Legal
Support
Last updated: 25 October 2026 · Version 1.0
Chalkwise is a maths notebook with a chalkboard. If something does not work or an answer looks wrong, we want to hear it.
Contact us
E-mail info@stichtingleaf.nl and include your device, iOS version, app version and what you wrote or scanned. We usually reply within two working days.
Common questions
- The answer is wrong — tap the answer to see the steps; if they are wrong too, e-mail us a screenshot.
- The scan does not read my sum — write larger, keep one sum per line and finish with =.
- Chalkwise+ — subscriptions are managed by Apple: Settings → your name → Subscriptions.
- My notebooks are gone — notebooks live on your device; deleting the app deletes them.
Languages
The app is available in English and Dutch. This website is available in nine languages.
Publisher
Chalkwise is published by Stichting Le@f, Ampèrestraat 9, 1976 BE Velsen, the Netherlands · KVK 34140586 · VAT NL815590921B01.