HazeLog - Coffee Roast Curves
By YANGLI CHEN
HazeLog is a roast-curve logbook for home coffee roasters, enabling manual event tracking and profile replication on iOS.
The App DNA
What makes this app unique?
The app removes the need for expensive temperature probes by allowing users to log roast events manually and compare them against past sessions, serving the need for consistent results in manual roasting.
For Home coffee roasters using stovetop pans, hand-nets, or small-scale roasters who prioritize manual control and data logging.
What does it look like?
Key features
Overlays a past roast profile onto the live screen to guide temperature and timing adjustments during the roasting process
Records charge, temperature, first crack, second crack, and drop events via large, tap-to-undo buttons designed for one-handed use
Stores all roast logs, photos, and environment data locally on the device without requiring account registration or cloud connectivity
How much does it cost?
Monetization relies on a one-time purchase model rather than subscriptions, gating advanced analytical and export features.
Velocity
Steady developmentnew contentUX improvementsShow more...
The app ships at a steady cadence of approximately 0.6 releases per month, with two distinct versions identified in the recent window. Development is currently focused on enhancing the core roasting workflow through improved data visualization and user-configurable alerts. The latest release demonstrates a clear commitment to feature expansion rather than simple maintenance. This stable trajectory suggests a focused effort on refining the user experience for coffee enthusiasts.
Who built it?
YANGLI CHEN
6 apps tracked · Food & Drink
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Inkarte: Tattoo Client ManagerUser Sentiment
What do users think recently?
How are ratings & reviews evolving?
Not enough recent reviews to extract reliable themes yet.
Read the full review analysisCompetition
Competitive landscape for HazeLog - Coffee Roast Curves
How's the Food & Drink market?
HazeLog operates in the niche Food & Drink sub-segment for coffee enthusiasts, differentiating itself from hardware-dependent logging apps through a one-time purchase model. Its offline-first architecture serves as a primary barrier against churn for users who prioritize privacy and data ownership.
Read the market outlookThe rivals identified
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Access the full report for freeThe Analyst's Read
Key takeaways for HazeLog - Coffee Roast Curves
Where is it heading?
Users report: The home-roasting market is increasingly segmenting between hardware-integrated automation and manual-logging enthusiasts. HazeLog is well-positioned to capture the latter by focusing on privacy and one-time pricing, which insulates it from the subscription fatigue currently affecting broader productivity and hobbyist categories.
- Steady release cadence (two updates in 22 days) demonstrates active maintenance and feature expansion rather than abandonment.
- The one-time purchase model provides a stable, predictable revenue stream that avoids the churn risks associated with subscription-based coffee tools.
The SWOT
- Offline-first architecture removes server-dependency churn risk
- One-time purchase model appeals to users avoiding subscription fatigue
- Ghost-curve overlay enables precise roast reproduction without hardware probes
- Expansion into educational content regarding roast-curve theory could drive Pro-tier conversion
- Integration with green-bean supplier databases could simplify inventory management
Next best moves
Ship a Roast Theory guide in the Pro tier because users lack educational context for curve interpretation → increase Pro-tier conversion
+ 1 more prioritized moveThe counter-intuitive read
HazeLog's offline-only design is a retention lever in the home-roasting market…
Read the full takeBottom line
HazeLog maintains a strong position by serving the manual-roasting niche with a privacy-focused, one-time purchase model. Prioritizing educational content within the Pro tier would unlock higher conversion rates by helping users interpret their roast data more effectively.
Unlock 2 critical frictions, 2 market threats, 1 more prioritized move and the analyst’s take.
Access the full report for freeFAQ
Is HazeLog suitable for beginners?
Does HazeLog require a subscription?
Can I use HazeLog without an internet connection?
What are the alternatives to HazeLog for roast logging?
Sources
- [1] App Store
Report last updated