The rules
Are you allowed to record a conversation?
In the Netherlands you may record a conversation you take part in yourself, even without announcing it. When you process the conversation for work, the GDPR asks for openness towards the participants. Recording a conversation you're not part of is a criminal offence.
What does the law say?
Two layers. The first: you may record a conversation you're part of (Dutch Criminal Code, Article 139a); no announcement is required for the recording itself. The second: when you process the conversation for work, the GDPR asks for openness. Saying it out loud at the start is enough; written consent isn't needed. That applies around the table and in an online meeting.
What you may not do: record a conversation you're not part of. Leaving a microphone in a meeting room and walking out is a criminal offence. The situations and the exceptions are set out on can you record a meeting.
A practical tip: open every conversation with "I'm recording this, so we don't have to write up the report ourselves. All right?" Most people are perfectly happy with it.
What changes once you use an app?
If an app processes the recording, you're processing the participants' personal data. The GDPR then applies: Article 6 for the legal basis, Article 28 for the processor. You need a data processing agreement with the provider; without one, you're the one liable if something goes wrong. What it should contain is on data processing agreement. At Notuly it's available on Team and above (see pricing).
Two things remain your responsibility, whichever app you choose: you say you're recording, and you check the report before you share it. Notuly is a clever app, not a person.
Which rules apply in each sector?
On top of the GDPR, each sector adds its own standards: for government the BIO and the Dutch Open Government Act, in healthcare the Dutch NEN 7510 standard, and for legal and financial professionals, professional confidentiality. Below is what that means for your conversations.