Check the actual terms
Before uploading, find out where the audio is stored, how long it remains available, and whether you can delete it. Review file size, duration, and export limits. If the workflow still needs a provider API key or paid processing, include that in the real cost.
Registration versus a native workflow
Echo does not require an account to use the app, but current cloud transcription needs your own OpenAI or Grok API key and an internet connection. The key is stored in macOS Keychain, and audio goes directly to the selected provider. That is a different trade-off: fewer Echo account steps, while API costs and provider terms remain visible to the user.
For a short trial, compare free audio-to-text transcription. For regular Mac work, see the dictation app guide and audio transcription on Mac.
Simplicity is not the same as privacy
An online tool without registration may still receive and temporarily store the recording. Read the processing terms before uploading interviews, meetings, or customer calls. For sensitive content, decide in advance which provider and data path are acceptable.
Conclusion
Audio-to-text transcription without registration can be useful, but compare the whole workflow: limits, storage, API requirements, quality, and deletion. A missing sign-up form is only one part of the decision.