Project and task management decision
Memtime
A technically competent developer can build a useful, privacy-first automatic tracker that records activity and exports to a few project tools, but reproducing Memtime’s full polish, broad integrations catalogue, phone-call tracking and enterprise features would be a multi-week effort and unlikely to beat the hosted product on time-to-value.
Visit website↗Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need — the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship.
What a replacement has to do
- Continuously detect active window/tab/file → record timestamped activity metadata locally → present an editable timeline UI to create time entries → map/assign entries to projects/tasks → export/sync entries to project software
What it still won’t have
- Polished, cross-platform native UX and long-term stability
- The vendor-maintained catalogue of 100+ integrations and one-click syncs
- Phone-call tracking and enterprise SSO/SCIM features
- Priority support, onboarding, and same-day implementation
- Proven privacy guarantee and legal/operational history
What remains hard
- Product polish and ongoing maintenance
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 1 seat.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a cross-platform desktop automatic time tracker using Electron + Node (or Tauri + Rust) with a local encrypted SQLite store. Implement: 1) native foreground-window detection and metadata capture for Windows/macOS/Linux (use node-active-window or platform APIs), 2) a background service that aggregates events into time intervals and allows excluding activities, 3) an editable timeline UI with zoom and click-and-drag time entry creation, 4) project/task mapping and an exporter implementing at least one project software API (e.g., Asana or Jira), and 5) settings for privacy (local-only storage, erase data) and licensing. Out of scope: phone-call tracking, enterprise SSO/SCIM, 100+ integrations, mobile apps. Include error handling, data migration tests, unit tests for core logic, and end-to-end test(s) for timeline->export flow.
How we checked
How the score was reached
- Partly verdict base52
- An open-source build was found+5
- 5 cited sources+3
- Price verified on pricing page+3
- 3/3 assessment runs agreed+4
- Evidence score67
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time — so the same evidence always produces the same number.
How scoring works →Cited sources · 5
Every page the run actually retrieved.
- official productMemtime official product
- official pricingMemtime pricing
- official docsHow Memtime works
- open sourceActivityWatch/activitywatch
- open sourceJerryZLiu/Dayflow
Integrity checks
What held up, and what did not.
