

Also, it is getting a number of features which won't come to the classic OneNote 2016 version. Microsoft recommends switching to the OneNote Store app because of better reliability, performance, and battery life. We’ll continue to offer support, bug fixes, and security updates for OneNote 2016 for the duration of the Office 2016 support lifecycle, which runs through October 2020 for mainstream support and October 2025 for extended support. If you currently use OneNote 2016, you won’t notice any changes when you update to Office 2019. OneNote 2016 is optionally available for anyone with Office 365 or Office 2019, but it will no longer be installed by default. According to Microsoft, the app will continue receive updates and fixes till October 2025.

Users who prefer the classic app should keep the OneNote 2016 app.
