When comparing Momentum vs Amplenote, the Slant community recommends Momentum for most people. In the question“What are the best cross-platform task apps?” Momentum is ranked 34th while Amplenote is ranked 55th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Specifically designed for GTD
Pro Automated Next Steps
Next steps have a separate view. Tasks can be updated sequentially or parallel.
Pro Projects and Tasks can be endlessly nested
You can nest multiple projects with tasks, there is no limit.
Pro Has an offline mode
No permanent internet connection needed.
Pro Cross-platform
Web-based, progressive-web-app (PWA).
Pro Realtime synch
Data instantly updates on all devices.
Pro Clean design
Lots of space helps focus on the tasks.
Pro Notes encrypted at rest on servers
See here.
Pro Long-term minded
Company has not raised venture capital.
Pro "Idea Execution Funnel" methodology
Schema follows sensible flow from capture to revision to prioritize to schedule.
Pro Community-driven
Team maintains a voting board at https://amplenote.featureupvote.com that drives development roadmap, ensuring calibration between note enthusiasts and the product.
Pro Publish and share notes
Publish notes to the web (with configurable URLs) or share notes with collaborators.
Pro Offline-first
Fully functional offline mode.
Pro Omniplatform
Can be installed on macOS, Linux, Windows (via PWA), iOS and Android.
Pro Task/calendar syncing (Google Calendar & Outlook)
Any task with a date/time assigned to it will be exported to calendars optionally connected. Completing the task removes it from calendar.
Pro Multi-level tagging (personal/hobbies/bike-rides) to keep organized
Any note can be assigned as many deeply nested tags as desired. The tag hierarchy can be navigated, filtered on tasks or notes.
Pro Backlinking & networked note references
Amplenote supports the same [[]] syntax popular in Roam to create a link to an existing note. Every linked note has a tab with all the references into that note.
Pro Automatically sorted task list
Every task can be marked as "Urgent" or "Important," along with the time it's due. This makes it possible for the software to automatically sort your todo list in a way that makes sense, and save you time of deciding what to work on first every day.
Cons
Con Beta interface is confusing for first-timers
The interface is very opinionated (this is a good thing). But it is not obvious how to map user's own GTD variant onto the one the author has in mind. Maybe after it is in production, there will be better on-boarding.
Con No native apps
Con In Beta (development)
Con Not end-to-end encrypted
See here.