Postscriptum vs Mac Ninja
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Postscriptum compared with Mac Ninja
| Detail | 
Postscriptum | 
Mac Ninja |
|---|
| What it does | A private AI journal that turns your daily reflections into a memoir
| Not given
|
|---|
| Stage | MVP
| Not given
|
|---|
| Founded | Not given
| Not given
|
|---|
| Based in | Not given
| SE
|
|---|
| Pricing model | Free
| Freemium
|
|---|
| Pricing | $0 during open beta; paid plans to come later
| Yearly: $9.99/year (cancel anytime); Lifetime: $24.99 one-time payment. Both plans include every feature and work on up to 3 Macs.
|
|---|
| Key features | - Nightly check-in with AI-generated questions
- Adaptive second question based on previous entries
- Unsealed entries that cannot be edited
- AI memoir generation in literary prose
- Weekly pattern digest
- AI-generated insights about themes and patterns
- Full archive with streaks and backstory
| - Unload idle browser tabs in Chrome, Safari, Brave, Edge, Arc and other browsers
- Calm background CPU hogs without quitting them
- Clean up tabs left behind by AI agents
- Offload unused apps to save disk space
- Live dashboard showing memory and CPU stats
- Memory autopilot for automatic tab sleeping
- Works on up to 3 Macs per license
- Silent auto-updates
- Minimal resource usage
- No admin password required for normal use
|
|---|
| What makes it different | - The second question intelligently adapts based on what you previously wrote
- Entries are permanently sealed and cannot be edited
- Automatically composes your journal into a literary memoir
| - Never closes your apps or tabs, only unloads idle tabs that reload instantly when clicked
- Uses only standard macOS and browser features, no system changes or kernel extensions
- Automatically cleans up tabs abandoned by AI agents after 8 hours
- No tracking, no analytics, no account required
|
|---|
| Free plan | Not given
| Not given
|
|---|
| Open source | Not given
| Not given
|
|---|
| Platforms | Not given
| Not given
|
|---|
| Public API | Not given
| Not given
|
|---|
| Community votes | 0 | 0 |
|---|
| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | Not checked yet ● no change since last check |
|---|
| Trust Flow (Majestic) | 0 | 0 |
|---|
| Citation Flow (Majestic) | 12 | 7 |
|---|
| Referring domains (Majestic) | 1 | 2 |
|---|
4 details filled in for both companies.
More alternatives to Postscriptum More alternatives to Mac Ninja