Comparison

KeyHub vs Correctbook App

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

Head to head
About

KeyHub

Features
Read full description

Do you use KeyHub? With this app you'll never have to manually enter a 2FA code again. Simply connect the app using the regular 2FA-feature in your KeyHub-account and enable push-messages. When KeyHub requires you to enter your 2-factor-authentication, a push message will notify you. You can directly use this push-message to authenticate (after passing the touch-id or passcode check). If you weren't the person to initialise the authentication, the push-message can be used to immediately lock your account to prevent others to access it. That's all it takes!

About

Correctbook App

Features
Read full description

Correctbook; the erasable notebook that will last forever, here but also in developing areas. With the purchase of each Correctbook, we provide children in developing areas with the same erasable writing material. Available in all kinds of sizes: from pocket to A4. With the Correctbook Scan App you can digitize, organise and share your notes. Write endlessly in your Correctbook and erase the things you don't need anymore. Store important notes? Scan and save them in the notebook app. You can even create useful folders to keep a good overview. Share the scans with Dropbox or WhatsApp for example. The Correctbook App gives you a modern writing experience. The ideal combination of analog writing and digital organising. The functionalities of the app are the following: Scanner: - Automatic document detection Editor: - Manually cropping - Different filters - Rotate scans - Give names to scans - Place scan in a specific project Gallery: - Organise and create different projects - Share files through WhatsApp, Gmail, Outlook and many more - Move files to other folders - Summary of all scans - Delete files or projects

Screenshots

KeyHub3 screens
Correctbook App4 screens

Verdict

The call

The clearest difference is update cadence: KeyHub at every 3 months against Correctbook App's every 9 months. KeyHub also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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

UpkeepUpdate frequency

KeyHub ships an update every 3 months, Correctbook App every 9 months. The most recent releases landed on September 14, 2026 and September 11, 2026 respectively.

Scorecard3 real differences ยท 3 level
KeyHub versus Correctbook App: the parameters behind the verdict, then further details
ParameterKeyHubCorrectbook App
PriceFreeFree
Update frequencyEvery 3 months โ€” betterEvery 9 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod โ€” betteriPhone
Requires iOS13.0 โ€” better16.0
Further details โ€” not scored
Size7 MB30 MB
Age rating4+4+
DeveloperTopicus Onderwijs B.V.Correctbook

In-app purchases

None

KeyHub

No in-app purchases

None

Correctbook App

No in-app purchases

Questions

Is KeyHub free?
KeyHub is free to download, with no in-app purchases.
Is Correctbook App free?
Correctbook App is free to download, with no in-app purchases.
Do KeyHub or Correctbook App have ads?
Neither KeyHub nor Correctbook App shows ads.
Which is updated more often, KeyHub or Correctbook App?
KeyHub ships an update every 3 months, and Correctbook App every 9 months. Most recently, KeyHub was updated on September 14, 2026 and Correctbook App on September 11, 2026.

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