DOSE - Coffee Grind Analysis
Just a Napkin. Measure.
Only for iPhone
Free
iPhone
A napkin is all you need. Photograph your ground coffee to measure the particle size, analyze the distribution, and record every result.
DOSE analyzes your coffee grind size from a single photo. Even a kitchen towel or napkin works perfectly. Measure your grind at home or at the café in seconds.
■ Measuring is simple
• Spread the grounds
Scatter your ground coffee evenly over a sheet of paper, a napkin, or a kitchen towel.
• Find good light
Natural light or bright indoor lighting is all you need. Just avoid harsh shadows.
• Set distance and angle
Follow the on-screen guide: hold the camera about 18–24 cm away and parallel to the surface.
• Capture
Center the grounds in the frame and take one shot. That's it.
■ What you'll learn
• Particle distribution
See D10 (small) · D50 (median) · D90 (large), mean, fines ratio, uniformity, and more — alongside a distribution histogram.
• Brew-method guidance
Get advice on grinding finer or coarser for espresso, pour-over, French press, and other methods.
• AI Barista insights (on supported devices, iOS 26+)
Reads your results and suggests how to dial in your next cup.
• Save and share
Save your analysis card as an image and share it.
■ What's coming
• Compare your history
Line up your saved measurements to track how grind size shifts with each grinder setting — and how consistent it stays.
■ Made for
• Home brewers who want more consistent extractions
• Anyone dialing in a new grinder by the numbers
• People who want to tell espresso and filter grinds apart precisely
• Baristas who want to check grind uniformity and fines firsthand
Taste the difference in every cup — backed by data.
Ratings & Reviews
The developer, SeungHo Choi, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SeungHo Choi
- Size
- 13.4 MB
- Category
- Food & Drink
- Compatibility
Requires iOS 18.2 or later.
- iPhone
Requires iOS 18.2 or later.
• iPhone 6S
• iPhone 6S Plus
• iPhone SE (1st generation)
• iPhone 7
• iPhone 7 Plus
• iPhone 8
• iPhone 8 Plus
• iPhone X
• iPhone XS
• iPhone XS Max
• iPhone XR
• iPhone 11
• iPhone 11 Pro
• iPhone 11 Pro Max
• iPhone SE (2nd generation)
• iPhone 12 mini
• iPhone 12
• iPhone 12 Pro
• iPhone 12 Pro Max
• iPhone 13 Pro
• iPhone 13 Pro Max
• iPhone 13 mini
• iPhone 13
• iPhone SE (3rd generation)
• iPhone 14
• iPhone 14 Plus
• iPhone 14 Pro
• iPhone 14 Pro Max
• iPhone 15
• iPhone 15 Plus
• iPhone 15 Pro
• iPhone 15 Pro Max
• iPhone 16
• iPhone 16 Plus
• iPhone 16 Pro
• iPhone 16 Pro Max
• iPhone 16e
• iPhone 17 Pro
• iPhone 17 Pro Max
• iPhone 17
• iPhone Air
• iPhone 17e
- iPhone
- Languages
English and 10 more
- English, Danish, German, Japanese, Korean, Norwegian Bokmål, Portuguese, Simplified Chinese, Spanish, Swedish, Traditional Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026 DOSE