Calk vs PeriodlyWise
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Calk compared with PeriodlyWise
| Detail | 
Calk | 
PeriodlyWise |
|---|
| What it does | The calorie counter you don't have to live in
| Privacy-first cycle tracking for period, ovulation, and fertility estimates
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| Stage | Startup
| Not given
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| Founded | 2026
| Not given
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| Based in | IL
| Not given
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| Pricing model | Freemium
| Free
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| Pricing | Core tracker free forever (food logging, targets, weight entry, weight trend). Annual subscription $49.99/year for daily advice and monthly reports (first month free).
| Not given
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| Key features | - Monthly Nutrition Report with meal analysis
- Weight trend chart
- Variety Map showing food diversity
- Offline food and weight logging
- No ads or tracking
- Calorie and macro targets
- Daily advice and recommendations
- No kitchen scale required
- Shareable seven-day Variety Map
| - Estimate next period date and period window
- Calculate ovulation timing and fertile window ranges
- Save period records to private account
- View cycle history and compare patterns
- Share results as image or text summary
- Print results or save as PDF
- Add calendar reminders for upcoming dates
- Install as progressive web app
- Multilingual support
- Track irregular cycles with history-based projections
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| What makes it different | - Food logging with a defined endpoint instead of permanent daily tracking
- Changes to familiar meals instead of restrictive diets
- Focus on meal composition over portion reduction
- Transparent data handling with no third-party tracking
| - Privacy-first design that doesn't track or invasively collect sensitive information
- Shows estimate ranges instead of false precision
- Optional account features—basic tools work without sign-up
- Clear medical disclaimers and educational focus, not medical device claims
- Installable as app without requiring app store download
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| Free plan | Not given
| Not given
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| Open source | Not given
| Not given
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| Platforms | Not given
| Not given
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| Public API | Not given
| Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 8 ● no change since last check | 1 ● no change since last check |
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| Trust Flow (Majestic) | 14 | 3 |
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| Citation Flow (Majestic) | 24 | 22 |
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| Referring domains (Majestic) | 31 | 6 |
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4 details filled in for both companies.
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