Brewmaster vs GrindBook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Brewmaster
This app logs your coffee brewing process, visualizing data in real-time with a connected scale. It helps you understand extraction, ratios, and share your brewing moments.
- Log brewing process, methods, notes, and flavors
- Real-time visualized brewing charts
- Monitor extraction amount and duration
- Coffee ratio converter
- Share brewing print cards
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Introducing “Brewmaster” Log your coffee brewing moment with Brewmaster. Using the acaia scale with the Brewmaster to create beautiful and informative visualized coffee brewing data which helps you to know your brewing better. A coffee log that does a live recording of your coffee brewing process, using acaia’s precise weighing technology, when you brew your coffee on the acaia coffee scale, whether it’s pourover or espresso, you can easily monitor the amount and the duration of coffee extraction. Features: Log-a-brew: Log your brewing process, methods, notes, and coffee flavors, brew better coffee with the acaia coffee scale. Real-time Visualize Brewing Print : improve coffee brewing with the real-time flow charts that reflects your pouring speed, flow rate, learn the way of coffee extraction and brew a mind-blowing cup of coffee with great flavor. And… Coffee Ratio Converter: Easy calculation of water to bean, or bean to water ratio. Celebrate The Moment: Share your brewing print cards with friends, remember the great times and great tastes.
GrindBook
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GrindBook is an app for remembering the coffee you bought, and reminding you which ones to buy again and which ones to avoid. Do you want to take detailed notes about brew temperature and duration? Do you want to log every cup? Then GrindBook is not for you. GrindBook is not about perfecting your coffee consumption or joining the Quantified Self. GrindBook is for remembering your beans. That is all. It tries to do its thing and get out of your way, and out of your mind. GrindBook thinks coffee should be enjoyed, and takes coffee seriously enough not to optimize it. GrindBook does not want your data. What is on your device stays on your device. Syncing, if enabled, happens through the Apple account already on your device. You can always export your data as Markdown files, so your beans are free to go elsewhere. GrindBook is a simple app. GrindBook is free. You can leave a tip if you enjoy the app and want to help keep the developer fully caffeinated. Tips do not unlock any features or new functionality. You will get a thank-you note though.
Screenshots
Verdict
The clearest difference is in-app purchases: Brewmaster at none against GrindBook's 3. Brewmaster also leads on iOS requirement (16.6 vs 18.0). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. GrindBook sells 3 one-off in-app purchases. Brewmaster asks for nothing beyond the download.
Brewmaster ships an update monthly, GrindBook every 3 weeks. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.
| Parameter | Brewmaster | GrindBook |
|---|---|---|
| Price | Free | Free |
| Rating | 1.7 (18 ratings) — better | — |
| Positive reviews | 16.4% of reviews | — |
| Number of ratings | 18 — better | — |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 26 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | acaia | Unhook Studio |
Bugs and requests
Brewmaster
Reported bugs
24 issues- App crashes frequently
- Bluetooth connection unreliable
- Saved images not showing
- Data not saved or deleted randomly
- Timer skips seconds or is inaccurate
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- App crashes when accessing specific features (e.g., kettle settings)
- Cannot edit water or update profile picture
- CSV output incomplete
- App crashes on startup
- Cannot pair with scale
- Lost data after crash
- Saving photos not working
- Connectivity broken after updates
- Auto-start has significant lag
- Background process drains phone battery
- Flow rate measurement changed/inaccurate
- Cannot measure to a tenth of a gram
- Timer only begins when espresso lands in cup, not when start is pressed
- App adds extra seconds to total brew time
- Average flow rate not calculated or displayed
- Information from other apps not retrieved
- Cannot save brew curves after update
- Automatic transfer of notes from one shot to the next
- Timer on scale doesn't run if app is running
Requested features
18 requests- Hire a better software team
- Improve app stability and maintenance
- Update UI to be more modern
- Allow manual data input
- Add dark mode
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- Improve graph readability
- Add flow rate calculator
- Sync scale timer and app timer
- Allow 0.1g accuracy in timer mode
- Auto-stop feature
- Search functionality for previous brews
- Comparison of brew charts side-by-side
- Recommendations for brew ratios by coffee type
- Fix display on iPhone 6+
- Allow editing of profile name
- Change 'Tribe' to 'Brew Method'
- API documentation for third-party apps
- One unified app instead of multiple
GrindBook
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Brewmaster
No in-app purchases
GrindBook
- Small Tip$1.99
- Medium Tip$4.99
- Large Tip$9.99
