Comparison

Co vs KORG GEC5 Controller

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

KORG GEC5 Controller

This software provides a comprehensive system for group instruction in music, language, or technology labs. It offers flexible modes for lectures, individual practice with teacher eavesdropping, and collaborative group work, enhancing classroom efficiency and engagement.

Highlights
  • Multiple practice and instruction modes
  • Fully-digital stereo sound
  • Intuitive software user interface
  • Flexible audio routing
  • Open curriculum compatibility
  • Lecture, Practice, and Group modes
Read full description

GEC5 Lab System Controller The Korg Group Education Controller (GEC5) represents the most advanced system in group instruction technology. With an intuitive, easy-to-use software user interface, multiple practice and instruction modes, fully-digital stereo sound - the Korg GEC5 Lab System will take any music, language or technology lab to a new level of high efficiency and create a superior classroom experience. The advanced, yet easy-to-use audio routing in the GEC5 is compatible with any digital audio signal, so get creative and build a room with any combination of electronic instruments including digital pianos, guitars, synthesizers, and even MIDI-controlled software instruments. Want to do even more? Integrate computers with your lab and take learning to a new level of excitement and capability. Unlike other systems, the Korg GEC5 is completely open and allows you to use any curriculum that suits your classroom best. The sky is the limit! For over 20 years Korg has worked extensively with educators all over the world with overwhelming success in thousands of music, language and technology labs. This expertise in educational technology has led to the development of the Korg GEC5 Lab System - the most user-friendly, flexible and powerful lab control system available. Software Control Application MULTIPLE MODES MEAN FLEXIBILITY There are three main modes of GEC5 operation. Each of these can be selected within the software interface at the teacher’s station: Lecture Mode: Present material and instruction in a lecture format. All students hear the teacher’s microphone and instrument or computer allowing for a captive and quiet audience. - Tap the Student Instrument/Student Stations button and allow the students to play along. - Tap and hold to exclude a student from the lecture for independent work. - Double tap to bring a student into the lecture for comments or questions. Practice Mode: Practice mode is used when the students are working independently. Each student hears only his or her own instrument or computer. In Practice Mode, the teacher has the option of “eavesdropping” on the student and initiating 2 way communication with the student for individualized instruction. - Double-tap to eavesdrop, double-tap again to talk - Tap All Call to call attention to the group - Single tap to clear eavesdrop - Performance Mode allows the teacher to hear all of the students and their instruments at the same time while each student can only hear themselves, their instrument and the teacher’s audio. Group Mode: This mode is used when students are working together in groups (two or more student workstations in any conceivable configuration). Each student in a group can hear his or her own instrument as well as the instruments or computer and microphone of the other members of their group. - Tap and hold to select students to put in a group, then select New Group - Recall Auto Group Presets - Make your own custom presets for each class *This app must be used with the GEC5 hardware system available from an authorized Korg Dealer. http://www.korg.com/us/products/audio/gec5/index.php

Screenshots

Co4 screens

Verdict

The call

The clearest difference is rating: KORG GEC5 Controller at 5.0 against Co's 2.6. KORG GEC5 Controller also leads on review sentiment (25% vs 8%). Co's advantage is update cadence (every 4 months vs every 11 months) and ratings volume (17 vs 4). On price, ads, in-app purchases and monetization model 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

KORG GEC5 Controller holds the better App Store score, 5.0 against 2.6. Both are backed by a comparable volume of ratings — 17 and 4 respectively. Written reviews point the same way: 8% of Co's written reviews are positive against 25% of KORG GEC5 Controller's.

UpkeepUpdate frequency

Co ships an update every 4 months, KORG GEC5 Controller every 11 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard5 real differences · 5 level
Co versus KORG GEC5 Controller: the parameters behind the verdict, then further details
ParameterCoKORG GEC5 Controller
PriceFreeFree
Rating2.6 (17 ratings)5.0 (4 ratings) — better
Positive reviews8.3% of reviews25.0% of reviews — better
Number of ratings17 — better4
Update frequencyEvery 4 months — betterEvery 11 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS10.0 — better11.0
Further details — not scored
Size45 MB22 MB
Age rating4+4+
DeveloperDon Johnston IncorporatedKORG INC.

Customer experience

Co

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

KORG GEC5 Controller

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive25.0%
Neutral0.0%
Negative75.0%

In-app purchases

None

Co

No in-app purchases

None

KORG GEC5 Controller

No in-app purchases

Questions

Is Co free?
Co is free to download, with no in-app purchases.
Is KORG GEC5 Controller free?
KORG GEC5 Controller is free to download, with no in-app purchases.
Which has better reviews, Co or KORG GEC5 Controller?
KORG GEC5 Controller is rated higher. Co averages 2.6 out of 5 from 17 ratings, while KORG GEC5 Controller averages 5.0 from 4 ratings.
Do Co or KORG GEC5 Controller have ads?
Neither Co nor KORG GEC5 Controller shows ads.
Which is updated more often, Co or KORG GEC5 Controller?
Co ships an update every 4 months, and KORG GEC5 Controller every 11 months. Most recently, Co was updated on November 1, 2026 and KORG GEC5 Controller on November 2, 2026.

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