.0 vs 12.0). On price, update cadence, 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

Investigation Declaration holds the better App Store score, 3.0 against 2.6. That said, the two scores are not equally well evidenced: Co has 17 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Co ships an update every 4 months, Investigation Declaration every 3 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 7 level
Co versus Investigation Declaration: the parameters behind the verdict, then further details
ParameterCoInvestigation Declaration
PriceFreeFree
Rating2.6 (17 ratings)3.0 (2 ratings) — better
Positive reviews8.3% of reviews—
Number of ratings17 — better2
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better12.0
Further details — not scored
Size45 MB351 MB
Age rating4+4+
DeveloperDon Johnston IncorporatediCivics, Inc.

In-app purchases

None

Co

No in-app purchases

None

Investigation Declaration

No in-app purchases

Questions

Is Co free?
Co is free to download, with no in-app purchases.
Is Investigation Declaration free?
Investigation Declaration is free to download, with no in-app purchases.
Which has better reviews, Co or Investigation Declaration?
Investigation Declaration is rated higher. Co averages 2.6 out of 5 from 17 ratings, while Investigation Declaration averages 3.0 from 2 ratings.
Do Co or Investigation Declaration have ads?
Neither Co nor Investigation Declaration shows ads.
Which is updated more often, Co or Investigation Declaration?
Co ships an update every 4 months, and Investigation Declaration every 3 months. Most recently, Co was updated on November 1, 2026 and Investigation Declaration on November 4, 2026.

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