Ratio M8: Coffee Calculator
Brew ratio and stopwatch
Free · Designed for iPad. Not verified for macOS.
Set a ratio and enter the amount of coffee or water. Ratio M8 calculates the other. Includes a stopwatch, a brew estimate and a dark theme.
Ratio M8 calculates coffee and water amounts from a brew ratio.
Set the ratio, then enter the amount of coffee or water. The app calculates the other one.
Works with any brewing method: pour-over, French press, AeroPress, espresso. Ratios go from 1:1 to 1:30.
Features:
• Ratio, coffee and water scales, in grams
• Brew estimate: the expected amount of coffee in the cup after the grounds absorb some of the water
• Stopwatch for timing brewing phases
• Light, dark and automatic themes
• Haptic feedback, which can be turned off
• The screen stays on while the app is open
• No data is collected
Tips:
• Tap the left or right side of a scale to change the value by 0.1.
• Touch and hold either side to change it by 1.
Ratings & Reviews
• Use the app in your language: 37 languages are now supported
• New app icon
• Small design tweaks and bug fixes
The developer, Adventurous2 Ltd, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Adventurous2 Oy
- Size
- 22.6 MB
- Category
- Food & Drink
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Adventurous2 Ltd